IKA RW 20 digital Mechanical Stirrer, 20 Litre, 2 Speed Ranges, LED, 0003593000

The RW 20 digital Package is the compact entry-level model in IKA’s mechanical RW series and comes complete with a stand, cross-sleeve and propeller stirrer. The set can stir up to 20 l of water, with a torque of up to 150 Ncm. For those looking for a stirrer that is ready for immediate use without having to purchase a stand and stirring element separately, this package offers the ideal solution for smaller batches in the laboratory.Two speed ranges for small batchesIn range I, the speed is between 60 and 500 rpm (at 50 Hz); the torque at the stirring shaft reaches up to 150 Ncm, and up to 300 Ncm for short periods under overload at 60 1/min. In Range II, the speed increases to up to 2,000 rpm. The speed can be adjusted continuously, with an accuracy of ±1 rpm. According to the manufacturer, the basic unit can handle viscosities of up to 10,000 mPas; it is designed for thin to medium-viscosity media, which is significantly less than the 50,000 mPas of the larger RW 28 digital.Set components and mechanicsIn addition to the RW 20 digital base unit, the package includes the R 1826 plate stand, the R 182 cross-sleeve and the R 1342 four-bladed propeller stirrer. The chuck accommodates stirring shafts with a diameter between 0.5 and 10 millimetres; the hollow shaft, with an internal diameter of 10.5 mm, can be inserted even when the unit is at a standstill. The bracket for mounting the stand measures 13 mm in diameter and 160 mm in length; a temperature limiter protects the motor from overheating.Dimensions and weight of the base unitThe weight of 3.1 kg and the dimensions of 88 x 294 x 212 mm stated in the data sheet refer to the RW 20 digital base unit alone. We can provide the total weight for the complete set, including the stand, cross-sleeve and propeller stirrer, on request; for dispatch planning purposes, the actual parcel weight is correspondingly higher than this figure. The basic unit has an IP 20 protection rating.Additional stirring elements for the base unitIn addition to the supplied R 1342 propeller stirrer, IKA offers a wide range of stirring elements for the RW 20 digital: axially conveying propeller and centrifugal stirrers as well as helical stirrers, radially conveying dissolvers and disc stirrers, and the tangentially operating anchor stirrer R 1330. Also available as accessories are additional plate stands, a clamping holder, a stirrer shaft guard, a beaker lid and a flexible coupling. For environments requiring validation, IKA provides qualification and factory calibration certificates, as well as IQ/OQ documents for the unit.Typical applicationsStirring of small batches up to 20 l in the laboratoryReady-to-use set with no need to purchase a separate standPowerful stirring in range I, fast stirring in range II up to 2,000 rpmMixing processes with viscosities up to 10,000 mPasPositioning within the RW seriesWithin the mechanical RW series, the RW 20 digital Package is the smallest model and the only one supplied as a complete set with a stand. For larger batches up to 80 l and 900 Ncm, the RW 28 digital is available; for batches up to 200 l and 3,000 Ncm, the RW 47 digital is available. Those looking for electronic speed control with an LCD display instead of mechanical control will find the EUROSTAR 20 digital to be a suitable alternative in a similar performance class.Technical detailsMax. mixing volume (H2O)20 lMotor power input / output70 W / 35 WSpeed range I / II60 to 500 rpm / 240 to 2,000 rpmMax. torque at the stirring shaft150 NcmMax. viscosity10,000 mPasChuck clamping range0.5 to 10 mmHollow shaft, internal diameter10.5 mm, can be passed through when stationaryArm diameter / length13 mm / 160 mmProtection classIP 20 (DIN EN 60529)Permissible ambient temperature / humidity5 to 40 °C / 80 %Dimensions of base unit (W x H x D)88 x 294 x 212 mmWeight of base unit3.1 kgConnected load220 to 240 V (additional voltage variant 100 to 115 V available)Scope of deliveryRW 20 digital stirrer (base unit)R 1826 plate stand (ID no. 0003160100)R 182 cross-sleeve (ID No. 0002657700)R 1342 propeller stirrer, 4-bladed (ID No. 0000741000)We can confirm on request whether a chuck key is included.Warranty and procurement serviceIKA provides a manufacturer’s warranty for the RW 20 digital Package: 2 years, extended to 3 years upon registration at ika.com/register within 90 days of purchase. For additional stirring elements or a larger model from the RW series, LT Laborhandel’s procurement service will handle the configuration; the full range of stirring and mixing equipment is available in the shop.

