OSY2 Supervisory Switches

The OSY2 supervisory switch monitors the open position of an Outside Screw and Yoke (OS&Y) type gate valve. The OSY2 provides robust construction, flexibility, simplified operation and reliable performance.


  • NEMA 3R rated enclosure
  • User-friendly mounting bracket fits newer valve yokes
  • Adjustable length actuator eliminates the need for cutting the shaft
  • Accommodates up to 12 AWG (3.31 mm²) wire
  • Three-position switch monitors vandal and valve-close signals
  • Two SPDT contacts are enclosed in a durable terminal block for added strength


Agency Listings and Approvals:

  • UL/ULC
  • FM Approved
  • CSFM
  • FDNY