Benchmark™ Overhead Stirrers
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 61 cm high.

Information:                                                                            Specifications:

LCD control panel
Compact and quiet
Digital accuracy and convenience
Includes: Stand assembly, 4-arm stainless propeller, Keyless chuck with protective cover

Model: OS-20L / OS-40L
Mixing Capacity (H20):	20L / 40L
Maximum Torque:	40Ncm / 60Nc
Input Power: 60W / 120W
Output Power: 50W / 100W
Net Weight (Mixer):	2.6kg / 2.8kg
Maximum Viscosity:	10000mPas / 50000mPas
Speed Range:	30-2200 rpm
Motor Type: DC brushless motor
Chuck Diameter Range:	0.5-10mm
Exterior Dims.: (WxDxH): 18.6 x 8.3 x 22.0 cm
Protection Mode: IP42
Ambient Operating Range:	5-40°C