Choosing a magnetic stir bar (also known as magnetic fleas) which is the right shape and size for your task can make the stirring action much more effective.
Use our guide below to choose a suitable magnetic stirring bar…
Choosing the right shape of magnetic stir bar will ensure the mixing is efficient and reduce wear and abrasion of the PTFE coating.
|Cylindrical Stir Bar||General purpose stirrer for|
|Plain Stir Bar||Similar to cylindrical, but with|
more turbulence at low speed.
|Pivot Ring Stir Bar||For use where the container base|
is slightly curved or uneven.
The pivot lets the stir bar adopt
the optimum position for stirring.
|Octahedral Stir Bar||Similar to the pivot ring type, but|
with more turbulence at low speed.
|Spherical Stir Bar||For stirring in test tubes or|
|Oval Stir Bar|| For use in round bottom flasks|
(aka boiling flasks)
|Cross Stir Bar|| Suitable for general purpose stirring|
but very stable to reduce “jumping”
|Crosshead Stir Bar|| For use in tube shaped containers or|
other containers – ideal when working
in both test tubes and beakers or flasks.
|Triangular Stir Bar|| For dissolving solids or mixing of|
sediments. The flat base gives a scraping
action for disturbing solids.
For more information on PTFE magnetic stir bars, just follow the links above or contact us