Product Name: Osysu-1 Outside Screw and Yoke Valve Supervisory Switch Model NO.: osysu-1 Media Type: Liquid Type: Infrared Water Certification: UL, CCC, ISO9001, FM IP Rating: IP50 Trademark: SYSTEM SENSOR Transport Package: Carton Specification: 2''-8'' Origin: China HS Code: 9026900000 Product Description The OSYSU is used to monitor the open position of an OS&Y(outside screw and yoke) type gate valve. This device isavailable in two models; the OSYSU-1, containing one setof SPDT (Form C) contacts and the OSYSU-2, containingtwo sets of SPDT (Form C) contacts. These switches mountconveniently to most OS&Y valves ranging in size from 2" to12" (50mm to 300mm). They will mount on some valves assmall as ½" (12,5mm).The cover is held in place by two tamper resistant screws thatrequire a special tool to remove. The tool is furnished with eachdevice and should be left with the building owner or responsibleparty. Replacement or additional cover screws and hex keys areavailable. See Ordering Information