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19-0495-01, 230 V Code No. 19-0485-01) consists of two identical reservoirs mounted on a base plate; connection between the reservoirs is made via a valve. Mounted above the mixing reservoir is a motor unit which drives a stirrer blade. The outlet from the mixing reservoir to the column is fitted with a flow control valve, FCV-1. The Gradient Mixer is conveniently supported on a laboratory stand. Capillary tubing, 2 m, is also supplied. 2. Safety Warning! When using hazardous chemicals, all suit