Potter OSYSU-1, Outside Stem and Yoke Valve Supervisory Switch

The Potter OSYSU-1 is an Outside Stem and Yoke (OS&Y) valve supervisory switch designed for monitoring the open position of an OS&Y gate valve in fire protection systems. It is UL listed and FM approved, ensuring dependable performance in life safety applications. The switch activates when the valve is operated, sending a supervisory signal to a fire alarm control panel. It features a weatherproof NEMA 3R enclosure for outdoor use, a tamper-resistant cover, and adjustable mounting to fit valves ranging from 2" to 12" in size. Its robust construction and flexible design make it suitable for a wide range of commercial and industrial environments. The OSYSU-1 helps ensure compliance with NFPA requirements and supports early detection of valve tampering or accidental closure, contributing to the reliability and integrity of fire sprinkler systems.