Magnetic Stirrers are benchtop laboratory instruments used to mix compatible liquids with a magnetic stir bar placed inside the vessel. This range includes compact, ultra-flat, heated, non-heated and multi-channel models, with stated mixing capacities ranging from small sample volumes up to 20 L.
A rotating magnetic field beneath the work plate moves the stir bar and circulates the liquid without using an overhead shaft. Stirring performance depends on the sample volume, viscosity, vessel shape, stir-bar size and selected speed. The University of Minnesota recommends checking that the stir bar remains correctly coupled to the drive magnet, as loss of coupling can cause splashing, poor mixing or vessel damage.
Single-position models suit individual vessels, while multi-channel stirrers allow several samples to be mixed at the same time. Heated models support simultaneous stirring and temperature control. Michigan State University laboratory guidance also notes the use of magnetic stir bars for controlled mixing in reaction and reflux setups.
Users should confirm the stated capacity, speed range, work plate dimensions, heating function and vessel compatibility before ordering. Heated magnetic stirrers should be operated on a stable bench, with flammable materials kept away from hot surfaces and potential ignition sources. Princeton University advises that magnetic stirrers and other mixing equipment should be operated in a way that reduces electrical spark hazards.
ASTM E3264 provides guidance for evaluating and supporting the homogeneity of laboratory samples and bulk materials. It is relevant where consistent sample mixing is important, but it should not be presented as a confirmed compliance standard for a magnetic stirrer unless supported by manufacturer documentation.
For LabChoice Australia customers, the Magnetic Stirrer range provides practical options for schools, universities, research facilities and quality control laboratories carrying out solution preparation, dissolution, reagent mixing and routine sample homogenisation.





















