Potter OSYSU-2 Supervisory Switch

  • Sale
  • Regular price $213.95



The OSYSU is used to monitor the open position of an OS&Y (outside screw and yoke) type gate valve. This device is available in two models; the OSYSU1, containing one set of SPDT (Form C) contacts and the OSYSU2, containing two sets of SPDT (Form C) contacts. These switches mount conveniently to most OS&Y valves ranging in size from 2" to 12" (50mm to 300mm). They will mount on some valves as small as 1/2" (12,5mm).

The cover is held in place by two tamper resistant screws that require a special tool to remove. The tool is furnished with each device and should be left with the building owner or responsible party. Replacement or additional cover screws and hex keys are available. See Ordering Information.


The OSYSU and its associated protective monitoring system should be inspected and tested in accordance with applicable NFPA codes and standards and/or the authority having jurisdiction (manufacturer recommends quarterly or more frequently).

Dimensions 6.19"L X 2.25"W X 5.88"H (15,7cm L X 5,7cm W X 14,6cm H)
Weight 2 lbs (0,9 kg)
Enclosure Cover Die-Cast, Finish - Red Spatter Enamel, Base - Die Cast Zinc
Cover Tamper Tamper Resistant Screws
Contact Ratings Two sets of SPDT (Form C) 15 Amps at 125/250VAC 2.5 Amps at 30VDC resistive
Environmental Limitations 40°F to 140°F (-40°C to 60°C) NEMA 4 and NEMA 6P Enclosure (IP67) Indoor or outdoor use (Not for use in hazardous locations. See Bulletin No. 5400705 OSYS-U-EX for hazardous locations)
Conduit Entrances 2 knockouts for 1/2" conduit provided
Service Use 32°F to 120°F (0°C to 49°C)
Humidity range Automatic Sprinkler NFPA-13, One or two family dwelling NFPA-13D, Residential occupancy up to four stories NFPA-13R, National Fire Alarm Code NFPA-72