... gas pipelines by a SMS based on GSM( 4 Input / 2 Output / USB Ports ) The GSM SMS Controller-Alarm is a very simple device ... mobile phone and protect your assets. Moreover, the GSM SMS Controller-Alarm with 4 digital inputs, when any one of the inputs triggered ... Overflow Level Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, Door Sensor, PIR Motion Sensor, Smoke Sensor, Gas ...