LAUDA
LAUDA Hydro H 24 Water Bath, 25 to 100 °C, up to 20.9 L, Bath Dimensions 600 x 245 mm, L002904
If a large number of vessels need to be heated to the same temperature at the same time, it is primarily the width of the bath opening that determines how many of them can fit in at once. Measuring 600 x 245 millimetres, the LAUDA Hydro H 24 has the widest bath opening in the Hydro series, with a bath depth of 165 millimetres, the same as the Hydro H 8 and H 16. The bath volume ranges from 11.3 to 20.9 l, and the temperature is controlled within the usual working temperature range of 25 to 100 °C with a temperature stability of ± 0.1 K.Space for many vessels in a rowThe 600-millimetre-wide surface allows significantly more vessels to be placed side by side than with the smaller models in the series, for example, a row of beakers, narrow-necked flasks or sample containers. With a bath depth of 165 millimetres, the Hydro H 24 is particularly suitable for vessels that do not need to be fully submerged. The maximum heating output is 1.5 kilowatts.Uniform temperature across the entire surfaceTemperature control is handled by a 1-point controller, operated via a TFT colour display showing readings in °C or °F. Setpoints are entered in increments of 0.1 °C via a membrane keypad, whilst a timer set in hours and minutes covers three application-specific time functions. In the event of low water level, over- or under-temperature, or in the event of a sensor failure or short circuit, the unit triggers a visual and audible alarm; the trigger points can be adjusted up to ± 10 K. The controller’s electronic function monitoring runs continuously.Robust construction for continuous operationThe bath body, cover frame, sieve base and heating element are made of stainless steel; a drain tap on the bath vessel simplifies water changes given the large surface area. The double-walled, internally domed lid insulates the heat along its entire length and channels condensation away along the dome. The lid and sieve base are included as standard in the scope of delivery.Handling in everyday laboratory useGiven the wide surface area, it is advisable to establish a fixed arrangement for the vessels so that the same volume of water always circulates around each vessel and the temperature remains consistent across the entire row. The drain tap is located at the narrow end of the bath and remains easily accessible even when the bath is fully loaded. Weighing around 18 kilograms, the Hydro H 24 is best placed in a fixed, stable location rather than being moved frequently.Typical applicationsSimultaneous temperature control of multiple vessels in series experimentsSerial testing with a consistent temperature across the entire bath widthQuality assurance with high sample throughputApplications in research and development laboratories with a high demand for vesselsSelection guide: width or depth requiredIf only a few vessels are required, the more compact Hydro H 8, with a bath opening of just 245 x 200 millimetres, is sufficient. For a moderate number of vessels with the same bath depth of 165 millimetres, the narrower Hydro H 16 with a 400 x 245 millimetre opening is suitable. If vessels need to be fully submerged rather than placed side by side, the Hydro H 22, with a bath depth of 225 millimetres instead of 165 millimetres, is better suited to these requirements, whilst offering the same opening width as the Hydro H 16. The largest model in the range, the Hydro H 41, combines greater depth with a bath volume of up to 37.9 l, making it equally suitable for large batches and tall vessels.Technical detailsWorking temperature range25 to 100 °CAmbient temperature range10 to 40 °CTemperature stability± 0.1 KMax. heating output1.5 kWBath dimensions (W x D x H)600 x 245 x 165 mmBath volume min. / max.11.3 / 20.9 LOverall dimensions (W x D x H)700 x 440 x 275 mmWeight (net)18 kgMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Scope of deliveryLAUDA Hydro H 24 water bath with drive and control unit, order number L002904Stainless steel lid, double-walled with an inner curveStainless steel sieve baseMains cable with angled Schuko plug (CEE7/7)Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this appliance from the date of delivery. This is subject to registration at lauda.de within three months of delivery. The warranty covers defects in materials and workmanship. Exclusions include, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adapters. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the Hydro H 24, our procurement service can put together suitable accessories on request, such as holders for vessels or spare parts for lids and sieve bases. We are happy to answer any questions regarding the correct bath size or accessory requirements directly.
LAUDA Hydro H 16 Water Bath, 25 to 100 °C, up to 13.9 L, Bath Dimensions 400 x 245 mm, L002902
If several Erlenmeyer flasks or a row of beakers are to be temperature-controlled at the same time, the size of the bath opening becomes the decisive factor. Measuring 400 x 245 millimetres, the LAUDA Hydro H 16 has a significantly wider opening than the smaller models in the series, whilst maintaining the same bath depth of 165 millimetres. The bath volume ranges from 7.5 to 13.9 l; as with all Hydro water baths, the working temperature range is from 25 to 100 °C with a temperature stability of ± 0.1 K.Wide bath opening for multiple vesselsThe 400 x 245 millimetre bath opening accommodates several narrow vessels side by side without them touching one another. With a depth of 165 millimetres, the bath is particularly suitable for shallower vessel shapes such as beakers, smaller Erlenmeyer flasks or sample bottles, which do not need to be fully submerged. The maximum heating output is 1.5 kilowatts, which is higher than that of the smaller Hydro H 8.Timer, alarms and digital setpoint adjustmentOperation is via a TFT colour display showing temperatures in °C or °F and a membrane keypad with clear symbols. Temperature values can be set in increments of 0.1 °C; a 1-point temperature controller then takes over regulation. The timer supports three application-specific time functions in hours and minutes. In the event of a water shortage, over- or under-temperature, or a sensor break or short circuit, the unit triggers a visual and audible alarm; the trigger points are adjustable up to ± 10 K.Robust construction in stainless steelThe bath body, cover frame, sieve base and heating element are made of stainless steel; the bath vessel has a drain tap for draining the water. The double-walled lid is domed on the inside and provides thermal insulation; as a result, condensation drips down the dome rather than running back into the open vessels. The lid and sieve base are included as standard in the scope of delivery.Handling in everyday laboratory useIf several vessels are placed on a single surface, it is worth checking their arrangement to ensure that heat can circulate evenly around each vessel and that none of them touch one another. The drain tap makes changing the water easier, even though the larger volume of up to 13.9 l means slightly more water needs to be drained than with the smaller Hydro H 8. Weighing around 14 kilograms, the bath can still be placed on the laboratory bench by a single person.Typical applicationsSimultaneous temperature control of several beakers or small Erlenmeyer flasksRoutine experiments in chemical process engineering involving multiple vesselsPreparation and sample processing in research and development laboratoriesScreening tests with a consistently repeated temperatureSelection guide: is a depth of 165 millimetres sufficient?If you only need a few small vessels, the more compact Hydro H 8 with its small 245 x 200 millimetre opening will suffice. If, with the same opening, greater depth is required for taller vessels, the Hydro H 22, with a bath depth of 225 millimetres (instead of 165 millimetres) and a volume of up to 20.3 l, is suitable. For an even wider opening of 600 x 245 millimetres, in which many vessels can be arranged in a row, the Hydro H 24 is suitable. The largest model in the range, the Hydro H 41, holds up to 37.9 l for large batches.Technical detailsWorking temperature range25 to 100 °CAmbient temperature range10 to 40 °CTemperature stability± 0.1 KMax. heating output1.5 kWBath dimensions (W x D x H)400 x 245 x 165 mmBath volume min. / max.7.5 / 13.9 LOverall dimensions (W x D x H)500 x 440 x 275 mmWeight (net)14 kgMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Scope of deliveryLAUDA Hydro H 16 water bath with drive and control unit, order number L002902Stainless steel lid, double-walled with an inner curveStainless steel sieve baseMains cable with angled Schuko plug (CEE7/7)Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this appliance from the date of delivery. This is subject to registration at lauda.de within three months of delivery. The warranty covers defects in materials and workmanship. Exclusions include, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adapters. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the Hydro H 16, our procurement service can put together suitable accessories on request, such as holders for vessels or spare parts for lids and sieve bases. We are happy to answer any questions regarding the correct bath size or accessory requirements directly.
LAUDA Alpha A Immersion Circulator, 25 to 100 °C, Bath Volume up to 50 L, L000618
Not every laboratory or workshop needs a completely new bath thermostat with its own vessel. Often, a tank, basin or water bath is already available, but lacks a temperature control system. The LAUDA Alpha A is an immersion circulator designed precisely for this purpose: using the screw clamp supplied, it is attached to an existing bath vessel and regulates the temperature within it between 25 and 100 °C, without the need to purchase an additional vessel.Clamp mounting on existing containersThe screw clamp fits wall thicknesses of up to 30 millimetres; the immersion depth should be at least 150 millimetres. This allows the Alpha A to be attached to basins, tanks or vats with a volume of up to 50 litres without being permanently installed. Once used in one location, the device can just as easily be moved to another bath vessel, which saves time when tasks change or there are multiple locations within the operation.Display and operationA single-line LED display shows either the actual or the setpoint value; operation is via three buttons and a simple menu system. According to the data sheet, the fully electronic, continuous controller maintains the temperature with a stability of ± 0.05 K. The working temperature range is from 25 to 100 °C, whilst the permissible ambient temperature is between 5 and 40 °C. This range is sufficient for most aqueous and oil-based temperature baths used in everyday laboratory work.Pump and safety featuresThe built-in circulation pump delivers up to 15 litres per minute at a maximum pressure of 0.2 bar; the flow rate can be reduced if a gentler flow is required in the bath. Low-level and over-temperature protection monitor operation with non-flammable liquids; in the event of a fault, the unit emits an audible and visual alarm. The maximum heating power is 1.5 kilowatts, the current consumption is 7 amperes, and the unit is connected via an angled Schuko plug.Typical applicationsRetrofitting temperature control to existing water baths, tanks or vatsImmersion baths in workshops and quality assurance, where a permanently installed bath thermostat is not practicalFlexible use with a variety of containers up to 50 litresSupplementing existing systems without the need to purchase a separate bath vesselRetrofitting multiple containers at different locations using just a single drive unitHeating thermostat with its own bath or cooling thermostatIf no suitable vessel is available, or if the thermostat is to be used permanently with its own bath, the LAUDA Alpha A 6, Alpha A 12 and Alpha A 24 heating thermostats are the more suitable choice. They come with their own stainless steel bath vessel in three sizes ranging from 2.5 to 25 litres. The Alpha A is not designed for active cooling below ambient temperature; in this case, the Alpha RA 8 refrigeration thermostat with compressor cooling takes on this task.Technical data according to DIN 12876The technical data for the Alpha A are determined according to DIN 12876, the standard for recirculating thermostats and bath thermostats in laboratory and industrial applications. This makes it possible to compare specifications relating to temperature stability, heating power and pump capacity across different manufacturers, which is helpful during audits and interlaboratory tests in quality management.Connection for different mains voltagesThe Alpha A operates as standard at 220 volts at 60 hertz or 230 volts at 50 hertz, thus covering the standard European mains supplies; it is connected via an angled Schuko plug. For export, variants with 100-volt and 115-volt mains plugs (NEMA5-15P in each case) as well as with a British BS1363 plug are also available under separate order numbers.Technical detailsWorking temperature range25 to 100 °CAmbient temperature range5 to 40 °CTemperature stability± 0.05 KMax. heating power1.5 kWMax. power consumption1.5 kWCurrent consumption7 AMax. pump pressure0.2 barMax. pump flow rate15 L/minBath volumeup to 50 L, suspended operation in an existing bath vesselSuitable bath vesselsWall thickness up to 30 mm, immersion depth at least 150 mmDimensions (W x D x H)125 x 150 x 300 mmWeight4 kgMains supply220 V; 60 Hz / 230 V; 50 HzMains plugSchuko (CEE7/7), angledStandardTechnical data according to DIN 12876Scope of deliveryLAUDA Alpha A immersion circulator, order number L000618Screw clamp for mounting on existing bath vesselsMains cable with angled Schuko plugOperating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this device, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers material and manufacturing defects. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adapters. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.A cooling coil set and a pump connection set are available as accessories for the Alpha A, allowing the bath to be cooled further or integrated into an external circuit. We can compile a selection of suitable accessories and spare parts for the Alpha A on request, ranging from the screw clamp to pump connections.
