Holding clamp for the hole grid of the holding basket
For WTB15, WTB24, WTB35 and WTB50
Clamps for further flask sizes are also available
ⓘ This product description has been translated from German using AI. Despite careful review, we do not guarantee that the translation is error-free; in case of doubt, the German version shall prevail.
Product information "Memmert flask clamp B66306 for 200 ml flasks, for WTB15, WTB24, WTB35 and WTB50"
B66306 is the clamp for flasks of 200 ml. The hole grid of the holding basket takes the holding clamps for Erlenmeyer flasks. The clamp fits the WTB15, WTB24, WTB35 and WTB50 water baths.
Memmert states the maximum number of flasks in a drawing, which is available on request. The holding basket is available in two sizes: B66308 for WTB15 and WTB24, B66309 for WTB35 and WTB50. Clamps for 100 ml (B66305), 300 ml (B66307) and 500 ml (B66310) are also available.
Typical applications
Typical uses of the WTB15, WTB24, WTB35 and WTB50 water baths:
The Memmert water bath WTB15 belongs to Memmert's new water bath generation.
The Memmert water bath WTB15 tempers samples and reagents at +10 to +100 °C, with 14 litres of capacity for several vessels or a full test tube rack at once.
New model generation
The WTB15 is part of the full relaunch of the Memmert water bath range for price list 01-2027, which replaces the previous model line entirely. Accessories such as lids, base grids, insert racks and test tube racks now come with new order numbers. The pump module P7 for circulating the water bath can now be ordered as a factory option; previously the circulation pump was a separate retrofit part. When reordering accessories, it is worth checking the current order number, listed further down in this description.
Touch display and controls
Target and actual temperature appear on a 3.5-inch colour graphic touch display; 2-point calibration keeps the setting accurate. The customisable remote screen “CustomView” lets you adapt the display. Setting accuracy is 0.1 °C. The display shows the key operating values at a glance without needing a separate control panel.
Stainless steel tank and cleaning
The tank is deep-drawn stainless steel 1.4301, without corners or edges, with an integrated central drain system. The heater is mounted outside the chamber; the housing is also stainless steel. Four adjustable feet level the unit. That makes daily cleaning and disinfection between two different batches easier.
Connection and operation
The connected load is 1,420 W at 230 V and also 1,420 W at 115 V (50/60 Hz in each case). The 115 V version is available as option X2 at no extra cost. A standard lab socket is enough; no dedicated high-current connection is needed.
Size within the WTB range
At 14 litres, the WTB15 is the third of six models, between the WTB11 and the new WTB24. Controls, material and drain system are identical across the whole range; the main differences are internal dimensions, capacity, weight and, from the WTB15 upward, whether the pump module P7 is available.
Footprint and transport
Internal dimensions are 450 x 140 x 300 mm, external with the flat lid 547 x 397 x 292 mm, with the sloped lid 547 x 397 x 392 mm. Packed, the WTB15 arrives in a box measuring 640 x 530 x 495 mm, gross weight 23 kg, net weight 19 kg. The extra internal length fits a full test tube rack.
Pump module P7
For the WTB15, the pump module P7 can be ordered as a factory option and handles continuous circulation of the heat transfer medium. Without P7, the water surface stays calm, which can help when thawing sensitive samples gently.
Calibration and documentation
A factory calibration certificate is not part of the standard equipment and is not included in the scope of delivery. Anyone who needs documented calibration, for example for a quality management system according to ISO 9001 or for test equipment monitoring, can order it as an additional chargeable service through our procurement service. That way the initial commissioning can be documented without having to ship the unit off separately.
Typical applications
With a setting range of +10 to +100 °C, the WTB15 covers a wide range of tempering tasks in the lab. A test tube rack or the optional shaking attachment lets you process several samples at once.
Tempering and incubating sample series in test tube racksExtractions and reactions that need a defined water bath temperature over a longer periodFood and water analysis with several parallel batchesWith the optional shaking attachment: shaking incubation at a constant temperature
For sample series with a full test tube rack and the optional shaking attachment, the WTB15 is a practical size. Anyone who regularly needs more width for parallel batches will find the new WTB24 the next step up within the range.
Manufacturer's WEEE registration number (Memmert GmbH + Co. KG, Stiftung EAR): DE 66812464.
Memmert units bought from us are covered for three years from delivery: the first 12 months are followed by a 24-month warranty under Memmert's terms, handled through us. Your statutory rights remain unaffected.
