Compact Overhead Stirrer - Lab Mixer - 30-2200 rpm - 20 L Volume

The Master Science Compact Overhead Stirrer is sized for everyday bench mixing of batches up to 20 L. It handles samples up to 10000 mPa·s, which covers most solutions, suspensions and light emulsions found in research and QC labs.

Speed is set between 30 and 2200 rpm and shown on an LCD together with the remaining run time. The stirrer draws only 60 W.

Technical Specifications

Technical data for the Master Science Compact Overhead Stirrer:

• Brand: Master Science
• Model Number: MSOHS-50SWISS
• SKU: MSOHS-50SWISS
• Brand: Master Science
• Model Number: MSOHS-50SWISS
• SKU: MSOHS-50SWISS
• Maximum Mixing Volume (water): 20 L
• Speed Range: 30 to 2200 rpm
• Speed Accuracy: ±1 rpm
• Speed Display: LCD
• Speed Adjustment: Coarse and fine
• Timer: 1 to 9999 min
• Maximum Torque: 40 N·cm
• Maximum Viscosity: 10000 mPa·s
• Motor: Brushless DC
• Input / Output Power: 60 W / 50 W
• Protection Class: IP42
• Overload and Motor Protection: Fault shown on display, automatic stop
• Safety: Chuck protective cover, anti-slip pad
• Power Supply: 100 to 240 V, 50/60 Hz
• Ambient Conditions: 5 to 40 °C, 80 % RH
• Instrument Dimensions: 315 × 200 × 780 mm
• Net / Gross Weight (instrument): 4.4 kg / 6.5 kg
• Net / Gross Weight (set): 7 kg / 12.4 kg

Key Benefits

• Right size for routine work: the Master Science Compact Overhead Stirrer covers batches up to 20 L.
• Low power use: 60 W input.
• Constant speed: torque follows the change in sample viscosity.
• Protected motor: stops and shows a fault on overload or short circuit.
• Quick shaft change: the propeller shaft slides through the chuck.

For larger or thicker batches, see the Master Science 40 L laboratory overhead stirrer.

Product Features

Motor and Speed

• Brushless DC motor for long running
• 30 to 2200 rpm, ±1 rpm
• 40 N·cm torque

Display and Timer

• LCD with speed and time
• Timer from 1 to 9999 min
• Time can be changed while running

Protection

• Automatic stop with fault display
• Protective chuck cover
• Anti-slip pad

Applications

The Master Science Compact Overhead Stirrer is used in:

• University and research laboratories
• Pharmaceutical and cosmetic product development
• Food and beverage testing
• Paint, coating and chemical QC
• Biology sample preparation

Standard Accessories Included

• Overhead stirrer unit

Optional Accessories

• Stirring propellers
• Support stands and square lifting clamp

Common Laboratory Problems and How This Stirrer Helps

Problems the Master Science Compact Overhead Stirrer solves in daily use:

• Stir bars decouple in suspensions: direct shaft drive keeps mixing steady.
• No record of mixing time: the built-in timer runs up to 9999 min.
• Unattended runs and overloads: the motor shuts down safely.
• Limited bench space: compact head on a single stand.