A magnetic stirrer is a laboratory device used to create a rotating magnetic field. This rotating field causes a magnetic stir bar (also called a flea or a stirring bar) placed within a liquid to spin, thus stirring the liquid. The stir bar is typically coated in PTFE (Teflon) or glass to make it inert and resistant to chemicals.
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A magnetic stirrer is a laboratory device used to create a rotating magnetic field. This rotating field causes a magnetic stir bar (also called a flea or a stirring bar) placed within a liquid to spin, thus stirring the liquid. The stir bar is typically coated in PTFE (Teflon) or glass to make it inert and resistant to chemicals.