LAUDA Puridest PD 4 Mono Distillation Apparatus, 4 L/h, without Storage Tank, L003012
For those who need small quantities of distilled water on a continuous basis in the laboratory without having to carry a storage container around, the LAUDA Puridest PD 4 is a benchtop unit that dispenses the distillate directly from the condenser. This mono distillation apparatus produces up to 4 litres of distilled water per hour with a conductivity of 2.3 µS/cm at 25 °C, pure enough for diluting reagents and sample solutions according to DAB regulations and international pharmacopoeia standards. Without a storage tank, the unit fits on any laboratory bench and can be connected directly to a Schuko socket using the supplied mains cable.Collect distillate directly from the condenserThe PD 4 does not have a storage tank. The distillate flows out via a drain pipe on the condenser and is collected directly into a vessel. The cooling water supply is controlled manually via the outlet temperature, whilst a CO₂ vent on the condenser prevents dissolved gases from entering the distillate. A thermostatic low-water protection switch cuts off the heating as soon as the cooling water flow is too low. The distillation flask is easily accessible for cleaning. If you do not require automatic level monitoring, this simple design without electronics on the storage tank will suffice.Compact and economical in cooling water consumptionWithout accessories, the PD 4 measures just 280 x 250 x 490 millimetres and weighs 8 kilograms net; when packed, it weighs 10 kilograms. The maximum heating output is 3 kilowatts, whilst cooling water consumption is 0.67 litres per minute, the lowest figure in the Puridest Mono series. The cooling water connection works with a pressure differential from 1 bar, and the maximum pressure is 2 bar; both the inlet and outlet hoses have a 1/2-inch thread. The unit operates on 230-volt alternating current via the angled Schuko plug; a three-phase power supply is not required.Water quality according to DAB and pharmacopoeiaThe conductivity of 2.3 µS/cm at 25 °C is significantly lower than that of normal tap water, making it suitable for applications that require high-purity, low-gas, germ-free and pyrogen-free water. According to the manufacturer, the Puridest series complies with the regulations of the German Pharmacopoeia (DAB) as well as international pharmacopoeia standards. No specially trained personnel are required for commissioning, and routine maintenance is also straightforward. Furthermore, the unit does not impose high demands on the quality of the raw water supplied to it.Typical applicationsDirect water supply for sample preparation and reagent dilution at the laboratory benchSupplement to the drinking water supply where no central ultrapure water system is availableResearch and development with varying, smaller daily requirements for distillateTraining and teaching, where a simple setup without a storage tank is sufficientWhich Puridest model is right for youFor those who prefer to have distillate on hand automatically rather than collecting it as it flows, the Puridest PD 4 R offers the same hourly output with an integrated 8-litre storage tank and tap. For higher demand, the Puridest PD 8 R with 8 litres per hour and the Puridest PD 12 R with 12 litres per hour are available, both with a three-phase connection. Where contact with stainless steel needs to be avoided, the structurally identical Puridest PD 4 G is available, featuring glass contact parts.Technical detailsProduction capacity4 L/hConductivity of mono-distillate at 25 °C2.3 µS/cmMax. heating output3 kWMax. power consumption3 kWCooling water consumption0.67 L/minMinimum cooling water pressure differential1 barMaximum cooling water pressure2 barWater cooling inlet1/2-inch hose connectionWater cooling drain1/2-inch hose connectionDimensions (W x D x H)280 x 250 x 490 mmNet weight8 kgGross weight (including packaging)10 kgPackaging dimensions (L x W x H)0.58 x 0.43 x 0.5 mAmbient temperature range10 to 40 °CMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Storage tankNo storage tank, tabletop installationMaterial of distillation flask/condenserStainless steelScope of deliveryLAUDA Puridest PD 4 distillation unit, order number L003012Mains cable with angled Schuko plugCooling water hoses and collection vessels for the distillate are not included in the scope of delivery and must be purchased separately.Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this unit from the date of purchase. Your statutory warranty rights remain unaffected.For the PD 4, cooling water hoses, connection fittings and spare parts such as the distillation flask or condenser may be required. On request, we can compile the appropriate accessories and spare parts for the relevant Puridest model, including for a subsequent upgrade to a version with a storage tank.
LAUDA Puridest PD 4 R Mono Distillation Apparatus, 4 L/h, 8-Litre Storage Tank, L003014
The LAUDA Puridest PD 4 R produces the same 4 litres of distillate per hour as the PD 4, but stores the water in a built-in 8-litre storage tank and dispenses it via a tap. The conductivity of the mono-distillate is 2.3 µS/cm at 25 °C, which is sufficiently pure for diluting reagents and sample preparations according to DAB regulations and international pharmacopoeia standards. As the unit monitors its own water level and automatically replenishes it, it continues to run unattended during lunch breaks or at weekends.Fully automatic operation with an 8-litre storage tankWith a capacity of 8 litres, the storage tank holds twice the unit’s hourly output and can be mounted either on the wall or on a table. The dispensing tap has a continuous and a momentary setting, allowing both larger quantities to be dispensed and individual vessels to be filled in measured quantities. A solenoid valve controls the water supply, whilst an electronic level sensor triggers automatic refilling after each dispensing cycle. The condenser is housed in the storage tank and can be replaced if necessary.Electronic contamination monitoringAn electronic monitoring system detects contamination in the distillation flask, stops the distillation process and displays a visual cleaning prompt before the water quality is compromised. A thermostatic low-water protection system provides additional protection against the heater running dry. Thanks to the automatic shut-off once the fill level is reached, the unit does not consume any unnecessary water.Connected load specifications and cooling water requirementsLike the PD 4, the PD 4 R operates on 230-volt alternating current via the angled Schuko plug; the maximum heating output is 3 kilowatts. Cooling water consumption is 0.8 litres per minute; however, the connection requires a higher pressure differential of at least 3 bar and a maximum of 7 bar. The inlet hose has a 1/2-inch thread, whilst the drain has a 3/4-inch thread. When packed, the unit weighs 24.5 kilograms, with packaging dimensions of 0.69 x 0.42 x 0.59 metres. The unit itself measures 620 x 330 x 460 millimetres, excluding accessories.Typical applicationsProvision of a buffered distillate supply for sample preparation and reagent dilutionUnattended operation overnight or at weekends thanks to automatic refillingWall or bench-top mounting, where space on the laboratory bench is limitedResearch, quality assurance and training with regular, predictable water requirementsWhich Puridest model is right for youFor those who do not require a storage tank and instead draw water continuously from the condenser, the Puridest PD 4 offers a simpler benchtop version with the same hourly output. For a larger supply and higher throughput, the Puridest PD 8 R with a 16-litre storage tank and the Puridest PD 12 R with a 24-litre storage tank are available, both with a three-phase connection. Where contact with stainless steel needs to be avoided, the structurally identical Puridest PD 4 G is available, featuring glass contact parts.Technical detailsProduction capacity4 L/hConductivity of mono-distillate at 25 °C2.3 µS/cmTank capacity8 LMax. heating output3 kWMax. power consumption3 kWCooling water consumption0.8 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet1/2-inch hose connectionWater cooling drain3/4-inch hose connectionDimensions (W x D x H)620 x 330 x 460 mmNet weight21 kgGross weight (including packaging)24.5 kgPackaging dimensions (L x W x H)0.69 x 0.42 x 0.59 mAmbient temperature range10 to 40 °CMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Storage tank8 L, integrated, wall- or table-mountedMaterial of distillation flask/condenser/storage tankStainless steelScope of deliveryLAUDA Puridest PD 4 R distillation unit with integrated storage tank, order number L003014Mains cable with angled Schuko plugWall bracket, cooling water hoses and connection fittings are not included in the scope of delivery and must be procured separately.Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected.For the PD 4 R, wall brackets, cooling water hoses, connection fittings and spare parts such as condensers or distillation flasks may be required. On request, we can compile the appropriate accessories and spare parts for the relevant Puridest model, including for upgrading to a version with higher production capacity.
LAUDA Alpha RA 8 Cooling Thermostat, -25 to 100 °C, 5 to 7.5-litre Bath, L004603
Anyone who needs to maintain precise temperatures for small volumes in the laboratory, for example, when calibrating a viscometer, cooling a cuvette in analytical chemistry, or operating a small external reactor, requires a bath that can quickly reach sub-zero temperatures and takes up little floor space. With its 5.0 to 7.5-litre stainless steel bath, the LAUDA Alpha RA 8 caters precisely to this market segment. The operating temperature range extends from -25 to 100 °C, with cooling provided by a built-in compressor using the natural refrigerant R-290.Compressor cooling with automatic controlThe RA 8 actively cools via a built-in compressor; there is no need for an external cooling water connection or an additional circulation cooler. An automatic compressor control system switches the compressor on and off as required, which extends its service life and reduces energy consumption during continuous operation. The unit dissipates heat into the ambient air via an air-cooled condenser.Cooling capacity across the operating rangeWith ethanol as the bath medium, the RA 8 delivers a cooling capacity of 0.325 kW at 20 °C, 0.26 kW at 0 °C, at -20 °C it is still 0.1 kW, and at the lower limit of -25 °C it is 0.07 kW. The maximum heating power is 1.5 kW, the total power consumption is a maximum of 1.8 kW, and the current consumption is 8 A. LAUDA specifies the temperature stability as ± 0.05 K; a 1-line LED display and a fully electronic, continuous controller handle the display and control functions.Circulation pump for external loadsA bath lid, a pump connection set and a short-circuit hose are supplied as standard. The built-in circulation pump delivers up to 15 L/min at a maximum pressure of 0.2 bar and can therefore also be used for small external loads such as a double-jacketed reactor or a cold trap. A drain connection on the rear facilitates the replacement of the bath medium.Safety during continuous operationLow-level protection and over-temperature protection monitor operation; in the event of deviations, the unit triggers an audible and visual alarm. The stainless steel bath vessel, with internal dimensions of 165 x 177 x 160 mm, is suitable for small batches of samples; the entire unit weighs 29 kg and measures 235 x 500 x 605 mm (W x D x H).Typical applicationsCalibration and testing of viscometers at defined sub-zero temperaturesTemperature control of cuvettes and small sample vessels in analytical applicationsCooling of small external reactors or double-jacketed vessels via the circulation pumpTraining and routine operation where only a small bath volume is requiredSelection guide within the Alpha seriesIf the bath volume of the RA 8 is insufficient for several vessels or a larger external load, the LAUDA Alpha RA 12 (9.5 to 14.5 l) and the LAUDA Alpha RA 24 (14 to 22 l) are available as two larger sister models with the same operating temperature range. If no active cooling is required at all, the LAUDA Alpha A 6 heating thermostat meets the same temperature control requirements without a built-in compressor.Technical detailsOperating temperature range-25 to 100 °CAmbient temperature range5 to 40 °CTemperature stability± 0.05 KBath volume min. / max.5.0 / 7.5 LBath dimensions (W x D x H)165 x 177 x 160 mmOverall dimensions (W x D x H)235 x 500 x 605 mmWeight29 kgMax. heating power1.5 kWCooling capacity at 20 °C (ethanol)0.325 kWCooling capacity at 0 °C (ethanol)0.26 kWCooling capacity at -20 °C (ethanol)0.1 kWCooling capacity at -25 °C (ethanol)0.07 kWMax. power consumption1.8 kWCurrent consumption8 APump flow rate, max.15 L/minMax. pump pressure0.2 barMains supply220 V; 60 Hz / 230 V; 50 HzMains plugMains cable with angled Schuko plug (CEE7/7)RefrigerantR-290 (natural refrigerant), 0.052 kgStandardDIN 12876Scope of deliveryLAUDA Alpha RA 8 cooling thermostat with stainless steel bath vessel, order number L004603Bath lidPump connection setShort-circuit hose for pump connectionsMains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.The appliance operates using the natural refrigerant R-290 (propane), with a charge of 0.052 kg and a GWP of 3. LAUDA states the CO2 equivalent as 0.0 tonnes.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers material and manufacturing defects. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the RA 8, our procurement service can, if required, put together suitable accessories, such as a temperature-control fluid for operation down to -25 °C, an additional bath lid or hoses for the external pump connection. We can also request spare parts from the manufacturer on your behalf.