Technical details
Capacity14 litres
Internal dimensions (L x W x H)450 x 140 x 300 mm
External dimensions with flat lid (L x W x H)547 x 397 x 292 mm
External dimensions with sloped lid (L x W x H)547 x 397 x 392 mm
Packed dimensions (L x W x H)640 x 530 x 495 mm
Temperature setting range+10 to +100 °C
Working temperature rangeat least 5 °C above room temperature up to +100 °C (with lid, depending on ambient pressure)
Setting accuracy0.1 °C
Control unit3.5″ colour graphic touch display, customisable remote screen “CustomView”, 2-point calibration
MaterialStainless steel 1.4301 (chamber and housing)
Drain systemIntegrated central drain system, tank without corners or edges
Feet4 adjustable feet
Voltage / power230 V, 50/60 Hz, 1,420 W (optional 115 V, 50/60 Hz, 1,420 W, option X2, no surcharge)
Net weight / gross weight19 kg / 23 kg
Scope of delivery
1× Memmert water bath WTB15 (base unit)1× stainless steel sloped lid
A factory calibration certificate is not included in the scope of delivery; details can be found above in the section Calibration and documentation. The pump module P7 is also a factory option and not fitted as standard.
Accessories for the WTB15
The following accessories are available for the WTB15 under the new order numbers:
Stainless steel flat lid, 6 openings Ø 107 mmB65807
Base gridB65815
Pump module P7 (factory option, circulates the water bath)P7
Basket insert (small)B66308
Shaking attachment (complete)SV1524
Individual requirements & procurement service
Insert racks and test tube racks with new order numbers are also available for the WTB15, matched to the relevant size. Our procurement service helps with choosing the right accessories, with spare parts, and with individual calibration requests. As a factory option, Memmert also offers IQ/OQ documents. We order these with the device on request.
The Memmert water bath WTB24 belongs to Memmert's new water bath generation.
The Memmert water bath WTB24 is the new mid-size model in the WTB range, with 20 litres of capacity for sample series that would be too tight in the WTB15.
New model generation
At 20 litres, the WTB24 is a new size within the range, filling the gap between the WTB15 and the WTB35. It is part of the full relaunch of the Memmert water bath range for price list 01-2027, which replaces the previous model line entirely, and comes with accessories such as lids, base grids, insert racks and test tube racks under new order numbers. The pump module P7 for circulating the water bath can be ordered as a factory option; previously the circulation pump was a separate retrofit part. When reordering accessories, it is worth checking the current order number, listed further down in this description.
Touch display and controls
The 3.5-inch colour graphic touch display shows target and actual temperature clearly; 2-point calibration safeguards the accuracy of 0.1 °C. The customisable remote screen “CustomView” makes the display adaptable. The display shows the key operating values at a glance without needing a separate control panel.
Stainless steel tank and cleaning
The WTB24 also has a deep-drawn stainless steel 1.4301 tank without corners or edges, with a central drain system. The heater outside the chamber and the stainless steel housing are standard across the range, as are the four adjustable feet. That makes daily cleaning and disinfection between two different batches easier.
Connection and operation
The connected load is 1,420 W at both 230 V and 115 V (50/60 Hz). The 115 V version is available as option X2 at no extra cost. A standard lab socket is enough; no dedicated high-current connection is needed.
Size within the WTB range
At 20 litres, the WTB24 is the new mid-size model in the range, between the WTB15 and the WTB35. Controls, material and drain system are identical across the whole range; the main differences are internal dimensions, capacity, weight and, from the WTB15 upward, whether the pump module P7 is available.
Footprint and transport
Internal dimensions are 450 x 190 x 300 mm, external with the flat lid 547 x 397 x 342 mm, with the sloped lid 547 x 397 x 449 mm. Packed dimensions are 640 x 530 x 495 mm at 24 kg gross, net weight is 20 kg. Compared with the WTB15, mainly the internal width has grown; the footprint stays the same.
Pump module P7
The pump module P7 can also be ordered as a factory option for the WTB24 and ensures continuous circulation of the heat transfer medium, for example with dense loading of several racks. Without P7, the water surface stays calm.
Calibration and documentation
A factory calibration certificate is not part of the standard equipment and is not included in the scope of delivery. Anyone who needs documented calibration, for example for a quality management system according to ISO 9001 or for test equipment monitoring, can order it as an additional chargeable service through our procurement service. That way the initial commissioning can be documented without having to ship the unit off separately.
Typical applications
With a setting range of +10 to +100 °C, the WTB24 covers a wide range of tempering tasks in the lab. The extra width compared with the WTB15 leaves room for more vessels side by side, for example in two test tube racks.
