Potter Electric Potter OSYSU-2, Outside Stem and Yoke Valve Supervisory Switch

The Potter Electric PL-OSYSU2 Outside Stem and Yoke Valve Supervisory Switch is used to monitor the open position of an outside screw and yoke type gate valve. The PL-OSYSU2 contains 2 sets of SPDT (Form C) contacts. These switches mount conveniently to most OS&Y valves ranging in size from 2 – 12-inches (50mm to 300mm). They will mount on some valves as small as 1/2-inch. The cover is held in place by two tamper-resistant screws that require a special tool to remove.