... .Certificates: CE, RoHS,FDAMovement Explaination:A float switch is a device used to sense the level of liquid in a tank ... energized or cut off the circuit, this will send the control board a signal that the liquid level is at the predetermined ... -cooler, BSD-P, humidifier, dehumidifier,fluid control,a pump,an indicator,an alarm,or other device. If there is no product suitable ...