The IKA R 301 stirrer shaft guard (MPN 0002603000) is an essential mechanical safety component for the safe and accident-free operation of laboratory overhead stirrers. During intensive mixing, dispersing or homogenisation processes, considerable kinetic forces act on rotating stirrer shafts. This professional shaft guard forms a physical barrier that reliably protects laboratory staff from accidental contact with the rotating parts. It effectively prevents clothing, hair or laboratory gloves from being drawn in, making the safety device a key component in risk assessments and ensuring compliance with strict national and international health and safety guidelines. Stepless length adjustment for flexible experimental set-ups From a process engineering perspective, the R 301 model excels thanks to its high degree of telescopic flexibility. The guard can be adjusted axially steplessly within a length range of 190 to 310 mm and locked into place precisely. This variable geometry allows for precise adaptation to different shaft lengths, vessel heights and varying immersion depths of the stirring elements. Laboratories thus benefit from a highly adaptable protective system that can be flexibly integrated into changing experimental set-ups without compromising workplace ergonomics. Unrestricted process control thanks to a high-quality Plexiglas matrix The cylindrical protective screen is made entirely from a high-purity, mechanically stable Plexiglas matrix. This material combines minimal weight with outstanding optical clarity. Laboratory staff are able to monitor the mixture, transient flow patterns, phase transitions or any boiling delays in the sample vessel at all times, with absolutely no restrictions and without any risk of error. At the same time, the Plexiglas structure offers effective protection against transient media splashes and can be cleaned quickly and without leaving any residue. Technical details Design & Material Product designation: R 301 Operating principle: Physical shielding of rotating drive components Protective screen material: Highly transparent, impact-resistant Plexiglas Length adjustability: Infinitely adjustable axially from 190 to 310 mm Optical properties: Uncompromising visual process monitoring without distortion Compatibility & Installation Direct mounting on the stirrer: Suitable for IKA RW 20 digital, RW 28 digital and the entire EUROSTAR series Mounting with accessories (R 301.1 stand mount required): For compact models such as the IKA NANOSTAR 7.5 digital, MINISTAR series, MICROSTAR series and Eurostar 400 Exclusion criterion: Not compatible with the RW 47 D large-scale stirrer (the R 302 variant is required for this) Customs tariff number (HS Code): 84799070 Contents of delivery 1 x IKA R 301 stirrer shaft guard (MPN: 0002603000) 1 x Mounting and fixing element set 1 x Quick guide / Safety guide for accident prevention in the laboratory Customised requirements & accessories To set up a fully compliant, safe and digital stirring workstation, we offer a comprehensive range of complementary IKA system peripherals: R 301.1 stand mount: An essential accessory for the stable, mechanical fixing of the stirrer shaft guard to compact stirrer drives such as the MINISTAR or MICROSTAR series. Overhead stirrers: Perfectly matched to the reliable IKA RW 20 digital drive systems or the high-end models of the EUROSTAR series (basic and control). Laboratory stands & clamps: Extremely stable plate and telescopic stands (e.g. R 2722) as well as robust cross clamps (e.g. R 270) for vibration-free securing of the entire stirring assembly. Make use of our technical B2B procurement service to ensure the reliable design of your laboratory set-ups.

An overhead stirrer such as the IKA RW 20 digital needs its own stand to hold the drive securely above the stirring vessel. The IKA R 1825 plate stand (MPN 0003160000) is the entry-level model in the IKA stand series for this purpose, with a stable base plate on which the stirring vessel itself can also stand.With a rod height of 560 mm and a rod diameter of 16 mm, the stand has enough room to position the stirrer head above vessels of different heights, and takes up to 5 kg of load according to the manufacturer.CompatibilityOfficial accessory for the IKA RW 20 digital stirrer (MPN 0003593000), listed under stands on the corresponding accessory page. For higher demands, the same series also includes the larger models R 1826 and R 1827.Technical detailsHeight560 mmBase plate (W x D)200 x 316 mmRod diameter16 mmMax. load5 kgContents of the package1 x IKA R 1825 plate stand (MPN 0003160000).Individual requirements & procurement serviceFor mounting the stirrer to the stand rod we also carry the matching IKA R 182 cross clamp. Our procurement service also advises on the larger stand models R 1826 and R 1827 if more height or stability is required.

