... Wellheads, boat, vehicle;13. Energy saving, street lights control system;14. Valve controls;15. Transformer stations; 16. Unmanned ... machine rooms;17. Control room application;18. Automation System, M2M;19. GSM Access Control System, GSM Gate Opener, etc. ... X 1GSM Antenna X 1Optional Accessories:Water Overflow Level Sensor, Oil Overflow Level Sensor, Water Leak Sensor, Temperature Sensor, ...