Tempering larger sample series where the WTB15 is too small and the WTB35 is oversizedParallel batches in test tube racks or larger vesselsRoutine quality assurance work with medium sample throughputWith the optional shaking attachment: shaking incubation at a constant temperature
The WTB24 is suitable when the WTB15 gets too tight for the sample series at hand but a WTB35, with significantly more internal length, is not needed. Labs that regularly run several racks in parallel benefit from the extra width.
Manufacturer's WEEE registration number (Memmert GmbH + Co. KG, Stiftung EAR): DE 66812464.
Memmert units bought from us are covered for three years from delivery: the first 12 months are followed by a 24-month warranty under Memmert's terms, handled through us. Your statutory rights remain unaffected.
Technical details
Capacity20 litres
Internal dimensions (L x W x H)450 x 190 x 300 mm
External dimensions with flat lid (L x W x H)547 x 397 x 342 mm
External dimensions with sloped lid (L x W x H)547 x 397 x 449 mm
Packed dimensions (L x W x H)640 x 530 x 495 mm
Temperature setting range+10 to +100 °C
Working temperature rangeat least 5 °C above room temperature up to +100 °C (with lid, depending on ambient pressure)
Setting accuracy0.1 °C
Control unit3.5″ colour graphic touch display, customisable remote screen “CustomView”, 2-point calibration
MaterialStainless steel 1.4301 (chamber and housing)
Drain systemIntegrated central drain system, tank without corners or edges
Feet4 adjustable feet
Voltage / power230 V, 50/60 Hz, 1,420 W (optional 115 V, 50/60 Hz, 1,420 W, option X2, no surcharge)
Net weight / gross weight20 kg / 24 kg
Scope of delivery
1× Memmert water bath WTB24 (base unit)1× stainless steel sloped lid
A factory calibration certificate is not included in the scope of delivery; details can be found above in the section Calibration and documentation. The pump module P7 is also a factory option and not fitted as standard.
Accessories for the WTB24
The following accessories are available for the WTB24 under the new order numbers:
Stainless steel flat lid, 6 openings Ø 107 mmB65807
Base gridB65815
Pump module P7 (factory option, circulates the water bath)P7
Basket insert (small)B66308
Shaking attachment (complete)SV1524
Individual requirements & procurement service
Insert racks and test tube racks with new order numbers are also available for the WTB24, matched to the relevant size. Our procurement service helps with choosing the right accessories, with spare parts, and with individual calibration requests. As a factory option, Memmert also offers IQ/OQ documents. We order these with the device on request.
The Memmert water bath WTB35 belongs to Memmert's new water bath generation.
The Memmert water bath WTB35 tempers larger sample volumes between +10 and +100 °C. At 32 litres, it is suitable for several racks or larger vessels at once.
New model generation
The WTB35 is part of the full relaunch of the Memmert water bath range for price list 01-2027, which replaces the previous model line entirely. Accessories such as lids, base grids, insert racks and test tube racks now come with new order numbers. The pump module P7 for circulating the water bath can now be ordered as a factory option, previously the circulation pump was a separate retrofit part. When reordering accessories, it is worth checking the current order number, listed further down in this description.
Touch display and controls
A 3.5-inch colour graphic touch display with 2-point calibration controls the temperature to an accuracy of 0.1 °C. The customisable remote screen “CustomView” allows its own display layout, useful when several identical units run in the same lab. The display shows the key operating values at a glance, no separate control panel is needed.
Stainless steel tank and cleaning
The deep-drawn stainless steel tank (1.4301) is made without corners or edges, the integrated central drain system makes emptying easier given the larger fill volume here. The heater sits outside the chamber, the housing is stainless steel, four adjustable feet carry the extra weight safely. That makes daily cleaning and disinfection between two different batches easier.
Connection and operation
Connected load is 2,840 watts at 230 V and 1,840 watts at 115 V (50/60 Hz). The 115 V version is available as option X2 at no extra cost. A standard lab socket is enough, no dedicated high-current connection is needed.
Size within the WTB range
At 32 litres, the WTB35 is the second-largest model, between the WTB24 and the WTB50. Controls, material and drain system are identical across the whole range, what mainly differs is internal dimensions, capacity, weight and, from the WTB15 upward, whether the pump module P7 is available.
