It is used as an electrical contact to automate any type of operation in the event of a fire(e.g., stop the fans, close the hatches, etc.). It can also be connected to the fire panel to send an actual discharge signal from the extinguisher agent.
PRESSURE SWITCH FOR DRY PIPING:
PRESSURE SWITCH FOR WET PIPING:
Pressure switches are available in NO contacts (normally open) or NC contacts (normally closed).
This application is quite useful in cases where agent is released accidentally (without activating the fire detection system), keeping this situation from going unnoticed and the proper measures being taken.