A magnetic stirrer is one of the few instruments that runs for hours in almost every lab, so the cost of choosing badly shows up as uneven mixing, cracked glassware or a failed overnight reaction. Use this guide to match the stirrer to your volume, viscosity and temperature range before you compare prices.
| Working volume | Typical vessel | Recommended format |
|---|---|---|
| 10–500 mL | Beaker, flask, bottle | Compact hotplate stirrer |
| 500 mL–5 L | Round-bottom flask, reaction vessel | Hotplate stirrer with strong magnet and clamp stand |
| Multi-vessel screening | Several small flasks | Multi-position or 6-position stirrer |
| Sub-ambient reactions | Jacketed vessel | Low-temperature stirrer / reaction bath |
Heating-only hotplate stirrers cover most buffer, media and dissolution work. If your protocol needs sub-ambient conditions, choose a model with a cooling range that brackets your set point — not one that only reaches 0 °C. The ACESUN range includes low-temperature reaction baths at −40 to 40 °C and −80 to 20 °C for colder chemistry.
| Model | Type | Typical use |
|---|---|---|
| BMS-14 | Hotplate magnetic stirrer | General heating and stirring |
| BMS-14C | Controlled hotplate stirrer set | Parallel reactions with double-layer holder |
| HCC-4005 / HCC-4020 | Low-temperature stirring reaction bath | −40 to 40 °C work |
| HCC-8005 / HCC-8020 | Low-temperature stirring reaction bath | −80 to 20 °C work |
Exact speed range, plate material, temperature stability and vessel capacity depend on the model. Ask for the current datasheet before you specify a unit for a validated process.
Water-like buffers are easy. Gums, slurries, polymer solutions and cell suspensions are not. For viscous liquids, use a larger, heavier stir bar and a stirrer with a stronger magnetic coupling; reduce the volume or use an overhead stirrer if the vortex still stalls. A bar that spins erratically at the bottom of a flask is not mixing the bulk.
We supply ACESUN stirrers and reaction baths to laboratories in Singapore, with local stock for common models and regional supply for larger systems. Tell us the vessel, volume, temperature range and whether the application is validated; we will shortlist the model and confirm lead time.
For a 2 L working volume, choose a stirrer rated for at least that volume and use a suitably sized stir bar. For viscous liquids, step up to a stronger model or an overhead stirrer.
Not directly on the culture vessel unless the vessel is designed for it. For cell work, use a stirrer designed for gentle mixing or a dedicated spinner flask system.
A hotplate stirrer heats on a plate; a reaction bath circulates a temperature-controlled fluid around a jacketed vessel, giving tighter and sometimes sub-ambient control.
Yes, models covering −40 to 40 °C and −80 to 20 °C are available. Confirm the exact model and temperature stability for your protocol.
Match the bar length to the vessel diameter, use a heavier bar for viscous liquids, and avoid bars with damaged coating when working with sensitive samples.
Tell us the sizes, quantities and sterility requirements. We reply within 2 hours on business days.
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