Footprint and transport
Internal dimensions are 650 x 140 x 450 mm, external with the flat lid 747 x 547 x 292 mm, with the sloped lid 747 x 547 x 404 mm. Packed, the WTB35 arrives in a box measuring 840 x 680 x 495 mm, gross weight 37.5 kg, net weight 32.5 kg. Because of the weight, a second person is recommended for transport into the lab.
Pump module P7
For the WTB35, the pump module P7 can be ordered as a factory option and handles continuous circulation of the heat transfer medium, useful at larger fill volumes and dense loading. Without P7, the water surface stays calm, for example for gently thawing sensitive samples.
Calibration and documentation
A factory calibration certificate is not part of the standard equipment and is not included in the scope of delivery. Anyone who needs documented calibration, for example for a quality management system under ISO 9001 or for test equipment monitoring, can order it as an additional chargeable service through our procurement service. That way the initial commissioning can be documented without having to ship the unit off separately.
Typical applications
With a setting range of +10 to +100 °C, the WTB35 covers a wide range of tempering tasks in the lab. With several test tube racks or the basket insert, larger sample series can be processed in a single run.
Tempering larger sample volumes or several racks at onceThawing and warming processes where the pump module helps even out the temperature distributionFood and water analysis with higher sample throughputChemical and microbiological routine work that needs documented temperature control
For larger sample volumes or several racks at once, the WTB35 is a good fit, with the pump module P7 available for even mixing. Anyone who needs still more capacity will find the WTB50 as the largest model in the range.
Manufacturer's WEEE registration number (Memmert GmbH + Co. KG, Stiftung EAR): DE 66812464.
Memmert units bought from us are covered for three years from delivery: the first 12 months are followed by a 24-month warranty under Memmert's terms, handled through us. Your statutory rights remain unaffected.
Technical details
Capacity32 litres
Internal dimensions (L x W x H)650 x 140 x 450 mm
External dimensions with flat lid (L x W x H)747 x 547 x 292 mm
External dimensions with sloped lid (L x W x H)747 x 547 x 404 mm
Packed dimensions (L x W x H)840 x 680 x 495 mm
Temperature setting range+10 to +100 °C
Working temperature rangeat least 5 °C above room temperature up to +100 °C (with lid, depending on ambient pressure)
Setting accuracy0.1 °C
Control unit3.5″ colour graphic touch display, customisable remote screen “CustomView”, 2-point calibration
MaterialStainless steel 1.4301 (chamber and housing)
Drain systemIntegrated central drain system, tank without corners or edges
Installation4 adjustable feet
Voltage / power230 V, 50/60 Hz, 2,840 W (optional 115 V, 50/60 Hz, 1,840 W, option X2)
Net weight / gross weight32.5 kg / 37.5 kg
Scope of delivery
1× Memmert water bath WTB35 (base unit)1× stainless steel sloped lid
A factory calibration certificate is not part of the scope of delivery, details are given above in the section Calibration and documentation. The pump module P7 is also a factory option and not fitted as standard.
Accessories for the WTB35
The following accessories are available for the WTB35 under the new order numbers:
Stainless steel flat lid, 8 openings Ø 107 mmB65808
Base gridB65816
Pump module P7 (factory option, circulates the water bath)P7
Basket insert (large)B66309
Shaking attachment (complete)SV3550
The stainless steel flat lid (8 openings Ø 107 mm) and the base grid are available as accessories. The complete shaking attachment SV3550 and the large basket insert are also available as accessories.
Individual requirements & procurement service
Insert racks and test tube racks with new order numbers are also available for the WTB35, matched to the relevant size. Our procurement service helps with choosing the right accessories, with spare parts, and with individual calibration requests. As a factory option, Memmert also offers IQ/OQ documents. We order these with the device on request.
The Memmert water bath WTB50 belongs to Memmert's new water bath generation.
The Memmert water bath WTB50 is the largest model in the new WTB range at 45 litres, built for high sample throughput and several test tube racks at once.
New model generation
The WTB50 is part of the full relaunch of the Memmert water bath range for price list 01-2027, which replaces the previous model line entirely. Accessories such as lids, base grids, insert racks and test tube racks now come with new order numbers. The pump module P7 for circulating the water bath can now be ordered as a factory option, previously the circulation pump was a separate retrofit part. When reordering accessories, it is worth checking the current order number, listed further down in this description.
Touch display and controls
Temperature control runs through a 3.5-inch colour graphic touch display with 2-point calibration, setting accuracy is 0.1 °C. The customisable remote screen “CustomView” can be adapted to your own workflow. The display shows the key operating values at a glance, no separate control panel is needed.
