Supervisory Switch for Post Indicator or Regulating Type Valves

This supervisory switch is intended for use with post indicator or regulating type valves. It is used to detect unauthorized operation of a main control valve in a sprinkler or standpipe system by transmitting an electrical impulse to activate an audible or visual alarm. It includes a red tamperproof cover 0.5” (1.2 cm) pipe mounting nipple and two single-pole double-throw micro switches.