LAUDA Hydro H 8 Water Bath, 25 to 100 °C, up to 7 L, Bath Dimensions 245 x 200 mm, L002901
Anyone who regularly needs to bring individual test tubes, small sample vessels or a single round-bottom flask up to a specific temperature in the laboratory does not need a large water bath, but rather one that takes up little space and heats up quickly. With a bath volume of 3.8 to 7.0 l, the LAUDA Hydro H 8 is the most compact model in the Hydro series. The operating temperature range extends from 25 to 100 °C with a temperature stability of ± 0.1 K, making applications right up to the boiling point possible.Small bath, short heating timeThe bath opening measures 245 x 200 millimetres with a depth of 165 millimetres. The maximum heating power of 1 kilowatt is tailored to this bath size, ensuring the water reaches the required temperature quickly. For routines involving just a few vessels, such as thawing small samples, incubating individual tubes or temperature-controlling calibration solutions, the Hydro H 8 is the model with the smallest bath within the range.Operation via TFT colour displayA TFT colour display shows both the actual and setpoint values simultaneously; the temperature display can be switched between °C and °F. Setpoints are adjusted in 0.1 °C increments via a membrane keypad with clear symbols; a 1-point temperature controller then maintains the temperature at a constant level. A timer set in hours and minutes allows three application-specific time functions to be programmed, enabling the bath to run unattended for a specified duration. In the event of low water level, over- or under-temperature, or in the event of a sensor failure or short circuit, the unit emits a visual and audible alarm; the trigger points for the temperature alarm can be set to a maximum of ± 10 K.Stainless steel inside and outThe bath body, cover frame, sieve base and heating element are made of stainless steel. The bath vessel has a drain tap, allowing the water to be drained without tilting the bath. The lid supplied is thermally insulated, double-walled and domed on the inside; condensation runs down the dome to the side rather than dripping back into the vessels.Handling in everyday laboratory useThe drain tap on the bath vessel means that changing the water in this small volume takes just a few minutes; a drain hose is not strictly necessary. As the bath holds only a small amount of water, it can also be operated using distilled water or a temperature-control fluid without the cost per fill being a significant factor. The unit operates at a rated voltage of 230 volts at 50 or 60 hertz.Typical applicationsTemperature control of individual test tubes, sample tubes or small flasks in research and quality assuranceCalibration baths for thermometers and sensors in the low-volume rangeThawing and preheating small sample quantities in medical technologySecondary workstations and teaching laboratories with limited floor spaceSelection guide: which Hydro size is right for youIf the bath volume of the H 8 is insufficient for multiple vessels, the series offers four larger models. With the same bath depth but a significantly wider opening of 400 x 245 millimetres, the Hydro H 16 accommodates more vessels side by side. Those requiring additional depth for tall flasks will find it in the Hydro H 22, which offers a bath volume of up to 20.3 l. The Hydro H 24 is suitable for an even wider opening of 600 x 245 millimetres, allowing many vessels to be placed in a row. The largest model in the range, the Hydro H 41, has a capacity of up to 37.9 l and is suitable for large batches or particularly tall vessels.Technical detailsOperating temperature range25 to 100 °CAmbient temperature range10 to 40 °CTemperature stability± 0.1 KMax. heating power1 kWBath dimensions (W x D x H)245 x 200 x 165 mmBath volume (min./max.)3.8 / 7.0 LOverall dimensions (W x D x H)340 x 395 x 275 mmWeight (net)10 kgMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Scope of deliveryLAUDA Hydro H 8 water bath with drive and control unit, order number L002901Stainless steel lid, double-walled with an inner curveStainless steel sieve baseMains cable with angled Schuko plug (CEE7/7)Regulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this appliance from the date of delivery. This is subject to registration at lauda.de within three months of delivery. The warranty covers defects in materials and workmanship. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adapters. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the Hydro H 8, our procurement service can put together suitable accessories on request, such as holders for vessels or spare parts for lids and sieve bases. We are happy to answer any questions regarding the correct bath size or accessory requirements directly.
LAUDA Loop L 100 Circulation Thermostat, 4 to 80 °C, 120 Watt Cooling Capacity, L000027
Anyone wishing to operate an external circuit at a constant temperature without the space and noise associated with a compressor will find the LAUDA Loop L 100 circulation thermostat to be a compact device for the laboratory bench. It cools and heats thermoelectrically using Peltier elements, covers a working temperature range of 4 to 80 °C and delivers a cooling capacity of 120 watts at 20 °C. For smaller external loads with limited cooling requirements, such as individual double-jacketed vessels or measuring cells, this is generally sufficient, without the need to purchase a larger cooling unit with its own refrigerant circuit.Cooling without refrigerantThe Loop L 100 operates entirely without refrigerant. Thermoelectric cooling via Peltier elements requires no refrigerant circuit, compressor or condenser, and consequently runs noticeably more quietly and with less vibration than a conventional compressor-based unit in the same performance class. The sound pressure level is 57 dB(A), the power consumption is a maximum of 0.24 kilowatts, and the heating power is a maximum of 0.2 kilowatts. Under partial load, that is, when only a small amount of cooling or heating is required, the power consumption drops accordingly. Weighing 7 kilograms, the unit is also easy to move around.Operation and connectionA graphical OLED display shows setpoint and actual values in plain text; operation is via three buttons with simple menu navigation. An RS232 interface allows connection to a higher-level control system or a logging system. The supply and return lines are fitted with 1/4-inch quick-connect couplings; the connected external load can be changed without tools. The internal pump delivers up to 3 litres per minute at a maximum pressure of 0.8 bar; the bath’s maximum filling volume is 0.28 litres. The unit operates with non-flammable liquids such as water or water-glycol mixtures.Installation and mains connectionThe Loop L 100 is designed for ambient temperatures of 5 to 40 °C and operates on a mains supply of 100 to 240 volts at 50 or 60 hertz; it can therefore be operated in various mains environments without a voltage converter. A mains cable with an angled Schuko plug is supplied as standard. For export, LAUDA lists further plug variants, for example for the UK, Australia, North America or Brazil, which are listed under separate order numbers. If you require one of these variants, it is best to check with us before placing your order.Typical applicationsAs an external temperature control unit, the Loop L 100 is used wherever a compact unit is sufficient:Tempering of external double-jacketed vessels and small reaction vesselsMaintaining a constant temperature on measuring cells, cuvette holders and viscometersContinuous operation on small test set-ups without their own refrigeration systemLaboratory environments where quiet, low-vibration operation is requiredSelection guide: which Loop is right for youIf the cooling capacity of the L 100 is insufficient for the external circuit, the LAUDA Loop L 250, with 250 watts and the same operating concept, offers approximately double the capacity. If significantly more cooling capacity is required, for example, for larger external circuits or lower temperatures in the sub-zero range, the compressor-based LAUDA Alpha RA 8, LAUDA Alpha RA 12 and LAUDA Alpha RA 24 cooling thermostats are the more suitable choice.Technical detailsWorking temperature range4 to 80 °CAmbient temperature range5 to 40 °CTemperature stability± 0.1 KMax. heating power0.2 kWCooling capacity at 20 °C (ethanol)0.12 kWCooling capacity at 10 °C (ethanol)0.06 kWFlow/return connection1/4-inch quick-connect couplingMax. fill volume0.28 LPump flow rate, max.3 L/minPump pressure, max.0.8 barDimensions (W x D x H)175 x 301 x 266 mmWeight7 kgSound pressure level57 dB(A)Max. power consumption0.24 kWMains supply100-240 V; 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Safety class (DIN 12876)I / NFLStandardDIN 12876Scope of deliveryLAUDA Loop L 100 circulation thermostat, order number L000027Mains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.The Loop L 100 operates using thermoelectric, refrigerant-free cooling technology based on Peltier elements. Labelling in accordance with Regulation (EU) 2024/573 on certain fluorinated greenhouse gases is therefore not required.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers defects in materials and workmanship. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.A silicone hose is available as an accessory for the Loop L 100, compatible with the quick-connect couplings on the supply and return lines. Our procurement service can, if required, put together a selection of suitable hoses, temperature control fluids and other accessories for the unit.
LAUDA Puridest PD 8 R Mono Distillation Apparatus, 8 L/h, 16-Litre Storage Tank, L003015
Compared with the PD 4 R, the LAUDA Puridest PD 8 R doubles the production capacity to 8 litres of distillate per hour and stores the distillate in a built-in 16-litre tank. The conductivity of the mono-distillate remains at 2.3 µS/cm at 25 °C, which is pure enough for reagent dilution and sample preparation according to DAB regulations and international pharmacopoeia standards. To achieve this higher throughput, the unit requires a 400-volt three-phase power supply rather than a standard mains socket.More supply for multiple workstationsWith a capacity of 16 litres, the storage tank also covers periods of increased demand, such as when several workstations are supplied from the same unit, as it holds twice the unit’s hourly output. The tap can be used for both continuous dispensing and short bursts; a solenoid valve regulates the water supply to the tank. If the water level drops after dispensing, the electronic level sensor detects the requirement and the unit automatically replenishes the supply. The condenser is located inside the tank itself and can be removed for replacement.Three-phase connection and cooling water consumptionThe PD 8 R is connected to the mains via a red CEE plug according to IEC 60309, rated at 16 amps, five-pin for 400 volts with a neutral and earth conductor. The heater draws a maximum of 6 kilowatts; the cooling water flows through at a rate of 1.2 litres per minute, with a pressure differential of between 3 and 7 bar. The inlet and drain have different thread sizes: 1/2 inch on the inlet and 3/4 inch on the drain. The unit weighs 34 kilograms net, and its footprint measures 780 x 410 millimetres.Contamination monitoring and water savingIf the distillation flask becomes contaminated, an electronic monitoring system detects this, stops the distillation process and displays a visual prompt to clean the unit. A thermostatic safety device also intervenes should the cooling water supply be interrupted, protecting the heating element from running dry. As the unit switches off automatically once the fill level is reached, no water continues to flow through unnecessarily.Typical applicationsSupplying distillate to several workstations from a central unitSample preparation and reagent dilution with higher daily requirementsQuality assurance and research in facilities with an existing three-phase power supplyTraining and teaching at institutes with several groups working in parallelWhich Puridest model is right for you?If a smaller supply is sufficient, the Puridest PD 4 R offers the same automatic operation at 4 litres per hour with an 8-litre storage tank, powered by a standard Schuko socket. For even higher demand, there is the Puridest PD 12 R with 12 litres per hour and a 24-litre storage tank. Where contact with stainless steel needs to be avoided, the structurally identical Puridest PD 8 G with glass contact parts is available; for higher purity requirements, the Puridest PD 8 D with bi-distillation is available.Technical detailsProduction capacity8 L/hConductivity of mono-distillate at 25 °C2.3 µS/cmTank capacity16 LMax. heating output6 kWMax. power consumption6 kWCooling water consumption1.2 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet1/2-inch hose connectionWater cooling drain3/4-inch hose connectionDimensions (W x D x H)780 x 410 x 540 mmNet weight34 kgGross weight (including shipping packaging)40.8 kgPackaging dimensions (L x W x H)0.92 x 0.72 x 0.55 mAmbient temperature range10 to 40 °CMains supply400 V, 3/N/PE, 50/60 HzMains plugMains cable with plug according to IEC 60309, 5-pin, CEE, red, 16 AStorage tank16 L, integrated, wall- or table-mountedMaterial of distillation flask/condenser/storage tankStainless steelScope of deliveryLAUDA Puridest PD 8 R distillation unit with integrated storage tank, order number L003015Mains cable with CEE plug (IEC 60309)Wall bracket, cooling water hoses and connection fittings are not included in the scope of delivery and must be purchased separately.Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected.For the PD 8 R, wall brackets, cooling water hoses, connection fittings and spare parts such as condensers or distillation flasks may be required. On request, we can put together the appropriate accessories and spare parts for the relevant Puridest model, including for upgrading to a smaller or larger model within the series.
