... DTU). (The Different from RTU5010 is the GSM Controller RTU5011with 8 Digital NC/NO inputs,8 relay drivable Outputs, 4 Analog inputs ... the other 3 inputs can be used as door sensor, motion sensor, temperature sensor, water overflow sensor, AC power failure ... Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor, Glass Break Sensor, Shock ...