Magnetic Stirrer

A magnetic stirrer or magnetic mixer is a laboratory device that employs a rotating magnetic subject to reason a stir bar (additionally called "flea") immersed in a liquid to spin very quickly, for that reason stirring it. The rotating area may be created either by means of a rotating magnet or a fixed of desk-bound electromagnets, placed underneath the vessel with the liquid.

Magnetic stirrers are often used in chemistry and biology, in which they can be used inside hermetically closed vessels or structures, without the need for complex rotary seals. they are favored over equipment-driven motorized stirrers because they're quieter, extra efficient, and don't have any transferring external parts to break or put on out (aside from the simple bar magnet itself). Magnetic stir bars paintings well in glass vessels commonly used for chemical reactions, as glass does no longer considerably have an effect on a magnetic subject. The restrained size of the bar means that magnetic stirrers can handiest be used for quite small experiments, of 4 liters or less. Stir bars also have difficulty in handling viscous liquids or thick suspensions. For large volumes or extra viscous beverages, a few forms of mechanical stirring is commonly wanted.

Because of its small size, a stirring bar is more effortlessly wiped clean and sterilized than different stirring gadgets. They do no longer require lubricants that can contaminate the response vessel and the product. Magnetic stirrers might also include a warm plate or some other method for heating the liquid.

Magnetic Stirrer


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