THE DFC-2 DUAL FLOAT, PIGGY BACK SUMP PUMP SWITCH features a deluxe controller that monitors pump and power conditions and sounds an alarm when a problem is detected, such as a lack of AC power, or a ...
They use a buoyant float to gauge a fluid level. In most models, the float carries permanent magnets and encircles a stationary stem. As the float rises or drops with fluid level, the magnetic field ...
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