OHS 200 Advance Overhead Stirrer
Safety and Durability for Your Lab
The OHS 200 Advance is VELP’s high-end overhead stirrer, designed to ensure the highest safety standards and resistance for your laboratory.
Safety Features:
- Integrated overload, overtemperature, and overcurrent safety alarms preserve the performance over time by stopping the stirring process when needed.
- Safe start and stop knob operation, along with a lock key, prevent unintended startup and changes of the working conditions.
- An integrated vibration sensor with different levels of sensitivity stops the operation and informs you to ensure that your OHS is stable and properly fixed.
Robust Construction:
- The OHS 200 Advance features a resistant sealed housing and an IP 54 Protection Rating, guaranteeing durability even in aggressive environments.
Best-in-Class Stirring Power:
- Ideal for demanding applications, the OHS 200 Advance operates with viscosities up to 100,000 mPa, stirring up to 100 L with a maximum torque of 200 Ncm.
- The brushless motor with SpeedServo™ torque compensation technology ensures constant torque at any speed, providing the best performance for both high torque and high volume operations.
SmartChuck Technology:
- The OHS Advance SmartChuck™ technology simplifies the shaft accommodation process, making it easy to use with just one hand and no tools required.
- With two simple operations, you can unlock the protection ring to drive the shaft in and out with maximum ease, ensuring safety during stirring.
Intuitive and Precise Control:
- The OHS 200 Advance features an intuitive 3.5” TFT Display, allowing you to precisely set your working conditions and get reproducible results.
- Monitor torque measurement on the display for real-time information on viscosity change with a resolution of 1 Ncm, and interact with the real-time graph showing speed, torque, and temperature of your test.
Temperature Control:
- The OHS Advance comes with a Pt100 temperature probe included, allowing you to constantly monitor the temperature of your reaction and set the instrument to reduce speed or interrupt the task if the temperature reaches a defined value.
Connectivity Options:
- The OHS Advance offers the possibility of controlling and monitoring processes through Wi-Fi connection to VELP Ermes and through USB.
- With VELP Ermes cloud platform, control the OHS Advance from PC, smartphone, and tablet through a simple and intuitive web interface. Alternatively, use the OHS/ControllerSoft™ software for USB connectivity.
OHS 200 Advance Overhead Stirrer Technical Specifications:
- Display: 3.5″ Graphic TFT Display
- User Interface: Digital
- Motor: Brushless DC
- Stirring Volume (H2O): Up to 100 L
- Speed Gears: 2
- Max Torque: 200 Ncm
- Stirring Speed Range: 6-400 rpm (Speed gear 1), 30-2000 rpm (Speed gear 2)
- Speed Setting Resolution: 1 rpm
- Speed Control: Digital
- Max Viscosity: 100,000 mPa*s
- Torque Compensation: SpeedServo™
- Chuck Range: Ø from 1 to 13 mm
- Shaft Diameter Pass-through: Up to 8.5mm
- Safety Vibration Sensor: Yes
- Timer: Yes
- Method Setting: Yes
- Lock of the Instrument: Yes
- External Probe Connection: Pt100
- Temperature Measuring Range: -200 to +550 °C
- Temperature Resolution: 0.1 °C
- Interfaces: USB / WiFi
- Dimensions (WxHxD): 90x315x235 mm (3.5×12.4×9.3 in)
- Weight: 4.6 kg (10.1 lb)
- Protection Class DIN EN 60529: IP 54





