Image display of flow switch:

The main purpose of a flow switch is to:
A flow switch is a device that commands the system to switch based on the flow rate, setting an upper or lower limit for the flow switch. When the flow rate reaches this limit, the flow switch sends a signal or alarm, and the system will run or stop. Generally, systems that require flow will use flow switches.
Depending on the different systems and factors such as the type of flow switch, the usage location may vary and should be determined according to specific circumstances.