Magnetic Stirrers & Lab Mixers

A larger hotplate and stronger motor handle bigger flasks, while a compact stirrer suits small-volume routine mixing.

Combined hotplate stirrers heat and mix at once, useful for reflux or dissolving work, while a plain stirrer suits room-temperature mixing.

A bar too large for its flask won't spin cleanly, while one too small won't mix effectively. Match bar length to flask diameter.

A vortex mixer is faster and simpler than a magnetic stirrer for quick mixing in test tubes or small vials.

Yes, many models combine a hotplate with the stirring function, letting you heat and mix at the same time, useful for dissolving solids or reflux work.

Usually the bar is mismatched to the flask size or the stirring speed is set too high for the bar to keep up, causing it to wobble or stop tracking the magnetic field.

A vortex mixer spins the whole tube rapidly for quick mixing, while a magnetic stirrer spins a bar inside a stationary container for longer, gentler continuous mixing.

Rinse it with water or a suitable solvent, then dry it before storing, since residue buildup can affect how well it spins next time.

Not strictly, but a retriever makes lifting a bar out of a beaker far easier and more hygienic than reaching in with tweezers or your fingers.