Flow switches and tamper switches are devices used on sprinkler systems. Flow switches detect water movement or drop in pressure, and activate alarms. Tamper switches detect when a sprinkler valve has been partially to fully closed and usually activates a trouble signal at the control, although some cities require them activate alarms. Check with your local fire dept for their requirements.
![Flowswitch](https://i0.wp.com/firealarmsboston.com/wp-content/uploads/2013/04/WFD20.jpg?resize=250%2C250)
![Tamper switch](https://i0.wp.com/firealarmsboston.com/wp-content/uploads/2013/04/OSY2.jpg?resize=250%2C250)