IKA RW 28 Digital Overhead Stirrer
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Description
Description
Heavy-Duty Overhead Stirrer for Viscous Mixing Up to 80 Liters in Labs and Pilot Plants
The IKA RW 28 Digital Overhead Stirrer is a mechanically controlled lab stirrer built for high-viscosity samples and larger batch volumes—up to 80 liters (H₂O). With its strong torque output of up to 900 Ncm, this unit is ideal for demanding applications in research labs and pilot production facilities.
It features a digital speed display, push-through agitator shaft, and two speed ranges that provide versatility for a wide range of materials. The integrated overheating protection and constant power drive ensure safe, reliable, and continuous operation.
🔧 Key Features
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Max capacity: 80 L
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Max torque: 900 Ncm (1144 Ncm in overload)
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Speed range: 60–1400 RPM across two gear ranges
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Viscosity handling: Up to 50,000 mPas
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Digital LED speed display with ±1 RPM accuracy
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Quiet operation at 62.5 dB(A)
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Push-through agitator shaft for quick tool changes
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Overload and overheat protection with error code display
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Rugged alu-cast housing with IP40 rating
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2-year warranty
📊 Technical Specifications
| Specification | Details |
|---|---|
| Max stirring volume | 80 Liters (H₂O) |
| Viscosity max | 50,000 mPas |
| Speed range (50 Hz) | 60–400 RPM (I), 240–1400 RPM (II) |
| Speed range (60 Hz) | 72–480 RPM (I), 288–1680 RPM (II) |
| Speed control | Stepless |
| Speed display / accuracy | LED / ±1 RPM |
| Speed deviation | ±10 RPM |
| Torque at shaft (nominal/max) | 900 Ncm / 1144 Ncm (at 60 RPM) |
| Torque at 100 / 1000 RPM | 900 Ncm / 86 Ncm |
| Torque I / II | 900 / 300 Ncm |
| Output power at shaft | 90 W |
| Motor input/output | 220 W / 94 W |
| Operating mode | 100% duty cycle (continuous) |
| Chuck range | 1–10 mm |
| Hollow shaft (inner Ø / push-through) | 10.5 mm / Yes (when stopped) |
| Stirrer mounting | Extension arm (16 mm × 145 mm) |
| Noise level | 62.5 dB(A) |
| Dimensions (W × H × D) | 4.8" × 14.3" × 9.9" (123 × 364 × 252 mm) |
| Weight | 16.5 lbs (7.5 kg) |
| Housing material | Aluminum-cast + thermoplastic polymer |
| Protection class | IP40 |
| Ambient temp / humidity | 5–40 °C / ≤ 80% RH |
| RS232 / USB / Analog outputs | Not available |
| Voltage / Frequency | 220–240 / 115 / 100 V |
| Power input | 200 W |
| Explosion-proof / Cleanroom rated | No / No |
💡 Additional Notes
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Suitable for viscous mixing, emulsions, and semi-solids
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Self-locking temperature limiter protects motor from damage
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Clamping fixtures and shaft protection available separately
🧪 FAQ
Q: Is the RW 28 stirrer safe for flammable solvents or cleanroom use?
A: No, the RW 28 is not explosion-proof and not rated for cleanroom environments.
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