Observe or ), permanent magnet stir pubs work well in cup vessels.
Since will not influence a considerably (it is usually transparent to magnetism), and most chemical responses take place in glass boats (we.e. The rotating industry may be created either by a rótating or a set of stationary electromagnets, placed beneath the vessel with the liquid. From Wikipedia: A permanent magnet stirrer or magnetic mixer can be a lab gadget that uses a rotating permanent magnet industry to trigger a (also called 'flea') immersed in a liquid to spin very quickly, thus mixing it.