Gas and earthquake sensor:

The performance of the system is such that when the sensor, gas or an earthquake, or both (depending on the type of solenoid valve is selected) felt, solenoid valve sends a command that will cut the gas path. As well as the solenoid valve when disconnecting, alarm also sounds to the user by pressing the button embedded on the control box, disconnect the alarm.

It should be mentioned that the type of sensors sensitive to earthquakes, also have the ability to turn off the gas.