Potter OSYSU-1eBayProduct OverviewThe Potter OSYSU Series Outside Screw and Yoke (OS&Y) Valve Supervisory Switch is designed to monitor the open position of OS&Y type gate valves. It is available in two configurations: the OSYSU 1, with one set of SPDT (Form C) contacts, and the OSYSU 2, with two sets of SPDT (Form C) contacts. The switches are compatible with most OS&Y valves ranging from 2 to 12 (50mm to 300mm), and can even fit valves as small as (12. 5mm). The
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