IKA RW 20 Digital Overhead Stirrer
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Description
Description
Compact Digital Overhead Stirrer for Medium-Viscosity Mixing Up to 20 Liters in Laboratory Applications
The IKA RW 20 Digital Overhead Stirrer is a lab favorite for medium-volume, medium-viscosity mixing up to 20 liters (H₂O). With a robust design, digital speed display, and constant power-drive, it’s engineered for daily lab use in research, education, and light industrial settings.
This upgraded version of the classic RW 20 series includes two speed ranges, a push-through shaft, and stepless control up to 2000 RPM, giving users the flexibility to handle various sample types with consistent torque and smooth operation.
🔧 Key Features
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Mixes up to 20 liters of water-based solutions
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Two speed ranges: 60–500 RPM and 240–2000 RPM
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Digital LED speed display for real-time control
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Handles viscosities up to 10,000 mPas
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High torque: 150 Ncm (up to 300 Ncm in overload)
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Push-through shaft (when stationary)
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Ergonomic and slimline housing
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Stepless speed adjustment with ±1 RPM precision
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100% duty cycle for continuous operation
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2-year warranty
📊 Technical Specifications
| Specification | Details |
|---|---|
| Max stirring volume | 20 Liters (H₂O) |
| Viscosity max | 10,000 mPas |
| Speed range (50 Hz) | 60–500 RPM (I), 240–2000 RPM (II) |
| Speed range (60 Hz) | 72–600 RPM (I), 288–2400 RPM (II) |
| Speed control | Stepless |
| Speed accuracy | ±1 RPM |
| Speed deviation | ±30 RPM |
| Torque max at 60 RPM | 300 Ncm |
| Torque at 100 RPM | 150 Ncm |
| Torque at 1000 RPM | 24 Ncm |
| Nominal torque | 1.5 Nm |
| Output at stirring shaft | 26 W |
| Motor input/output | 85 W / 35 W |
| Operating mode | 100% continuous |
| Chuck range | 0.5–10 mm |
| Hollow shaft (inner Ø / push-through) | 10.5 mm / Yes (when stopped) |
| Mounting | Extension arm (13 mm × 160 mm) |
| Housing material | Alu-cast coating / thermoplastic polymer |
| Noise level | Not specified |
| Dimensions (W × H × D) | 3.5" × 11.6" × 8.4" (88 × 294 × 212 mm) |
| Weight | 6.8 lbs (3.1 kg) |
| Protection class | IP 20 |
| Ambient temp / humidity | 5–40°C / ≤80% RH |
| Voltage / Frequency | 220–240 / 100–115 V |
| Power input | 87 W |
| Interfaces (RS232/USB/Analog) | Not available |
| Timer / Programmable | No / No |
💡 Additional Notes
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Ideal for general lab mixing in chemistry, biology, and food science
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Digital control helps maintain precise, repeatable mixing speeds
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Compact design fits standard lab stands and setups
🧪 FAQ
Q: Can the RW 20 Digital be used with flammable solvents or in cleanrooms?
A: No. It is not explosion-proof and not certified for cleanroom use.
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