... can be used as door sensor, motion sensor, temperature sensor, water overflow sensor, AC power failure sensor, oil pressure sensors, etc. ... Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor, Glass Break Sensor, Shock Sensor, Power failure sensor, ... Temperature UP DOWN remote control,24V DC Switch,NC NO sensor control