Amtron Class A Series Valve Monitoring Device Models 501 and 502 are designed to initiate a signal at appropriate supervisory equipment to indicate whether a valve is open or closed. The most common valves to which the valve monitoring devices can be fitted are outside screw and yoke valve, indicator gate valve, sluice valve and butterfly valve. Model 502 contains a self indicating LED which illuminates when actuated. See Technical Data Sheet for further information

 

These devices are listed in the CSIRO ActivFire Register of Fire Protection Equipment (listing numbers afp-822 and afp-823).