What is the main function of a flow switch in a sprinkler system?

The main function of a flow switch in a sprinkler system is to detect water flow and send an alarm signal. When water flows through the sprinkler system, the flow switch senses this activity. If water is flowing, particularly during the activation of the system to extinguish a fire, the device triggers an alarm to alert occupants and emergency responders of the situation. This immediate notification is critical for safety and proper emergency response. Unlike other systems or components in the sprinkler setup, the flow switch does not typically engage in controlling water temperature, pressure, or shutting off the system; its singular and vital role revolves around monitoring flow and signaling when that flow occurs.