What type of device is a flow switch classified as?

A flow switch is classified as an On/Off device because its primary function is to detect the presence or absence of fluid flow within a system, such as a water-based fire suppression system. When fluid flows through the switch, it typically closes an electrical circuit, signaling that the system is active. Conversely, if the flow is interrupted, the switch opens the circuit, indicating a lack of flow. This straightforward operation aligns perfectly with the characteristics of an On/Off device, which operates by toggling between two states based on specific conditions.

In fire alarm systems, the flow switch is crucial for activating alarms or notifying monitoring systems of water flow changes, ensuring that proper responses can be initiated in the event of a fire. Understanding the function of a flow switch as an On/Off device reinforces its role in fire protection and system monitoring.