Laboratory Overhead Stirrer - Digital Mixer - 30-2200 rpm - 40 L Capacity

The Master Science Laboratory Overhead Stirrer is a digital mixer for liquid-liquid and solid-liquid samples, including medium and high viscosity materials up to 50000 mPa·s. A brushless DC motor drives the stirring shaft from 30 to 2200 rpm and holds the set speed as the sample thickens.

The large LCD shows speed and time, and a through-hole in the chuck lets you change the shaft position without moving the whole unit on its stand.

Technical Specifications

Specifications of the Master Science Laboratory Overhead Stirrer:

• Brand: Master Science
• Model Number: MSOHS-100SWISS
• SKU: MSOHS-100SWISS
• Brand: Master Science
• Model Number: MSOHS-100SWISS
• SKU: MSOHS-100SWISS
• Maximum Mixing Volume (water): 40 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: 60 N·cm
• Maximum Viscosity: 50000 mPa·s
• Motor: Brushless DC
• Input / Output Power: 120 W / 100 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): 4.7 kg / 6.5 kg
• Net / Gross Weight (set): 7.5 kg / 12.5 kg

Key Benefits

• Steady speed in thick samples: torque adjusts automatically as viscosity changes.
• Long, safe runs: the brushless motor of the Master Science Laboratory Overhead Stirrer suits continuous operation.
• Built-in protection: overload or a short circuit cuts power and shows an alarm.
• Faster setup: the shaft passes through the chuck, so instrument height stays fixed.
• Accurate timing: set runs from 1 minute to almost 7 days.

For smaller volumes, see the Master Science laboratory magnetic stirrer.

Product Features

Drive

• Brushless DC motor
• 30 to 2200 rpm with ±1 rpm accuracy
• 60 N·cm maximum torque

Control

• LCD speed and time display
• Coarse and fine speed setting
• Working time adjustable during the run

Safety

• Overload and motor protection with alarm
• Chuck cover and anti-slip pad

Applications

Typical uses of the Master Science Laboratory Overhead Stirrer:

• Chemical and petrochemical research
• Pharmaceutical formulation
• Cosmetic creams and emulsions
• Food and biological samples
• Polymer and resin mixing

Standard Accessories Included

• Overhead stirrer unit

Optional Accessories

• Stirring propellers in various designs
• Support stands and square lifting clamp

Common Laboratory Problems and How This Stirrer Helps

How the Master Science Laboratory Overhead Stirrer handles typical mixing issues:

• Magnetic stirrers stall in thick samples: overhead drive with 60 N·cm torque keeps mixing.
• Speed drops as viscosity rises: torque compensation keeps rpm stable.
• Motor burnout: automatic stop on overload.
• Readjusting height for each vessel: the through-chuck design avoids it.