Supervisory Switches
Function: Used to detect unauthorized operation of a main control valve in a aprinkler or standpipe system. Transmits an electrical impulse to activate audible or visual alarm.
Model 6221
For use with rising stem Globe valves from ½"/1.2cm thru 2½"/6.4cm. Red, tamper-proof cover, with collar and mounting bracket. One single-pole, single-throw microswitch.
