Magnetic Stirrer OS20-Pro (CAT#: STEM-BC-2268-ZJF)

The OS20-Pro is a compact magnetic stirrer designed for continuous and efficient mixing of liquid samples in standard laboratory vessels. It employs a strong permanent magnet assembly to drive a PTFE-coated stir bar placed inside the vessel, producing consistent fluid motion without direct mechanical contact. The brushless DC motor provides smooth, quiet, and maintenance-free operation across the full speed range. A uniform parallel magnetic field ensures consistent stirring performance regardless of stir bar position on the working surface. The chemical-resistant working plate is constructed to withstand spills of common laboratory solvents and reagents. Speed is adjusted via a rotary dial or digital interface, depending on the model, allowing precise control. The instrument is suitable for low-viscosity liquid mixing, dissolution, and routine sample preparation. Its compact footprint makes it appropriate for bench-top use in space-constrained laboratory environments. The unit is compatible with a wide range of vessel types including flasks, beakers, and bottles. It is commonly used in chemistry, biochemistry, pharmaceutical, and educational laboratory settings.

Maximum stirring volume: 20L
Speed range: 50-2200rpm
Rotation speed: ±3rpm
Speed display: LCD
Display: LCD
Data interface: RS232
Enclosure protection rating: IP21
Motor output power: 50W
Power: 70W
Power supply: 100-240V, 50/60Hz
Weight: 2.8kg
Operating temperature range: 5-40°C

DC brushless motor for maintenance-free, spark-free operation
LCD display for simultaneous readout of parameters
Explosion-proof design for enhanced laboratory safety
Rated enclosure protection (IP) against dust and moisture ingress
RS-232 data interface for PC-based monitoring and recording
Maintenance-free design for long operational life
Certified to international safety standards (CE/FCC/TUV)
LCD or LED display for real-time speed monitoring

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