For labs requiring intense mixing of viscous or large-volume solutions, the overhead stirrer is indispensable. Unlike magnetic stirrers, it’s built for heavy-duty tasks involving dense substances and long mixing times.
What is an Overhead Stirrer?
An overhead stirrer uses a motor-driven shaft and stirring paddle to mix solutions. The stirring element is submerged in the sample, and the motor (mounted above the vessel) rotates the shaft, effectively mixing contents.
Ideal Use Cases
- High Viscosity Solutions: Gels, emulsions, or slurries.
- Large Volume Mixing: Suitable for 5L to 100L containers.
- Continuous Operation: Capable of running for hours without overheating.
Key Features
- Variable Speed Control: For gentle stirring to vigorous agitation.
- Torque Capacity: High-torque models handle thick substances better.
- Digital Display: Provides real-time speed and time feedback.
Applications
- Chemical Synthesis: Mixing of solvents and reagents.
- Pharmaceutical Formulation: Preparing suspensions and syrups.
- Food and Beverage Testing: Stirring sample matrices.
- Paint and Ink Research: Homogenizing pigments and additives.
Advantages
- Precision Control: Maintain exact stirring speeds.
- Durability: Built for industrial and laboratory longevity.
- Compatibility: Works with a wide range of vessels.
Maintenance Tips
- Use appropriate stirring rods for different viscosities.
- Clean paddles after use to avoid contamination.
- Ensure the stirrer is mounted securely before operation.
Conclusion
Overhead stirrers provide unmatched mixing power and control. They’re ideal for demanding applications and large sample volumes, making them a reliable choice for research and production labs alike.