Stainless steel tank and cleaning
The deep-drawn stainless steel tank (1.4301) without corners or edges has an integrated central drain system, important at the largest fill volume in the range. The heater sits outside the chamber, the housing is stainless steel, four adjustable feet carry the weight safely. That makes daily cleaning and disinfection between two different batches easier.
Connection and operation
Connected load is 2,840 watts at 230 V and 1,840 watts at 115 V (50/60 Hz). The 115 V version is available as option X2 at no extra cost. A standard lab socket is enough, no dedicated high-current connection is needed.
Size within the WTB range
At 45 litres, the WTB50 is the largest of the six WTB models. Controls, material and drain system are identical across the whole range, what mainly differs is internal dimensions, capacity, weight and, from the WTB15 upward, whether the pump module P7 is available.
Footprint and transport
Internal dimensions are 650 x 190 x 450 mm, external with the flat lid 747 x 547 x 342 mm, with the sloped lid 747 x 547 x 454 mm. Packed, the WTB50 arrives in a box measuring 840 x 680 x 495 mm, gross weight 38.5 kg, net weight 33.5 kg. As the largest and heaviest model in the range, it is best set up by two people.
Pump module P7
For the WTB50, the pump module P7 can be ordered as a factory option and handles continuous circulation of the heat transfer medium at the largest fill volume in the range. Without P7, the water surface stays calm.
Calibration and documentation
A factory calibration certificate is not part of the standard equipment and is not included in the scope of delivery. Anyone who needs documented calibration, for example for a quality management system under ISO 9001 or for test equipment monitoring, can order it as an additional chargeable service through our procurement service. That way the initial commissioning can be documented without having to ship the unit off separately.
Typical applications
With a setting range of +10 to +100 °C, the WTB50 covers a wide range of tempering tasks in the lab. With high sample volumes, the large capacity cuts down on the number of runs needed in daily lab work.
Tempering large sample volumes or many vessels across several test tube racksHigh-throughput lab routine where a larger bath cuts down on waiting timeThawing and warming larger batches, with active circulation via the pump module if neededRunning as a central water bath for several workstations in chemistry or food labs
As the largest model in the range, the WTB50 is suitable for labs with high sample throughput or several test tube racks running in parallel. For smaller sample volumes, the more compact models in the WTB range, such as the WTB35, are often the more economical choice.
Manufacturer's WEEE registration number (Memmert GmbH + Co. KG, Stiftung EAR): DE 66812464.
Memmert units bought from us are covered for three years from delivery: the first 12 months are followed by a 24-month warranty under Memmert's terms, handled through us. Your statutory rights remain unaffected.
Technical details
Capacity45 litres
Internal dimensions (L x W x H)650 x 190 x 450 mm
External dimensions with flat lid (L x W x H)747 x 547 x 342 mm
External dimensions with sloped lid (L x W x H)747 x 547 x 454 mm
Packed dimensions (L x W x H)840 x 680 x 495 mm
Temperature setting range+10 to +100 °C
Working temperature rangeat least 5 °C above room temperature up to +100 °C (with lid, depending on ambient pressure)
Setting accuracy0.1 °C
Control unit3.5″ colour graphic touch display, customisable remote screen “CustomView”, 2-point calibration
MaterialStainless steel 1.4301 (chamber and housing)
Drain systemIntegrated central drain system, tank without corners or edges
Installation4 adjustable feet
Voltage / power230 V, 50/60 Hz, 2,840 W (optional 115 V, 50/60 Hz, 1,840 W, option X2)
Net weight / gross weight33.5 kg / 38.5 kg
Scope of delivery
1× Memmert water bath WTB50 (base unit)1× stainless steel sloped lid
A factory calibration certificate is not part of the scope of delivery, details are given above in the section Calibration and documentation. The pump module P7 is also a factory option and not fitted as standard.
Accessories for the WTB50
The following accessories are available for the WTB50 under the new order numbers:
Stainless steel flat lid, 8 openings Ø 107 mmB65808
Base gridB65816
Pump module P7 (factory option, circulates the water bath)P7
Basket insert (large)B66309
Shaking attachment (complete)SV3550
The stainless steel flat lid (8 openings Ø 107 mm) and the base grid are available as accessories. The complete shaking attachment SV3550 and the large basket insert are also available as accessories.
Individual requirements & procurement service
Insert racks and test tube racks with new order numbers are also available for the WTB50, matched to the relevant size. Our procurement service helps with choosing the right accessories, with spare parts, and with individual calibration requests. As a factory option, Memmert also offers IQ/OQ documents. We order these with the device on request.