What does the term "flow switch" refer to in sprinkler systems?

In sprinkler systems, the term "flow switch" specifically refers to a device designed to detect the flow of water within the system. When water flows through the pipes, the flow switch senses this movement and activates an alarm. This is a critical function in fire protection systems, as the detection of water flow typically indicates that the sprinkler system has been activated due to a fire, thereby alerting occupants and emergency services of the situation.

The ability of the flow switch to provide immediate information about water movement plays a crucial role in ensuring safety and minimizing damage during a fire event. It enhances the responsiveness of the overall fire protection system by ensuring that alerts are given promptly as the sprinklers engage.