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A magnetic stirrer or magnetic mixer is a laboratory device that employs a rotating magnetic field to cause a stir bar (or flea) immersed in a liquid to spin very quickly, thus stirring it. The rotating field may be created either by a rotating magnet or a set of stationary electromagnets, placed beneath the vessel with the liquid.
Founded in 1955 by Hans Heidolph, [5] Caframo is privately owned and manufactures products including laboratory overhead stirrers, specialty fans, heaters, thermoelectric fans, and thermoelectric lighting. [6] [7] The company name originally evolved from the development of Canadian Fractional Motors and the products that use them.
Schwabach, Germany. Heidolph Instruments, founded in 1938 [7] as a manufacturer of precision drive motors and engineering, is a manufacturer of laboratory equipment specializing in rotary evaporation, shakers, overhead stirrers, peristaltic pumps and magnetic hotplate stirrers.
The first mixer with electric motor is thought to be the one invented by American Rufus Eastman in 1885. [ 8 ] [ 9 ] [ 10 ] The Hobart Manufacturing Company was an early manufacturer of large commercial mixers, [ 11 ] and they say a new model introduced in 1914 played a key role in the mixer part of their business. [ 12 ]
Although the magnetic stirrer has lately come to replace the shaker, it is still the preferred choice of equipment when dealing with large volume substances, when simultaneous agitation is required or when stirring bar could destroy delicate content like living cells.
Overhead bins were filling up, flight crew was packing towels everywhere, and water (that we hoped was clean) just kept coming. Luckily, my seat was on the edge of the flood zone, so I was only ...