... pipelines; 10. Corrosion protection11. Temperatures, water leakage applications;12. Wellheads, boat, vehicle ... accept to the alarm message; Two-way voice communication by external microphone ... Water 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 ...