Overhead Stirrers are competent for most demanding tasks with guaranteed safety and performance. They are widely used in chemical synthesis, pharmaceutical synthesis, physical and chemical analysis, petrochemical industries, etc. Features: Brushless DC motor for long life, maintenance free Constant speed despite viscosity change of the sample Start/run smoothly, prevent sample splatter or overflow Self - locking drill chuck, tools free Specifications: Max. stirring quantity[H2O]: 40L Speed range: 50~2200rpm Speed display accuracy: ±3rpm Max. torque: 60N ·cm Viscosity max.: 50000mPa ·s Motor type: Brushless DC motor Voltage,Frequency: 100~240V, 50/60 Hz Speed display: LCD Torque display: LCD Overload protection display: LCD Chuck clamp range diameter: 0.5~10mm Motor input/output power: 120W/100W Power: 130W Protection class: IP21 Permissible ambient temperature and humidity: 5~40℃,80%RH Data interface: RS232