LAUDA Loop L 250 Circulation Thermostat, 4 to 80 °C, 250 Watt Cooling Capacity, L000580
If the external circuit requires more heating and cooling capacity than a small benchtop unit can provide, without the need for a large compressor unit with its own refrigerant circuit, the LAUDA Loop L 250 is suitable. This thermoelectric circulation thermostat covers the same working temperature range of 4 to 80 °C as the smaller L 100, but delivers 250 watts of cooling capacity at 20 °C and, if required, up to 0.4 kilowatts of heating power. This allows even larger external volumes or multiple loads on a single circuit to be maintained at a stable temperature.More power with the same operating conceptOperation and connection technology are the same as for the L 100: a graphical OLED display, plain-text menu, three-button control and an RS232 interface for connection to a higher-level control system. The difference lies in the performance class. As with the smaller model, the internal pump delivers up to 3 litres per minute at a maximum of 0.8 bar, whilst the bath’s maximum capacity is slightly higher at 0.32 litres. Anyone already using an L 100 who switches to the L 250 will therefore not need to familiarise themselves with a new system.Refrigerant-free even in the larger modelThe L 250 also uses thermoelectric cooling via Peltier elements and requires no refrigerant circuit. As with the smaller model, the sound pressure level is 57 dB(A) and the maximum power consumption is 0.4 kilowatts. Measuring 261 x 368 x 312 millimetres and weighing 12 kilograms, the unit is significantly larger than the L 100, but remains compact enough for a unit in this performance class to be installed directly next to the load.Installation and mains connectionThe L 250 is also designed for ambient temperatures of 5 to 40 °C and operates on a mains supply of 100 to 240 volts at 50 or 60 hertz. A mains cable with an angled Schuko plug is supplied as standard; for export, LAUDA offers further plug variants under their own order numbers, for example for the UK, Australia, North America or Brazil. If required, we will clarify which variant is suitable for the respective target market before the order is placed.Typical applicationsWith its higher heating and cooling capacity, the Loop L 250 is suitable for tasks that go beyond a single small measuring cell:Temperature control of larger double-jacketed reactors and stirred tanksSimultaneous supply to several smaller external loads on a single circuitApplications with varying heating and cooling capacity requirements within the same processContinuous operation in laboratory environments without a separate refrigeration systemSelection guide: which Loop is right for youIf the cooling capacity of the L 250 is insufficient, or if a significantly wider temperature range down to sub-zero temperatures is required, the compressor-based LAUDA Alpha RA 8, LAUDA Alpha RA 12 and LAUDA Alpha RA 24 cooling thermostats are the more suitable choice. For smaller external loads with lower power requirements, the more compact LAUDA Loop L 100 is often sufficient.Technical detailsWorking temperature range4 to 80 °CAmbient temperature range5 to 40 °CTemperature stability± 0.1 KMax. heating power0.4 kWCooling capacity at 20 °C (ethanol)0.25 kWCooling capacity at 10 °C (ethanol)0.13 kWFlow/return connection1/4-inch quick-connect couplingMax. fill volume0.32 LPump flow rate, max.3 L/minPump pressure, max.0.8 barDimensions (W x D x H)261 x 368 x 312 mmWeight12 kgSound pressure level57 dB(A)Max. power consumption0.4 kWMains supply100-240 V; 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Safety class (DIN 12876)I / NFLStandardDIN 12876Scope of deliveryLAUDA Loop L 250 circulation thermostat, order number L000580Mains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Like the smaller L 100, the Loop L 250 operates using thermoelectric, refrigerant-free cooling technology based on Peltier elements. Labelling in accordance with Regulation (EU) 2024/573 on certain fluorinated greenhouse gases is therefore not required.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers defects in materials and workmanship. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.A silicone hose is also available as an accessory for the Loop L 250, compatible with the quick-connect couplings on the supply and return lines. If you also require a different mains plug variant for export or a different temperature-control fluid, please contact our procurement service, which will put together the appropriate accessories for you.
LAUDA Puridest PD 4 G Glass Distillation Apparatus, 4 L/h, Conductivity 2.2 µS/cm, L003018
For those in the laboratory who need fresh, high-purity water every day for dilutions and sample preparations, but have neither the space for a large storage tank nor the time for labour-intensive maintenance, the Puridest PD 4 G offers a simple introduction to glass distillation. This mono distillation apparatus from the LAUDA Puridest range distils up to 4 litres of water per hour and allows the entire process to be viewed through a shatterproof, non-misting front pane. The distillation flask and condenser are made of Duran borosilicate glass 3.3, whilst the heating rods are sheathed in quartz glass.Visible distillation process through glassThe operating principle of the PD 4 G has been deliberately kept simple. Raw water flows through a solenoid valve into the distillation flask, is heated and then condenses in a condenser section designed to prevent droplet formation. A CO₂ degassing port on the condenser, together with an electronic contamination monitor which, if necessary, automatically triggers a water change to clean the distillation flask, ensures low-maintenance operation. An electronic level monitoring system operates throughout the entire distillation process and automatically switches off the heating if there is a lack of water in the evaporator. The condenser section is sterilised by steam, without the need to dismantle the unit.Connection and cooling water requirementsThe PD 4 G operates from a 230-volt socket and draws a maximum of 3 kilowatts; the mains cable terminates in an angled Schuko plug according to CEE7/7. Cooling requires 1.2 litres of cooling water per minute, with a minimum pressure differential of 3 bar and a maximum permissible pressure of 7 bar at the connection. The inlet and drain for the water cooling system are designed for a 1/2-inch diameter hose. The unit does not have a storage tank; the mono-distillate, with a conductivity of 2.2 µS/cm at 25 °C, drains directly via the hose connection on the right-hand side of the unit.Typical applicationsProduction of high-purity mono-distillate for diluting reagents and preparing samplesSample preparation and quality assurance in research and developmentRoutine analytical work where the distillation process needs to remain visibleWall-mounted or benchtop installation in smaller laboratories without a dedicated storage tankSeries overviewThe Puridest series comprises six mono distillation apparatuses covering capacities from 4 to 12 litres per hour, available with either stainless steel or glass contact materials. For those requiring a higher distillate output per hour, the Puridest PD 8 G offers the same glass construction with a capacity of 8 litres per hour. If a lower conductivity is required, for example for cell or tissue cultures, the Puridest PD 4 D operates in a two-stage process and achieves 1.6 µS/cm; the Puridest PD 4 DG combines this two-stage bi-distillation with an all-glass construction. Those who prefer stainless steel to glass will find the same performance class in a stainless steel version with the Puridest PD 4 R.Technical detailsProduction capacity4 L/hConductivity of mono-distillate at 25 °C2.2 µS/cmHeating output / max. power consumption3 kWCooling water consumption1.2 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet and drain1/2 inch, hose connectionDimensions (W x D x H)650 x 200 x 390 mmNet weight16 kgGross weight (including shipping packaging)20.8 kgPackaging dimensions (L x W x H)0.92 x 0.62 x 0.5 mAmbient temperature range10 to 40 °CMains supply230 V, 50/60 HzMains plugSchuko CEE7/7, angledMaterial of distillation flask / condenserDuran borosilicate glass 3.3, heating elements encased in quartz glassScope of deliveryLAUDA Puridest PD 4 G, base unit (order number L003018)Mains cable with angled Schuko plug (CEE7/7)Accessories required for operation, such as connection hoses for the cooling water supply or a wall bracket, are not included in the scope of delivery.Regulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected.For the day-to-day operation of the PD 4 G, the most important items are the connection hoses for the cooling water supply and, depending on the installation location, a wall bracket. Our procurement service will, on request, compile a list of suitable accessories and spare parts for the Puridest series and can also advise on whether, for a specific application, the 8-litre model, a bi-distillation variant or a stainless steel model from the same series would be the more suitable choice.
LAUDA Microcool MC 600 Recirculating Chiller, -10 to 40 °C, 600 Watts Cooling Capacity, L004455
If the cooling capacity of a benchtop unit is no longer sufficient and you are looking for a recirculating chiller to be installed under the laboratory bench or on the floor, the LAUDA Microcool MC 600 delivers a cooling capacity of 600 watts at 20 °C. The unit covers an operating temperature range of -10 to 40 °C and uses the natural refrigerant R-290, a hydrocarbon, for cooling. Measuring 350 x 480 x 595 millimetres and weighing 50 kilograms, the MC 600 is designed for floor installation rather than placement on a laboratory bench.Cooling capacity across the temperature rangeThe cooling capacity decreases as the setpoint temperature falls: at 40 °C with a water-glycol mixture, the MC 600 delivers 0.6 kilowatts; at 20 °C with ethanol, it also delivers 0.6 kilowatts; at 10 °C it still delivers 0.5 kilowatts, at 0 °C 0.37 kilowatts and at minus 10 °C 0.2 kilowatts. The magnetically coupled block pump delivers up to 35 l per minute at a maximum pressure of 1.3 bar via connections with G 3/4-inch threads. An adjustable bypass limits the pressure in the circuit.Operation and safetyA 1-line LED display shows the actual or setpoint value; operation is via three buttons with fully electronic, continuous control. An illuminated liquid level indicator with a low-level alarm and winding temperature monitoring for the pump ensure continuous operation, whilst an auto-start timer and an auto-shutdown function enable automated operation. The sound pressure level is 54 dB(A), the power consumption is a maximum of 0.62 kilowatts, and the current consumption is 3.2 amperes. An RS232 interface is available for connection to a higher-level control system.Installation and mains connectionThe MC 600 operates on a 230-volt, 50-hertz mains supply. A mains cable with an angled Schuko plug is supplied as standard. LAUDA offers further plug variants from the same series, for example for the UK or North America, each with its own order number. The fill port is located at the top of the unit, whilst the drain port for changing the coolant is situated at the rear.Typical applicationsAs an external cooling source for floor-mounted installations, the MC 600 is suitable for the following applications, amongst others:Cooling of larger rotary evaporators and condensersTemperature control of reactors and double-jacketed vessels with higher cooling requirementsCooling of multiple loads on a shared circuitContinuous operation in laboratories with limited bench spaceSelection guide within the Microcool rangeIf the cooling capacity of the MC 600 is insufficient, the LAUDA Microcool MC 1200, with 1,200 watts, delivers approximately double the capacity whilst operating on the same principle. For smaller set-ups with limited space on the laboratory bench, the more compact LAUDA Microcool MC 350 is often sufficient. If a heating function is also required within the same circuit, the compressor-based LAUDA Alpha RA 12 and LAUDA Alpha RA 24 cooling thermostats are the more suitable choice.Technical detailsOperating temperature range-10 to 40 °CAmbient temperature range5 to 40 °CTemperature stability± 0.5 KCooling capacity at 40 °C (water-glycol)0.6 kWCooling capacity at 20 °C (ethanol)0.6 kWCooling capacity at 10 °C (ethanol)0.5 kWCooling capacity at 0 °C (ethanol)0.37 kWCooling capacity at -10 °C (ethanol)0.2 kWInlet/outlet connectionG 3/4 inchFilling volume min. / max.4 / 8 LPump flow rate, max.35 L/minMax. pump pressure1.3 barDimensions (W x D x H)350 x 480 x 595 mmWeight50 kgSound pressure level54 dB(A)Max. power consumption0.62 kWCurrent consumption3.2 AMains supply230 V; 50 HzMains plugMains cable with angled Schuko plug (CEE7/7)RefrigerantR-290, 0.065 kgStandardDIN 12876Scope of deliveryLAUDA Microcool MC 600 recirculating chiller, order number L004455Mains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.The appliance operates using the natural refrigerant R-290, with a charge of 0.065 kg and a GWP of 3, which, according to the data sheet, corresponds to a CO2 equivalent of approximately 0.0 tonnes. As a hydrocarbon refrigerant, R-290 is not covered by Regulation (EU) 2024/573 on certain fluorinated greenhouse gases.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of original LAUDA temperature control fluids. The warranty covers defects in materials and workmanship. Excluded are, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.A fabric-reinforced EPDM hose for connections with a G 3/4-inch thread is available for the MC 600. Our procurement service will, on request, compile a list of suitable accessories and spare parts.
