The OSYSU is used to monitor the open position of an OS&Y (outsidc scrcvv and yoke) type gâte valve. This device is available in tvvo models; the OSYSU-1, containing one set of SPDT (Fonn C) contacts and the OSYSU-2. containing two sets of SPDT (Fonn C) contacts. These switches inount conveniently to most OS&Y valves ranging in size from 2” to 12” (50min to 300mm). Thcv will mount on some valves as small as Vf* (12,5mm).
The cover is held in place by two tamper résistant screws that require a spécial tool to remove. The tool is fumished with each device.

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