The Potter WFSRF is a pressure operated switch with an adjustable, instantly recycling pneumatic retard to prevent false alarms due to water pressure variation.

4 – 20 psi - Alarm Pressure Switch

High/Low Pressure Supervisory Switch, Two SPDT, 10–100 PSI

Post Indicator/Butterfly Valve Supervisory Switch

Monitors non-rising stem gate and ball and angle valves

Used to monitor the open position of an Outside Screw and Yoke (OS&Y) type gate valve