LAUDA Puridest PD 8 G Glass Distillation Apparatus, 8 L/h, Conductivity 2.2 µS/cm, L003019
If the 4-litre models in the Puridest range are no longer sufficient to meet daily water requirements, for example, because several workstations need to be supplied with mono-distillate simultaneously, the PD 8 G steps in with double the throughput. The glass distillation unit produces up to 8 litres of distilled water per hour at a conductivity of 2.2 µS/cm and allows the entire distillation process to be viewed through a shatterproof front pane. As with the smaller model, the distillation flask and condenser are made of Duran borosilicate glass 3.3, whilst the heating rods are sheathed in quartz glass.Higher throughput with the same glass constructionTo achieve 8 litres per hour instead of 4, the PD 8 G operates with a heating output of 6 kilowatts, twice that of the PD 4 G. The operating principle remains the same: A solenoid valve controls the water supply; the condenser section is designed to prevent droplet formation; a CO₂ degassing port releases dissolved gases; and an electronic contamination monitor automatically triggers a water change when necessary to clean the distillation flask. An electronic level monitoring system operates throughout the entire distillation process and automatically switches off the heating in the event of a water shortage; sterilisation is achieved by steaming the condenser section.Three-phase power supply and cooling water supplyDue to its higher heating output, the PD 8 G requires a three-phase connection of 400 volts, 3/N/PE at 50 or 60 hertz; the mains cable terminates in a red CEE plug (IEC 60309, 5-pin, 16 A). The cooling water requirement is 2.4 litres per minute; the pressure differential must be at least 3 bar, and the maximum pressure must not exceed 7 bar. The water cooling inlet and drain are designed for a hose with a 1/2-inch diameter. No storage tank is provided; the mono-distillate drains directly via the hose connection.Typical applicationsSupplying several workstations with high-purity mono-distillate from a central unitSample preparation and quality assurance with higher daily water requirementsResearch and development, where the 4-litre class is no longer sufficientWall-mounted or benchtop installation in laboratories with an existing three-phase power supplySeries overviewWithin the Puridest series, the PD 8 G is the glass version offering the higher of the two available mono performance levels; the smaller Puridest PD 4 G covers the same configuration at 4 litres per hour. Those requiring a lower conductivity of 1.6 µS/cm at 8 litres per hour will find this in the two-stage Puridest PD 8 D. For the 4-litre class with additional bi-distillation, the Puridest PD 4 DG is available. If a stainless steel flask is preferred to a glass one, the Puridest PD 8 R covers the same performance class in stainless steel.Technical detailsProduction capacity8 L/hConductivity of mono-distillate at 25 °C2.2 µS/cmHeating output / max. power consumption6 kWCooling water consumption2.4 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet and drain1/2 inch, hose connectionDimensions (W x D x H)650 x 365 x 390 mmNet weight25 kgGross weight (shipping packaging)31.5 kgPackaging dimensions (L x W x H)0.91 x 0.72 x 0.54 mAmbient temperature range10 to 40 °CMains supply400 V, 3/N/PE, 50/60 HzMains plugCEE plug, red, IEC 60309, 5-pin, 16 AMaterial of distillation flask / condenserDuran borosilicate glass 3.3, heating elements sheathed in quartz glassScope of deliveryLAUDA Puridest PD 8 G, base unit (order number L003019)Mains cable with CEE plug (IEC 60309, 5-pin, 16 A)Accessories required for operation, such as connection hoses for the cooling water supply or a wall bracket, are not included in the scope of delivery.Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected.Due to the three-phase connection, it is worth taking a quick look at the existing electrical installation at the installation site before placing your order. Our procurement service will, on request, compile a list of suitable accessories and spare parts for the Puridest series and also advise on whether, in a specific case, a bi-distillation variant with a lower conductivity value or a stainless steel version of the same performance class would be more appropriate.
LAUDA Hydro H 22 Water Bath, 25 to 100 °C, up to 20.3 L, 225 mm Bath Depth, L002903
Tall measuring cylinders, filled volumetric flasks or vessels that need to be completely submerged require more than just a wide opening; they need depth. The LAUDA Hydro H 22 shares the 400 x 245 millimetre bath opening with the Hydro H 16, but at 225 millimetres rather than 165 millimetres, it is noticeably deeper and can therefore hold up to 20.3 l. The working temperature range is from 25 to 100 °C with a temperature stability of ± 0.1 K.More depth for tall vesselsWith a bath depth of 225 millimetres, even taller vessels can be fully immersed; the bath volume ranges from 7.5 to 20.3 l, depending on the fill level. With a maximum heating output of 1.5 kilowatts, the Hydro H 22 achieves comparable heating performance to the Hydro H 16 despite its larger volume.Digital temperature control with alarm functionsThe TFT colour display shows the actual and setpoint temperatures in °C or °F; settings are adjusted via a membrane keypad in increments of 0.1 °C. A 1-point temperature controller maintains a constant temperature, whilst a timer set in hours and minutes covers three application-specific time functions. Low water level, over- or under-temperature, as well as sensor failure or short circuit, trigger a visual and audible alarm; the trigger points can be set to a maximum of ± 10 K. Electronic function monitoring of the controller runs in the background.Stainless steel bath with insulated lidThe bath body, cover frame, sieve base and heating element are made of stainless steel; the bath vessel has a drain tap. The double-walled, internally domed lid insulates the heat and directs condensation away along the dome, rather than allowing it to drip back into the vessels. The lid and sieve base are included as standard in the scope of delivery.Handling in everyday laboratory useDue to the greater bath depth, changing the water involves a slightly larger volume; however, the drain tap on the bath vessel makes this a simple task without having to tip the bath. Tall vessels can be positioned safely on the sieve base, keeping them at a safe distance from the heating element. With a net weight of 16 kilograms, the Hydro H 22 remains easy for one person to handle, even though it is the heavier of the two models, with a bath opening measuring 400 x 245 millimetres.Typical applicationsComplete immersion of tall measuring cylinders or volumetric flasksTemperature control of larger sample volumes in research and quality assuranceApplications where vessels need to be temperature-controlled over their entire heightChemical process engineering requiring larger volumes than the H 16Selection guide: depth or volume is the deciding factorIf a bath depth of 165 millimetres is sufficient with the same opening, the Hydro H 16, weighing 14 rather than 16 kilograms, is the slightly lighter alternative. For smaller numbers of vessels in confined spaces, the compact Hydro H 8, with its small 245 x 200 millimetre opening, is suitable. If a large number of vessels are required side by side rather than stacked vertically, the Hydro H 24, with its 600 x 245 millimetre wide opening, is better suited to these requirements. For even larger batches with a bath volume of up to 37.9 l and greater depth, the Hydro H 41 is the suitable model in the range.Technical detailsWorking temperature range25 to 100 °CAmbient temperature range10 to 40 °CTemperature stability± 0.1 KMax. heating output1.5 kWBath dimensions (W x D x H)400 x 245 x 225 mmBath volume min. / max.7.5 / 20.3 LOverall dimensions (W x D x H)500 x 440 x 345 mmWeight (net)16 kgMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Scope of deliveryLAUDA Hydro H 22 water bath with drive and control unit, order number L002903Stainless steel lid, double-walled with an inner curveStainless steel sieve baseMains cable with angled Schuko plug (CEE7/7)Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this appliance from the date of delivery. This is subject to registration at lauda.de within three months of delivery. The warranty covers defects in materials and workmanship. Exclusions include, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adapters. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the Hydro H 22, our procurement service can put together suitable accessories on request, such as holders for vessels or spare parts for lids and sieve bases. We are happy to answer any questions regarding the correct bath size or accessory requirements directly.
LAUDA Alpha A 6 Heating Thermostat, 25 to 100 °C, 2.5 to 5.5-litre Bath, L000619
If you only need to control the temperature of small quantities in the laboratory, such as individual samples, test tubes or small flasks, you do not need a large bath volume. The LAUDA Alpha A 6 is the most compact heating thermostat in the Alpha series, featuring its own stainless steel bath vessel with a capacity of 2.5 to 5.5 l and an operating temperature range of 25 to 100 °C.Compact stainless steel bath vesselThe deep-drawn stainless steel bath vessel measures 145 x 161 x 150 millimetres internally and holds between 2.5 and 5.5 l of temperature-control fluid. Measuring 181 x 332 x 370 millimetres, the unit weighs around 7 kilograms and can therefore be accommodated even on a small worktop.Display and controlA single-line LED display shows either the actual or the setpoint value; operation is via three buttons with a simple menu system. The fully electronic, continuous controller maintains the temperature with a stability of ± 0.05 K; the operating temperature range is from 25 to 100 °C, with a permissible ambient temperature between 5 and 40 °C.Safety and circulationLow-level and over-temperature protection monitor operation with non-flammable liquids and signal faults both audibly and visually. The circulation pump delivers up to 15 l per minute at a maximum pressure of 0.2 bar, and its flow rate can be reduced, which helps to prevent excessive turbulence in the temperature-control fluid given the small bath volume. The maximum heating power is 1.5 kilowatts, and the current consumption is 7 amperes.Typical applicationsTemperature control of small sample volumes in test tubes, flasks or beakersViscosity measurements and calibration baths with low liquid volumesTraining and education, where a compact, easy-to-use bath is sufficientWorkstations with limited floor space where a large bath vessel would not fitSecond unit for running parallel experiments alongside a larger bathLarger bath or active coolingIf the bath volume of up to 5.5 l is insufficient, the Alpha A 12 and Alpha A 24, two larger heating thermostats from the same series, are available, with bath volumes of 8 to 12 and 18 to 25 l respectively. If a separate bath vessel is not required because a tank or basin is already available, the Alpha A immersion circulator is the better choice. If the temperature-controlled fluid needs to be cooled to below ambient temperature, the Alpha RA 8 cooling thermostat with compressor cooling is suitable.Technical data according to DIN 12876The technical data for the Alpha A 6 are determined according to DIN 12876, the standard for circulating thermostats and bath thermostats in laboratory and industrial applications. This makes it possible to compare specifications regarding temperature stability, heating power and pump capacity across different manufacturers, which is helpful during audits and interlaboratory tests in quality management.Connection for different mains voltagesThe Alpha A 6 operates as standard at 220 volts at 60 hertz or 230 volts at 50 hertz; it is connected via an angled Schuko plug. For export, variants with 100-volt and 115-volt mains plugs (NEMA5-15P in each case) are also available under a separate order number, which is practical for laboratories with equipment from different regions.Technical detailsOperating temperature range25 to 100 °CAmbient temperature range5 to 40 °CTemperature stability± 0.05 KMax. heating power1.5 kWMax. power consumption1.5 kWCurrent consumption7 AMax. pump pressure0.2 barMax. pump flow rate15 L/minBath volume2.5 to 5.5 LInner dimensions of bath vessel (W x D x H)145 x 161 x 150 mmUnit dimensions (W x D x H)181 x 332 x 370 mmWeight7 kgMains supply220 V; 60 Hz / 230 V; 50 HzMains plugSchuko (CEE7/7), angledStandardTechnical data according to DIN 12876Scope of deliveryLAUDA Alpha A 6 heating thermostat with stainless steel bath vessel, order number L000619Screw terminal (standard accessory)Flow restrictor (standard accessory)Mains cable with angled Schuko plugOperating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this device, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers material and manufacturing defects. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.A matching bath lid, a cooling coil set and a pump connection set are available as accessories for the Alpha A 6. We will, on request, source these accessories as well as spare parts for the unit.
