... can be used for parking latch control, gsm gate opener, remote control machine, etc. An automation ... PLC and Automation, M2M;19. Access Control, Gate Opener, etc.>>>>>Mainly Features of the GSM Controller ... 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 ...