Benchmark LCD Overhead Stirrers
Image SKU Description Capacity Speed Range Max Torque Includes Electrical Quantity Price Add to Cart
IPS2050-20 OS20L Overhead Stirrer 20 L 30-2200 rpm 40 Ncm stand and propeller (IPS2050-P-S4) 100-240VAC, 50-60Hz 1 Each
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IPS2050-40 OS40L Overhead Stirrer 40 L 30-2200 rpm 60 Ncm stand and propeller (IPS2050-P-S4) 100-240VAC, 50-60Hz 1 Each
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Benchmark's Overhead Stirrers feature high torque and advanced digital microprocessor control for smooth mixing of low and medium viscosity samples. Speed and run time are accurately set and monitored on the LCD screen. Both the 20L and 40L capacity models are supplied with a 4 arm stainless steel propeller, additional steel and Teflon accessories are available. A feed-through chuck holds accessory shafts firmly in place and is easily tightened and loosened without tools.

The overhead stirrers are protected from damage by sensors that shut down operation in the case of high viscosity or obstruction, while a splash cover protects the connection mechanism from potential corrosion.

Unlike most mixers, the Benchmark series is also supplied with a support stand and mounting hardware. The stirrer easily and securely attaches to the stand for compatibility with a variety of vessels, up to 24 inches high.


Model OS-20L OS-40L
Mixing Capacity (H2O) 20 L 40 L
Maximum Torque 40 Ncm 60 Ncm
Input Power 60 W 120 W
Output Power 50 W 100 W
Net Weight (Mixer) 2.6 kg 2.8 kg
Maximum Viscosity 10000 mPas 50000 mPas
Speed Range 30-2200 rpm 30-2200 rpm
Motor Type DC brushless motor DC brushless motor
Chuck Diameter Range 0.5-10 mm 0.5-10 mm
Exterior Dims. (WxDxH) 7.3 x 3.3 x 8.7 in. / 18.6 x 8.3 x 22.0 cm. 7.3 x 3.3 x 8.7 in. / 18.6 x 8.3 x 22.0 cm.
Protection Mode IP42 IP42
Ambient Operating Range 5-40°C 5-40°C
Electrical 100-240VAC 50-60Hz 100-240VAC 50-60Hz
Warranty 2 years 2 years


Product Data Sheets
Benchmark Overhead Stirrer Product Data Sheet

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