LAUDA Microcool MC 350 Recirculating Chiller, -10 to 40 °C, 350 Watts Cooling Capacity, L004112
Anyone looking for an external cooling source for their laboratory bench that does not take up much space will find the LAUDA Microcool MC 350 to be a compact recirculating chiller with a cooling capacity of 350 watts at 20 °C. The unit covers an operating temperature range of -10 to 40 °C and uses the natural refrigerant R-600a, a hydrocarbon, for cooling. Unlike the larger models in the Microcool range, the MC 350 is designed to be placed directly on the laboratory bench, rather than on the floor.Compact for the laboratory benchMeasuring 240 x 400 x 500 millimetres and weighing 30 kilograms, the MC 350 fits even where no additional floor space is available. A 1-line LED display shows the actual or setpoint value; operation is via three buttons with fully electronic control. The sound pressure level is 60 dB(A), whilst the power consumption is a maximum of 0.5 kilowatts. An illuminated level indicator with a low-level alarm and winding temperature monitoring for the pump are designed to ensure continuous, unattended operation.Cooling capacity across the temperature rangeThe cooling capacity of the MC 350 decreases as the setpoint temperature falls: at 20 °C, the unit delivers 0.35 kilowatts; at 10 °C, 0.27 kilowatts; at 0 °C, 0.2 kilowatts; and at minus 10 °C, 0.12 kilowatts. The magnetically coupled block pump delivers up to 16 l per minute at a maximum pressure of 0.4 bar via connections with an external diameter of 10 millimetres. An auto-start timer and an auto-shutdown function allow for automated operation without the need for manual switching on and off.Installation and mains connectionThe MC 350 operates on a mains supply of 220 volts at 60 hertz or 230 volts at 50 hertz, thus covering the standard mains voltages in Europe and other regions. A mains cable with an angled Schuko plug is supplied as standard. For export, LAUDA lists further plug variants, for example for North America or the UK, each with its own order number. As with the larger models in the range, the ambient temperature range is 5 to 40 °C.Typical applicationsAs an external cooling source on the laboratory bench, the MC 350 is suitable for the following tasks, amongst others:Cooling of rotary evaporators and condensersTemperature control of reaction vessels and double-jacketed containers on a smaller scaleCooling of measuring instruments and detectors with limited cooling requirementsContinuous operation where no floor space is availableSelection guide within the Microcool rangeIf the cooling capacity of the MC 350 is insufficient for the external circuit, the floor-standing models LAUDA Microcool MC 600 and LAUDA Microcool MC 1200 offer significantly greater cooling capacity whilst operating on the same principle. If a heating function is also required in the same circuit, the compressor-based LAUDA Alpha RA 8 and LAUDA Alpha RA 12 cooling thermostats are the more suitable choice.Technical detailsOperating temperature range-10 to 40 °CAmbient temperature range5 to 40 °CTemperature stability± 0.5 KCooling capacity at 20 °C (ethanol)0.35 kWCooling capacity at 10 °C (ethanol)0.27 kWCooling capacity at 0 °C (ethanol)0.2 kWCooling capacity at -10 °C (ethanol)0.12 kWInlet/outlet connection10 mm outer diameterFilling volume min. / max.4 / 7 LPump flow rate, max.16 L/minMax. pump pressure0.4 barDimensions (W x D x H)240 x 400 x 500 mmWeight30 kgSound pressure level60 dB(A)Max. power consumption0.5 kWMains supply220 V; 60 Hz / 230 V; 50 HzMains plugMains cable with angled Schuko plug (CEE7/7)RefrigerantR-600a, 0.048 kgStandardDIN 12876Scope of deliveryLAUDA Microcool MC 350 recirculating chiller, order number L004112Mains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.The appliance operates using the natural refrigerant R-600a, with a charge of 0.048 kg and a GWP of 3, which, according to the data sheet, corresponds to a CO2 equivalent of approximately 0.0 tonnes. As a hydrocarbon refrigerant, R-600a is not covered by Regulation (EU) 2024/573 on certain fluorinated greenhouse gases.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of original LAUDA temperature control fluids. The warranty covers defects in materials and workmanship. Excluded are, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.An EPDM hose is available as an accessory for the MC 350’s connections. Our procurement service also puts together a selection of suitable temperature control fluids and other accessories for the unit.
LAUDA Hydro H 41 Water Bath, 25 to 100 °C, up to 37.9 L, 335 mm Bath Depth, L002905
Large round-bottom flasks, several tall measuring cylinders in use at the same time, or an experiment that simply requires more water around it will quickly exceed the capacity of the smaller Hydro models. With a bath volume of 9.3 to 37.9 l, the LAUDA Hydro H 41 is the largest model in the series and has a bath measuring 410 x 296 x 335 millimetres. As with the smaller models, the working temperature range is from 25 to 100 °C with a temperature stability of ± 0.1 K.Large bath for large batchesWith a bath depth of 335 millimetres, even tall vessels can be fully submerged, whilst the base area of 410 x 296 millimetres provides space for several large flasks or cylinders side by side. With a maximum heating output of 1.5 kilowatts, the larger water volume takes slightly longer to reach the set temperature than with the smaller models; however, the temperature remains constant throughout the entire batch.Digital control even for large volumesA TFT colour display shows the actual and setpoint values in °C or °F; settings are adjusted via a membrane keypad in increments of 0.1 °C. The 1-point temperature controller is accompanied by an electronic function monitoring system, whilst a timer covers three application-specific time functions in hours and minutes. In the event of low water level, over- or under-temperature, or in the event of a sensor break or short circuit, the unit triggers a visual and audible alarm; the trigger points can be set up to ± 10 K, which is particularly useful with this larger bath volume as it allows temperature deviations to be detected at an early stage.Solid construction made from stainless steelThe bath body, cover frame, sieve base and heating element are made of stainless steel; a drain tap facilitates water changes in this larger-volume unit. The double-walled, internally domed lid insulates the heat and channels condensation away along the dome rather than allowing it to drip back into the vessels. The lid and sieve base are included as standard in the scope of delivery.Handling in everyday laboratory useWith a filling volume of almost 38 l, a nearby water supply is helpful to avoid the hassle of filling the bath from a canister. The drain tap then ensures controlled drainage. With a net weight of 22 kilograms, a fixed location on a sturdy laboratory bench is advisable; given this volume, moving the unit whilst in operation is not intended anyway.Typical applicationsTemperature control of large round-bottom flasks or several tall measuring cylinders simultaneouslyProcesses involving larger sample volumes in chemical process engineeringApplications in which vessels are fully immersed over considerable heightsLaboratory work involving varying batches, some of which are large in volumeSelection guide: is a smaller model sufficient?For smaller batches with just a few vessels, the compact Hydro H 8 is the more economical choice. If all that is required is greater width to accommodate several vessels side by side with a shallower depth, the Hydro H 16 and the Hydro H 22, with bath volumes of 7.5 to 20.3 l, are better suited to your needs. If width is primarily required to accommodate many vessels in a row, without the additional depth of the H 41, the Hydro H 24, with a bath opening of 600 x 245 millimetres, is a better fit. The Hydro H 41 remains the model with the largest capacity within the series.Technical detailsWorking temperature range25 to 100 °CAmbient temperature range10 to 40 °CTemperature stability± 0.1 KMax. heating output1.5 kWBath dimensions (W x D x H)410 x 296 x 335 mmBath volume min. / max.9.3 / 37.9 LOverall dimensions (W x D x H)510 x 490 x 476 mmWeight (net)22 kgMains supply230 V, 50/60 HzMains plugMains cable with angled Schuko plug (CEE7/7)Scope of deliveryLAUDA Hydro H 41 water bath with drive and control unit, order number L002905Stainless steel lid, double-walled with an inner curveStainless steel sieve baseMains cable with angled Schuko plug (CEE7/7)Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this appliance from the date of delivery. This is subject to registration at lauda.de within three months of delivery. The warranty covers defects in materials and workmanship. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adapters. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the Hydro H 41, our procurement service can put together suitable accessories on request, such as holders for vessels or spare parts for lids and sieve bases. We are happy to answer any questions regarding the correct bath size or accessory requirements directly.
LAUDA Puridest PD 12 R Mono Distillation Apparatus, 12 L/h, 24-litre Storage Tank, L003016
With a capacity of 12 l of distillate per hour, the LAUDA Puridest PD 12 R is the most powerful model in the Mono series; the distillate is stored in a built-in 24-litre tank. Here too, the conductivity is 2.3 µS/cm at 25 °C, which is pure enough for reagent dilution and sample preparation according to DAB regulations and international pharmacopoeia standards. As its output is significantly higher than that of the PD 8 R, the PD 12 R requires the same three-phase power supply, but also the highest cooling water consumption in the entire range.24-litre storage tank for high continuous demandThe 24-litre tank is sufficient for laboratories with a consistently high demand for water, for example when several autoclaves or workstations are being supplied simultaneously, as the supply here also covers twice the hourly output. Water is dispensed via a tap with a continuous or momentary setting, whilst an electronic level sensor in the background controls replenishment. The condenser is part of the storage tank and can be replaced if necessary; a solenoid valve regulates the water supply.Three-phase connection and cooling water requirementsLike the PD 8 R, the PD 12 R is connected via a red, five-pin CEE plug according to IEC 60309, rated at 16 amps at 400 volts three-phase current. The heating output increases to a maximum of 9 kilowatts; accordingly, the cooling water requirement is also higher at 3.3 l per minute, the highest figure in the Puridest Mono series. On the pressure side, the same limits apply as for the PD 8 R: 3 to 7 bar, with a 1/2-inch inlet and a 3/4-inch drain.Robustly built for continuous operationThe PD 12 R has a net weight of 40 kilograms and a packed weight of 47.36 kilograms, with a footprint of 780 x 410 millimetres, which is exactly the same as that of the PD 8 R. Only the height of the housing increases to 670 millimetres, as the larger storage tank requires more space. The tubular heating elements, distillation flask, storage tank and condenser are made of stainless steel, whilst the double-walled housing is made of galvanised, powder-coated sheet steel. A built-in sensor system also detects contamination in the distillation flask and stops the distillation process before water quality is compromised.Typical applicationsCentral distillate supply for institutes, departments or multiple autoclavesHigh, continuous daily demand in research and quality assuranceFacilities with an existing three-phase power supply and an adequate cooling water supplyReplacement of several smaller distillation units with a single central unitWhich Puridest model is suitableIf a smaller supply is sufficient, the Puridest PD 8 R delivers 8 l per hour with a 16-litre storage tank and lower cooling water consumption; the Puridest PD 4 R is sufficient for 4 l per hour and can be powered from a standard Schuko socket. If a higher purity is required instead of mono-distillate, the Puridest PD 4 D and the Puridest PD 4 DG feature an additional bi-distillation stage.Technical detailsProduction capacity12 L/hConductivity of mono-distillate at 25 °C2.3 µS/cmTank capacity24 LMax. heating output9 kWMax. power consumption9 kWCooling water consumption3.3 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet1/2-inch hose connectionWater cooling drain3/4-inch hose connectionDimensions (W x D x H)780 x 410 x 670 mmNet weight40 kgGross weight (including shipping packaging)47.36 kgPackaging dimensions (L x W x H)1.0 x 0.81 x 0.63 mAmbient temperature range10 to 40 °CMains supply400 V, 3/N/PE, 50/60 HzMains plugMains cable with plug according to IEC 60309, 5-pin, CEE, red, 16 AStorage tank24 L, integrated, wall- or table-mountedMaterial of distillation flask/condenser/storage tankStainless steelScope of deliveryLAUDA Puridest PD 12 R distillation unit with integrated storage tank, order number L003016Mains cable with CEE plug (IEC 60309)Wall bracket, cooling water hoses and connection fittings are not included in the scope of delivery and must be procured separately.Regulatory informationThis appliance is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected by this.For the PD 12 R, wall brackets, cooling water hoses, connection fittings and spare parts such as condensers or distillation flasks may be required. We will, on request, compile the appropriate accessories and spare parts for the respective Puridest model, including for upgrading to a smaller model or a version with bi-distillation.
