Company’s Rotation Switch Series is designed for level sensing of low-density and potentially-explosive powders. Each unit uses a rotating vane as a sensor to detect the level of a dust or powdered material. The vane is turned slowly by a brushless synchronous motor. As long as the level of the powder remains below the vane, the vane is free to turn. If the powder rises to the level of the vane, this stops the rotation. A switch turns off the synchronous motor and produces an output for an external control system. The vane sensing system means the Rotation Switch can be used for powdered materials with low densities (greater than 100 g/l or 6 lb/ft3).
Hawk Measurement America, Ste. B7, 3911 W. Van Buren, Phoenix, AZ 85009.
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