... with relay activation.) This can be used for parking latch control, gsm gate opener, remote control machine, etc. An automation system. ... Disarm button, the other 3 inputs can be used as door sensor, motion sensor, temperature sensor, water overflow sensor, AC ... Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor, ...