LAUDA Alpha A 12 Heating Thermostat, 25 to 100 °C, 8 to 12-litre Bath, L000620
For day-to-day laboratory work involving several samples or larger vessels at the same time, a bath designed for individual test tubes is often insufficient. With a bath volume of 8 to 12 l, the LAUDA Alpha A 12 falls squarely within the mid-range size category of the Alpha heating thermostats and covers the operating temperature range from 25 to 100 °C.Bath vessel for multiple samples simultaneouslyThe stainless steel bath vessel measures 235 x 161 x 200 millimetres internally and holds between 8 and 12 l of temperature-control fluid, enough space to immerse several beakers, flasks or a sample rack at the same time. The complete unit measures 270 x 332 x 420 millimetres and weighs approximately 8 kilograms.Display and controlOperation is via three buttons and a clear menu system; a single-line LED display shows the actual or setpoint value. The fully electronic, continuous controller maintains the temperature with a stability of ± 0.05 K across the entire operating temperature range of 25 to 100 °C, at a permissible ambient temperature of between 5 and 40 °C.Circulation and safety featuresThe circulation pump delivers up to 15 l per minute at a maximum pressure of 0.2 bar and ensures even temperature distribution for bath volumes of 8 to 12 l; the flow rate can be reduced if required. A low-level and an over-temperature protection system monitor operation with non-flammable liquids and signal faults both audibly and visually. The maximum heating power is 1.5 kilowatts, and the current consumption is 7 amperes.Typical applicationsSimultaneous temperature control of several samples, flasks or beakers in the same bathViscosity and density measurements at a constant bath temperatureMaterial testing in which test specimens are kept at a constant temperature for extended periodsRoutine laboratory work in quality control and research with medium sample throughputCalibration work where several test specimens require the same bath temperatureSmaller or larger bathIf the bath volume of 8 to 12 l is insufficient, the Alpha A 24, with a capacity of 18 to 25 l, accommodates significantly larger batches. For smaller sample volumes, the more compact Alpha A 6, with a capacity of 2.5 to 5.5 l, is often sufficient. If you already have your own bath vessel, the Alpha A immersion circulator can be used instead. If the bath needs to be actively cooled below ambient temperature, the Alpha RA 12 refrigeration thermostat with compressor cooling is the suitable alternative.Technical data according to DIN 12876The technical data for the Alpha A 12 are determined according to DIN 12876, the standard for circulating thermostats and bath thermostats in laboratory and industrial applications. This makes it possible to compare specifications regarding temperature stability, heating power and pump capacity across different manufacturers, which is helpful for audits and interlaboratory tests in quality management.Connection for different mains voltagesThe Alpha A 12 operates as standard at 220 volts at 60 hertz or 230 volts at 50 hertz; it is connected via an angled Schuko plug. A version with a 115-volt mains plug (NEMA5-15P) is also available for export under a separate order number.Technical detailsOperating temperature range25 to 100 °CAmbient temperature range5 to 40 °CTemperature stability± 0.05 KMax. heating power1.5 kWMax. power consumption1.5 kWCurrent consumption7 AMax. pump pressure0.2 barMax. pump flow rate15 L/minBath volume8 to 12 LInner bath vessel (W x D x H)235 x 161 x 200 mmUnit dimensions (W x D x H)270 x 332 x 420 mmWeight8 kgMains supply220 V; 60 Hz / 230 V; 50 HzMains plugSchuko (CEE7/7), angledStandardTechnical data according to DIN 12876Scope of deliveryLAUDA Alpha A 12 heating thermostat with stainless steel bath vessel, order number L000620Screw terminal (standard accessory)Flow restrictor (standard accessory)Mains cable with angled Schuko plugOperating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this device, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers material and manufacturing defects. Exclusions include, amongst others, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.Accessories for the Alpha A 12 include a matching bath lid, a cooling coil set and a pump connection set. We will compile the appropriate accessories and spare parts for the unit on request.
LAUDA Puridest PD 4 D Double-Distillation Unit, 4 L/h, Conductivity 1.6 µS/cm, L003021
For applications where a simple single-stage distillate is not pure enough, such as in the preparation of cell or tissue cultures, the Puridest PD 4 D distils the water in two stages. The bi-distillation unit reduces the conductivity of the final product from 2.2 µS/cm after the first stage to 1.6 µS/cm after the second stage and delivers up to 4 litres of bi-distillate per hour. The first stage is made of stainless steel, whilst the second stage is made of Duran borosilicate glass 3.3.Two distillation stages for lower conductivityIn the PD 4 D, the first distillation stage is followed by a second distillation stage, which further reduces the conductivity. A main switch with indicator lights shows the status of both stages. The mono-distillate can be collected separately via a borosilicate glass stopcock fitted with a PTFE plug; the finished bi-distillate drains freely through a borosilicate glass dust-proof bell, no storage tank is provided for this purpose. An electronic contamination monitoring system for the distillation flask stops the distillation if necessary and displays a visual cleaning prompt; an electronic level monitoring system operates throughout the entire process.Material combination and safetyThe tubular heating elements and the first-stage distillation flask are made of stainless steel; the second-stage condenser is made of Duran borosilicate glass 3.3, including a splash guard. A dual low-water protection system comprising a float switch and a thermostatic over-temperature protection switch provides additional safety for the unit. The double-walled housing, made of galvanised, powder-coated sheet steel, accommodates the connections for three-phase power and cooling water: 400 volts, 3/N/PE at 50 or 60 hertz, 2 litres of cooling water per minute at a pressure differential of at least 3 and at most 7 bar.Typical applicationsBacteriological and medical sample preparationPreparation of cell and tissue cultures with high purity requirementsCleaning and sterilisation processes in the laboratoryPreparation of buffer solutions in quality assurance, development and researchSeries overviewThe bi-distillation units in the Puridest range comprise the PD 4 D, the PD 4 DG and the PD 8 D, with capacities ranging from 4 to 8 litres per hour. For those who, within the same performance class, prefer both stages to be made of glass rather than a combination of stainless steel and glass, this is available in the Puridest PD 4 DG. For a higher throughput at the same conductivity, the Puridest PD 8 D is available with a capacity of 8 litres per hour. If a simple single-stage distillate is sufficient, the Puridest PD 4 G covers the same performance class without a second distillation stage, whilst the Puridest PD 4 R offers the same single-stage performance in a stainless steel version.Technical detailsProduction capacity (bi-distillate)4 L/hConductivity of mono-distillate at 25 °C2.2 µS/cmConductivity of bi-distillate at 25 °C1.6 µS/cmHeating power / maximum power consumption7 kWCooling water consumption2 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet1/2 inch, hose connectionDimensions (W x D x H)550 x 280 x 570 mmNet weight28 kgGross weight (shipping packaging)41.1 kgPackaging dimensions (L x W x H)0.7 x 0.72 x 0.4 mAmbient temperature range10 to 40 °CMains supply400 V, 3/N/PE, 50/60 HzMains plugCEE plug, red, IEC 60309, 5-pin, 16 AMaterial, 1st stage / 2nd stageStainless steel (Mono) / Duran borosilicate glass 3.3 (Bi)Scope of deliveryLAUDA Puridest PD 4 D, base unit (order number L003021)Mains cable with CEE plug (IEC 60309, 5-pin, 16 A)Accessories required for operation, such as connection hoses for the cooling water supply or collection vessels for the bi-distillate, are not included in the Scope of delivery.Regulatory informationThis unit is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected.As the bi-distillate from the PD 4 D drains freely and does not have its own storage tank, it is worth ordering a suitable collection vessel at the same time. Our procurement service can, on request, compile a list of suitable accessories and spare parts for the Puridest series and also advise on whether, in a specific case, the all-glass PD 4 DG or the PD 4 G mono model is the more suitable option.
LAUDA Alpha RA 24 Cooling Thermostat, -25 to 100 °C, 14 to 22-litre Bath, L000640
When an external reactor, a long length of tubing or several loads need to be cooled simultaneously, it is not just the temperature but, above all, the bath volume that matters. With a capacity of 14 to 22 l, the LAUDA Alpha RA 24 is the largest model in the Alpha range of cooling thermostats and covers the same operating temperature range of -25 to 100 °C as the RA 8 and the RA 12.Cooling capacity for higher loadsAt 20 °C, the RA 24 delivers 0.425 kW of cooling capacity with ethanol as the bath medium; at 0 °C, 0.33 kW; at -20 °C 0.08 kW. At 20 °C and 0 °C it therefore exceeds the RA 12 (0.325 kW and 0.26 kW respectively), at -20 °C it is lower (0.1 kW). As with the smaller models, the maximum heating power is 1.5 kW, the maximum power consumption is 1.8 kW, and the current consumption is 8 A.Large stainless steel bathThe bath vessel measures 350 x 277 x 160 mm internally and has a capacity of 14 to 22 l, sufficient for several reaction vessels or a longer cooling coil at the same time. The complete unit weighs 43 kg and measures 415 x 605 x 605 mm (W x D x H); the bath lid, pump connection set and short-circuit hose are included in the Scope of delivery.Pump and external connectionsThe circulation pump delivers up to 15 L/min at a maximum of 0.2 bar, which is sufficient for external loads with moderate pressure loss. If this is no longer sufficient for a larger external system or several loads connected simultaneously, a separate recirculating cooler such as the LAUDA Microcool MC 350 supplements the cooling capacity.Safety and controlA fully electronic, continuous controller maintains temperature stability to within ± 0.05 K, whilst a 1-line LED display shows the current value. Low-level and overtemperature protection with audible and visual alarms, as well as an automatic compressor control, are also standard features on the RA 24.Typical applicationsCooling of external reactors and plant components requiring a higher volumeSimultaneous temperature control of multiple sample series in research and industryMaterial testing and cold tests across the entire range from -25 to 100 °CUse as a central cooling bath in laboratories with varying, larger consumersSelection guide within the Alpha seriesIf the bath volume of the RA 24 is insufficient for the planned setup, the smaller LAUDA Alpha RA 8 (5.0 to 7.5 l) and the medium-sized LAUDA Alpha RA 12 (9.5 to 14.5 l) are suitable alternatives from the same series. If no active cooling is required at all, the LAUDA Alpha A 24 heating thermostat of the same size covers the same temperature range without a compressor.Technical detailsOperating temperature range-25 to 100 °CAmbient temperature range5 to 40 °CTemperature stability± 0.05 KBath volume min. / max.14.0 / 22.0 LBath dimensions (W x D x H)350 x 277 x 160 mmOverall dimensions (W x D x H)415 x 605 x 605 mmWeight43 kgMax. heating power1.5 kWCooling capacity at 20 °C (ethanol)0.425 kWCooling capacity at 0 °C (ethanol)0.33 kWCooling capacity at -20 °C (ethanol)0.08 kWMax. power consumption1.8 kWCurrent consumption8 AMax. pump flow rate15 L/minMax. pump pressure0.2 barMains supply220 V; 60 Hz / 230 V; 50 HzMains plugMains cable with angled Schuko plug (CEE7/7)RefrigerantR-134a, 0.170 kgStandardDIN 12876Scope of deliveryLAUDA Alpha RA 24 cooling thermostat with stainless steel bath vessel, order number L000640Bath lidPump connection setShort-circuit hose for pump connectionsMains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.The device uses the refrigerant R-134a, with a charge of 0.170 kg and a GWP of 1430, which corresponds to a CO2 equivalent of approximately 0.2 tonnes. The LAUDA data sheet relates this value to Regulation (EU) 2024/573 on certain fluorinated greenhouse gases.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit, effective from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers defects in materials and workmanship. Excluded are, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.For the RA 24, our procurement service can, if required, put together a selection of suitable accessories, such as a larger quantity of temperature-control fluid for the larger bath volume, an additional storage tank or hoses for multiple external connections. We can also request spare parts from the manufacturer on your behalf.
