... meter, electric meter, flow meter) to user or monitoring center by SMS(GSM DTU). (The Different from RTU5010 is the GSM Controller RTU5011with 8 Digital ... temperature up to appointed value, need switch on the air-conditioning immediately, or when water overflow and need ... Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas Leak Sensor, Glass Break Sensor, Shock Sensor, Power failure ...