This is called a Low Pressure Alarm.
The Low Pressure Alarm is featured with several analog meters and shows pressure of the assorted gases coming from the pipe lines. It makes suitable alarm in case of low pressure and ensures BMS connectivity. This is provided with an accurate on line digital display and factory graduated pressure sensors. Also, it has an audible alarm that warns in the occurrence of low pressure condition. It is also provided with a mute facility so as to improve your convenience. Provided Low Pressure Alarm has the provision to be connected to various other remote slave alarms.