Elite Scientific and Meditech Co.



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Overhead stirrers



The OS40-Pro, OS20-Pro, OS40-S and OS20-S are efficient and carefully controlled digital overhead stirrer models for the safe and effective mixing of large volumes of liquids.

The OS40-Pro LCD and OS20-Pro LCD digital overhead stirrers allow the user to set the required torque and speed, and observe their true values on an easy-to-read LCD display. An accurate microprocessor controls stirring speed and guarantees precision in the speeds achieved.

The OS40-S LED and the OS20-S LED models provide a precise display of the actual speed that is selected via an analog dial.

Both LED and LCD models have over-torque protection to automatically stop motor in case of continuous overload. Anti-spill microprocessor control insures the slow start up of speed to prevent sample spills.

Features of the OS40-Pro, OS20-Pro, OS40-S and OS20-S Overhead Stirrers:

  • High torque
  • A choice of 40L or 20L capacities
  • Through shaft design to allow for adjustment of impeller position
  • Speed 50-2200 rpm
  • Large 0.5 – 13 mm chuck diameter accommodates many shaft types
  • Continuous overload automatically stops motor
  • Slow startup to avoid sample spills
  • Analog speed control, speed displayed on LED display (OS40-S and OS20-S)
  • Microprocessor setup and control of parameters, speed displayed on bright LCD display (OS40-Pro and OS20-Pro)
  • RS232 port for PC control and documentation (OS40-Pro and OS20-Pro)
Model: OS40-Pro OS20-Pro OS40-S OS20-S
Maximum stirring quantity H2O: (L) 40 20 40 20
Motor rating, Input, Output: (W) 120, 100 60, 50 120, 100 60, 50
Speed range: (rpm) 50-2200 50-2200 50-2200 50-2200
Speed display accuracy: (rpm) ± 3 ± 3
Speed display: LCD LCD LCD LCD
Speed display resolution: (rpm) ± 1 ± 1 ± 1 ± 1
Maximum torque: (Ncm) 60 40 60 40
Torque display: LCD LCD
Overload protection and Motor protection: LED lights, motor stops LED lights, motor stops LED lights, motor stops LED lights, motor stops
Viscosity maximum: (mPas) 50,000 10,000 50,000 10,000
Chuck diameter range: (mm) 0.5-13 0.5-13 0.5-13 0.5-13
Temperature permitted: (°C) 5-40 5-40 5-40 5-40
Relative humidity permitted: (%) 80 80 80 80
Remote control with RS232 interface: Yes Yes Not available Not available
Dimensions: W×D×H (mm) 83×186×220 83×186×220 83×186×220 83×186×220
Weight: (kg) 2.8 2.6 2.8 2.6
Power: (V, Hz, W) 100-240, 50/60, 130 100-240, 50/60, 130 100-240, 50/60, 130 100-240, 50/60, 130