The IKA R 182 cross clamp (MPN 0002657700) connects the drive head of the IKA RW 20 digital at a right angle to the stand rod and fixes the stirrer at the desired height above the stirring vessel, without the position shifting during stirring.CompatibilityOfficial accessory for the IKA RW 20 digital stirrer (MPN 0003593000), listed under fixing elements on the corresponding accessory page.Technical detailsDesignCross clamp for mounting the stirrer to the stand rod at a right angleContents of the package1 x IKA R 182 cross clamp (MPN 0002657700).Individual requirements & procurement serviceFor the matching stand rod we also carry the IKA R 1825 plate stand. Our procurement service helps put together the complete stirrer stand assembly.

The IKA R 1342 propeller stirrer (MPN 0000741000) generates an axial flow on the RW 20 digital, circulating the medium mainly from top to bottom and back again. With four blades on a 50 mm diameter, it is suited to homogenising low to medium viscosity liquids as well as stirring in solids and suspending particles, where even mixing of the whole vessel volume is the priority.CompatibilityOfficial accessory for the IKA RW 20 digital stirrer (MPN 0003593000), listed under axial-flow stirring elements on the corresponding accessory page.Technical detailsTypePropeller stirrer, axial flowNumber of blades4Diameter50 mmLength350 mmContents of the package1 x IKA R 1342 propeller stirrer (MPN 0000741000).Individual requirements & procurement serviceFor applications with higher viscosity or a different flow pattern, the same accessory range for the RW 20 digital also includes turbine, centrifugal and anchor stirrers. Our procurement service advises on the right stirring element for your medium.

The IKA R 1330 anchor stirrer (MPN 0002022300) is a stirring element made of stainless steel 1.4571 for overhead stirrers. It has a stirrer diameter of 45 mm and a shaft with a diameter of 8 mm and a length of 350 mm. It is intended for medium to highly viscous media that are stirred at low speeds, up to a maximum of 1,000 rpm.A polymer batch that sits thick in the vessel, or a mixture with a high mineral content that is to stay evenly distributed: the R 1330 is intended for tasks like these.Tangential flow of the anchor stirrer with a high shear rate at the edgeThe anchor stirrer moves the medium tangentially, that is, in the circumferential direction around the stirrer axis, and not axially like a propeller stirrer. The shear rate is high at the edge of the stirrer, and few deposits are left on the vessel wall. With viscous batches this matters, because material on the wall is withdrawn from the mixing process.It is used at low speeds. The stirrer diameter of 45 mm determines the minimum width of the opening of the stirring vessel.Typical applicationsHomogenising medium to highly viscous liquids in the laboratoryStirring in polymer reactionsEvenly distributing high mineral content in liquidsBatches where little material should be deposited on the vessel wallWorking at low speeds on an overhead stirrerSuitable for IKA overhead stirrers with an 8 mm chuckThe shaft with a diameter of 8 mm fits into chucks for an 8 mm shaft. These include the IKA overhead stirrers EUROSTAR 20, 40, 60, 100, 200 and 400 (digital and control), RW 20 digital as well as MINISTAR, MICROSTAR and NANOSTAR. At LT Laborhandel you will find EUROSTAR 20, 40, 60, 100, 200 and 400 digital, RW 20 digital, MINISTAR 20, 40 and 80 digital, MICROSTAR 7.5 digital and NANOSTAR 7.5 digital.Whether a stirrer drives the anchor stirrer safely in your medium depends on the viscosity and on the torque of the stirrer. The more viscous the batch, the more torque is required. Therefore check before purchase whether your device is sufficient for your batch and whether the chuck accepts a shaft of 8 mm.MaterialThe wetted parts of the R 1330 are made of stainless steel 1.4571. The weight of the stirrer is 0.151 kg.Technical detailsTypeAnchor stirrerStirrer diameter45 mmShaft diameter8 mmShaft length350 mmMaximum speed1,000 rpmFlowtangentialSuitable formedium to highly viscous mediaMaterial, wetted partsStainless steel 1.4571Weight0.151 kgMountChuck for 8 mm shaftScope of delivery1 x IKA R 1330 anchor stirrer (MPN 0002022300). The overhead stirrer is not included in the scope of delivery.Individual requirements and procurement serviceIf your medium requires a different flow pattern, we carry the IKA R 1342 propeller stirrer for the RW 20 digital, for low to medium viscosity liquids. A stirrer shaft protector, for example the IKA R 401, also fits the overhead stirrer setup. Our procurement service helps with the choice of the suitable stirring element and the overhead stirrer for your batch.