POTTER PCVS-2-CRHeBayProduct Overview The Potter PCVS 2 CRH is a weatherproof and tamper resistant switch designed to monitor the open position of fire sprinkler control valves, including wall post indicator and butterfly types. The unit features two SPDT (Form C) contacts that activate when the valve moves from the fully open position. The switch mounts directly into a 1 2" NPT tapped hole in the valve housing and engages with the valves indicating assembly or