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Laboratory stirrers designed to stir liquids by immersing a rotating gear inside the container of liquid to be stirred. These stirrers typically consist of a tabletop electromechanical device with a small unit that is mounted at the top of a small post on a base; the unit also includes a motor with an attached stirring shaft that is immersed in the liquid and appropriate speed and/or time controls. Some stirrers include a plate on which the container of liquid is placed. Motorized laboratory stirrers are used in clinical laboratories to stir solutions of any volume; dedicated motorized stirrers are particularly suitable to stir medium- and/or high-viscosity liquids. Some stirrers are intended for handheld use, and others may be used either fixed to the post or as handheld devices.
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