LAUDA Microcool MC 1200 Recirculating Chiller, -10 to 40 °C, 1,200 Watts Cooling Capacity, L004461
If several loads need to be supplied simultaneously on a single circuit, or if the heat input from a single load is high, the LAUDA Microcool MC 1200 is the most powerful model in the Microcool range: 1,200 watts of cooling capacity at 20 °C, operating temperature range -10 to 40 °C, natural refrigerant R-290. Measuring 450 x 550 x 650 millimetres and weighing 63 kilograms, a permanent installation space on the floor or under a table must be provided; the unit is too large to be placed on a laboratory bench.Cooling capacity and circulationAt 40 °C with a water-glycol mixture and at 20 °C with ethanol, the MC 1200 achieves a cooling capacity of 1.2 kilowatts in each case. As the setpoint temperature decreases, the capacity decreases: 1.05 kilowatts at 10 °C, 0.75 kilowatts at 0 °C, 0.4 kilowatts at minus 10 °C. Circulation is provided by a magnetically coupled block pump, connected via a G 3/4-inch thread. The circuit’s fill volume is between 7 and 14 l, depending on the external pipe volume of the connected load.Display, safety and automatic controlThe actual and setpoint values are shown on a 1-line LED display; control is fully electronic and continuous. An illuminated liquid level indicator with a low-level alarm protects against dry running, whilst winding temperature monitoring protects against pump overload. An auto-start timer and an auto-shut-down function ensure unattended operation, meaning the unit can be switched on and off at fixed times. With a sound pressure level of 59 dB(A), a power consumption of 0.82 kilowatts and a current consumption of 4.2 amperes, the MC 1200 falls within the typical range for this cooling capacity.Mains connection and maintenanceThe unit is connected to the mains at 230 volts at 50 hertz via a power cable with an angled Schuko plug. If a different plug type is required, for example for the UK or North America, LAUDA offers these under a separate order number within the same product range. The unit is filled from the top and drained via a connection on the rear of the unit, which is convenient when changing the coolant or servicing the pump.Typical applicationsWith a cooling capacity of 1,200 watts, the MC 1200 is suitable for applications where several loads are connected to a single circuit or where a single load generates a significant amount of heat:Centralised cooling supply for several rotary evaporators or condensers on a single circuitCooling of reactors with high reaction heat during continuous operationReplacement of several smaller individual coolers with a single central unitLaboratory operations with continuous cooling requirements throughout the daySelection guide for the Microcool rangeIf the cooling requirement is lower, the LAUDA Microcool MC 600 with 600 watts is sufficient, or, for the laboratory bench, the compact LAUDA Microcool MC 350. If the same circuit also needs to be heated, the compressor-based LAUDA Alpha RA 12 and LAUDA Alpha RA 24 cooling thermostats are the more technically suitable solution.Technical detailsOperating temperature range-10 to 40 °CAmbient temperature range5 to 40 °CTemperature stability± 0.5 KCooling capacity at 40 °C (water-glycol)1.2 kWCooling capacity at 20 °C (ethanol)1.2 kWCooling capacity at 10 °C (ethanol)1.05 kWCooling capacity at 0 °C (ethanol)0.75 kWCooling capacity at -10 °C (ethanol)0.4 kWInlet/outlet connectionG 3/4 inchFilling volume min. / max.7 / 14 LPump flow rate, max.35 L/minMax. pump pressure1.3 barDimensions (W x D x H)450 x 550 x 650 mmWeight63 kgSound pressure level59 dB(A)Max. power consumption0.82 kWCurrent consumption4.2 AMains supply230 V; 50 HzMains plugMains cable with angled Schuko plug (CEE7/7)RefrigerantR-290, 0.085 kgStandardDIN 12876Scope of deliveryLAUDA Microcool MC 1200 recirculating chiller, order number L004461Mains cable with angled Schuko plug (CEE7/7)Operating instructions as a PDF downloadRegulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.The appliance operates using the natural refrigerant R-290, with a charge of 0.085 kg and a GWP of 3, which, according to the data sheet, corresponds to a CO2 equivalent of approximately 0.0 tonnes. As a hydrocarbon refrigerant, R-290 is not covered by Regulation (EU) 2024/573 on certain fluorinated greenhouse gases.Warranty and procurement serviceLAUDA DR. R. WOBSER GMBH & CO. KG, Lauda-Königshofen, offers end customers a 5-year ‘Best’ warranty on this unit from the date of delivery. This is subject to registration at lauda.de within three months of delivery and the use of genuine LAUDA temperature control fluids. The warranty covers defects in materials and workmanship. Excluded are, amongst other things, wear parts such as filters and seals, damage caused during transport, damage resulting from unauthorised tampering, as well as cables, plugs, hoses and adaptors. LAUDA’s warranty terms and conditions (as at 03/2025) apply. Your statutory warranty rights remain unaffected.Accessories available for the MC 1200 include a fabric-reinforced EPDM hose. If required, our procurement service can source additional accessories and spare parts for the unit.
LAUDA Puridest PD 8 D Double-Distillation Unit, 8 L/h, Conductivity 1.6 µS/cm, L003022
If a laboratory requires larger quantities of low-conductivity bi-distillate, for example, for the simultaneous preparation of several cell culture batches, the PD 8 D is the higher-performance model within the two-stage Puridest range. It delivers up to 8 litres of bi-distillate per hour with a conductivity of 1.6 µS/cm after the second stage. As with the smaller model, the first stage is made of stainless steel, whilst the second stage is made of Duran borosilicate glass 3.3.Higher throughput whilst retaining the two-stage designTo achieve double the throughput of the PD 4 D, the PD 8 D operates with a heating power of 11.5 kilowatts. The operating principle remains the same: a main switch with indicator lights shows the status of both distillation stages; the mono-distillate from the first stage can be collected separately via a borosilicate glass stopcock with a PTFE plug, and the finished bi-distillate flows freely through a borosilicate glass dust protection bell. An electronic contamination monitoring system for the distillation flask stops the distillation if necessary and displays a visual cleaning prompt; an electronic level monitoring system monitors the entire process.Connected load specifications and cooling water requirementsThe PD 8 D requires a three-phase power supply of 400 volts, 3/N/PE at 50 or 60 hertz, connected via a red CEE plug (IEC 60309, 5-pin, 16 A). Cooling water consumption is 3.3 litres per minute; the pressure differential must be at least 3 bar and must not exceed 7 bar. The tubular heating elements and the first-stage distillation flask are made of stainless steel, whilst the second-stage condenser is made of Duran borosilicate glass 3.3 with a splash guard, protected by a dual low-water safety system comprising a float switch and a thermostatic over-temperature protection switch.Installation and weightMeasuring 700 x 390 x 700 millimetres and weighing 48 kilograms net, the PD 8 D requires significantly more installation space than the smaller PD 4 D. The double-walled housing, made of galvanised, powder-coated sheet steel, is suitable for both wall mounting and placement on a sturdy laboratory bench, provided that the supply lines for three-phase current and cooling water are already in place at the intended location. For dispatch, a gross weight of 54 kilograms is to be expected, with packaging dimensions of 0.85 x 0.86 x 0.57 metres.Typical applicationsBacteriological and medical sample preparation with higher daily requirementsParallel preparation of multiple cell and tissue culture batchesCleaning and sterilisation processes in the laboratoryPreparation of buffer solutions in quality assurance, development and researchSeries overviewWithin the two-stage Puridest range, the PD 8 D is the higher-performance variant compared to the Puridest PD 4 D, which has a capacity of 4 litres per hour. For those who do not require a second distillation stage at 8 litres per hour, the Puridest PD 8 G offers the same performance class as a pure single-stage glass distillation unit. If you are looking for a fully glass-constructed unit with two stages but at a lower capacity, this is covered by the Puridest PD 4 DG. For a stainless steel version in the same single-stage performance class, the Puridest PD 8 R is available.Technical detailsProduction capacity (bi-distillate)8 L/hConductivity of mono-distillate at 25 °C2.2 µS/cmConductivity of bi-distillate at 25 °C1.6 µS/cmHeating power / maximum power consumption11.5 kWCooling water consumption3.3 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet1/2 inch, hose connectionDimensions (W x D x H)700 x 390 x 700 mmNet weight48 kgGross weight (including packaging)54 kgPackaging dimensions (L x W x H)0.85 x 0.86 x 0.57 mAmbient temperature range10 to 40 °CMains supply400 V, 3/N/PE, 50/60 HzMains plugCEE plug, red, IEC 60309, 5-pin, 16 AMaterial, 1st stage / 2nd stageStainless steel (Mono) / Duran borosilicate glass 3.3 (Bi)Scope of deliveryLAUDA Puridest PD 8 D, base unit (order number L003022)Mains cable with CEE plug (IEC 60309, 5-pin, 16 A)Accessories required for operation, such as connection hoses for the cooling water supply or collection vessels for the bi-distillate, are not included in the Scope of delivery.Regulatory informationThe unit is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this appliance from the date of purchase. Your statutory warranty rights remain unaffected.Given the net weight of 48 kilograms and the three-phase power connection, it is worth checking the installation space and electrical installation at the site of use before placing your order. Our procurement service can, on request, put together suitable accessories and spare parts for the Puridest series and also advise on whether the smaller PD 4 D or a pure mono version is sufficient for your specific requirements.
LAUDA Puridest PD 4 DG Glass Double-Distillation Unit, 4 L/h, Conductivity 1.6 µS/cm, L003024
Anyone wishing to combine the advantages of glass distillation, namely the visible process and the absence of stainless steel in the water path, with a lower conductivity will find the Puridest PD 4 DG to be the suitable version. This bi-distillation unit features both distillation stages constructed entirely from Duran borosilicate glass 3.3, thereby achieving a conductivity of 1.6 µS/cm at a rate of 4 litres of bi-distillate per hour. The heating elements are sheathed in quartz glass.Two distillation stages made entirely of glassUnlike the PD 4 D, which uses stainless steel in the first stage, the entire water path in the PD 4 DG runs through glass. Raw water is fed into the first distillation flask via a solenoid valve, where it is heated and condensed in a drip-proof condenser section before the second stage further reduces the conductivity. A CO₂ degassing port on the condenser and an electronic contamination monitor, which automatically triggers a water change for cleaning, ensure low-maintenance operation. Sterilisation is achieved by steaming the condenser sections; the process remains visible at all times through the shatterproof front pane.Connection and cooling water requirementsThe PD 4 DG requires a three-phase connection with 400 volts, 3/N/PE at 50 or 60 hertz, and draws a maximum of 5.8 kilowatts; the mains cable terminates in a red CEE plug (IEC 60309, 5-pin, 16 A). Cooling water consumption is 2.4 litres per minute; the pressure differential must be at least 3 bar and must not exceed 7 bar. The water cooling inlet and drain are designed for a 1/2-inch diameter hose. The unit does not have a storage tank; the finished bi-distillate drains via the hose connection on the right-hand side of the unit.Typical applicationsBacteriological and medical sample preparation requiring a continuously visible processPreparation of cell and tissue cultures with high purity requirementsCleaning and sterilisation processes in the laboratoryProduction of buffer solutions in quality assurance, development and research, where contact with stainless steel in the water path is to be avoidedSeries overviewWithin the two-stage Puridest models, the PD 4 DG is the only version in which both stages are made entirely of glass; the Puridest PD 4 D achieves the same conductivity of 1.6 µS/cm with a first stage made of stainless steel. For a higher throughput at the same conductivity, the Puridest PD 8 D is available with a capacity of 8 litres per hour. If a simple single-stage distillate is sufficient, the Puridest PD 4 G covers the same performance class without a second distillation stage, whilst the Puridest PD 4 R offers the same single-stage performance in a stainless steel version.Technical detailsProduction capacity (bi-distillate)4 L/hConductivity of mono-distillate at 25 °C2.2 µS/cmConductivity of bi-distillate at 25 °C1.6 µS/cmHeating power / maximum power consumption5.8 kWCooling water consumption2.4 L/minMinimum cooling water pressure differential3 barMaximum cooling water pressure7 barWater cooling inlet and drain1/2 inch, hose connectionDimensions (W x D x H)650 x 365 x 390 mmNet weight28 kgGross weight (including packaging)31.5 kgPackaging dimensions (L x W x H)0.92 x 0.72 x 0.55 mAmbient temperature range10 to 40 °CMains supply400 V, 3/N/PE, 50/60 HzMains plugCEE plug, red, IEC 60309, 5-pin, 16 AMaterial of distillation flasks / condensersDuran borosilicate glass 3.3, heating elements sheathed in quartz glassScope of deliveryLAUDA Puridest PD 4 DG, base unit (order number L003024)Mains cable with CEE plug (IEC 60309, 5-pin, 16 A)Accessories required for operation, such as connection hoses for the cooling water supply or a wall bracket, are not included in the Scope of delivery.Regulatory informationThis unit is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, LAUDA DR. R. WOBSER GMBH & CO. KG, is DE 66424057. Information on the return of old appliances can be found on our Environment and Disposal page.Warranty and procurement serviceLAUDA provides a standard 12-month manufacturer’s warranty on this device from the date of purchase. Your statutory warranty rights remain unaffected.Anyone who has previously used the PD 4 D and wishes to switch to a fully glass-bodied model will find the PD 4 DG to be the appropriate alternative, with the same conductivity value. Our procurement service will, on request, compile a list of suitable accessories and spare parts for the Puridest series and also advise on whether the 8-litre class or a pure mono version is more appropriate for your specific requirements.