Laboratory Stirrers
Types of Laboratory Stirrers
Choosing the correct stirring device begins with understanding the sample viscosity, vessel size, and operational requirements. At Borosil Scientific, we manufacture a complete range of stirring equipment to meet different application profiles.
| Stirrer Type | Model/Range | Capacity | Key Features |
| Magnetic Stirrer | Stir Only | 2 L, 5 L, 20 L | Quiet operation, durable motor, compact form |
| Hotplate Stirrer | Heat & Stir | 2 L, 5 L, 20 L | Integrated heating with stirring, LED digital display |
| Multi-position Stirrer | Magnetic Hot Plate | Multiple | Parallel stirring points with individual control |
| Overhead Stirrer | OHS Series | Up to 100 L | Brushless DC motor, overload protection, reversible motion |
Magnetic Stirrers are ideal for routine mixing of low-viscosity solutions. The models from Borosil Scientific include single-position and multi-position systems with heating capabilities where thermal control is critical. Our top plates come in SS or aluminium, depending on thermal load.
Overhead Stirrers cater to viscous or dense media. Borosil Scientific’s OHS Series uses microprocessor-driven BLDC motors, delivering consistent torque. Units have overload protection and reversible motion settings, which are critical for complex dispersion tasks.
How Laboratory Stirrers Work?
Stirrers work on either magnetic or mechanical motion. Magnetic stirrers use rotating fields to drive a stir bar, while overhead stirrers engage with an impeller shaft directly in the solution. Hotplate stirrers combine thermal and mechanical functions.
| Feature | Magnetic Stirrer | Overhead Stirrer |
| Drive Type | Magnetic Field | Mechanical Shaft |
| Max Volume | 2–20 L | Up to 100 L |
| Heating | Optional | External only |
| Ideal For | Clear, low-viscosity fluids | High-viscosity or suspended particles |
All Borosil Scientific stirrers are designed for long-duration operations in GMP/GLP-compliant labs. The platforms are chemically resistant, and the control systems are PID-based, delivering tight control over RPM and temperature.
Choosing the Right Lab Stirrer for Your Needs
The decision to select a stirrer should be based on:
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Viscosity of Sample: High-viscosity media, like gels or slurries, require overhead stirrers.
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Batch Volume: Multi-position magnetic stirrers are suited for multiple small-scale tests; overhead stirrers for scale-up.
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Heating Requirement: Hotplate stirrers from Borosil Scientific offer fast thermal ramp-up and precise hold temperature.
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Control Features: Digital LED displays, RPM control, and programmable timing provide consistent process outcomes.
| Requirement | Suggested Product |
| Low-viscosity, non-heated | Magnetic Stirrer (Stir Only) |
| Low-viscosity, heated | Magnetic Hot Plate Stirrer (2L, 5L, 20L) |
| Parallel small batches | Multi-position Magnetic Stirrer |
| High-viscosity or bulk | Overhead Stirrer (OHS Series) |
Applications of Laboratory Stirrers in Laboratories
Laboratory stirrers are routinely used in:
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Sample preparation
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Solvent extraction
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Dissolution studies
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Nutrient media formulation
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Viscosity testing
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Catalyst dispersal
Borosil Scientific’s stirrers are engineered for durability and consistency. Our overhead stirrer supports up to 100 L, with overload detection and variable speed control. Multi-position stirrers are ideal in QA/QC departments where parallel samples are required to run under identical conditions.
| Laboratory Function | Suitable Stirrer Type | Borosil Scientific Model |
| Buffer preparation | Hotplate Stirrer (5L) | Magnetic Hot Plate (Heat & Stir) |
| Emulsion studies | Overhead Stirrer | OHS Series |
| Stability tests | Magnetic Stirrer | Stir Only |
To choose the right lab stirrer for your experiments, assess volume, viscosity, and whether heating is needed. A standard magnetic stirrer works if you’re working with small samples that require only mixing. If the sample is large or highly viscous, an overhead stirrer from Borosil Scientific with overload protection and an adjustable impeller shaft is better.
Stirrers provide consistent mixing speed and eliminate operator variability. Borosil Scientific stirrers also allow for programmable timing and digital control, offering repeatability and reducing contamination risk.
Lab stirrers from Borosil Scientific are built for durability and long-term use. With regular servicing and proper handling, they deliver consistent performance across extended laboratory operations, even in demanding environments.
The cost can vary depending on the type and features. Basic magnetic stirrers are more economical, while overhead stirrers with digital controls, heating options, or programmable settings are priced higher due to their advanced capabilities.