... protection;11. Valve controls;12. Wellheads;13. Energy saving, street lights control;14. Tanks, temperatures, water leakage;15. Transformer stations;16 ... Overflow Level 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, etc.>>>>>>>Why ...