Tamper Supervisory Switch (OSYSU)

The Tamper Supervisory Switch (OSYSU) is designed to monitor the open position of OS&Y (Outside Screw & Yoke) gate valves in fire protection systems. It provides reliable supervisory monitoring by detecting valve tampering or closure, ensuring compliance with NFPA 72 requirements. Suitable for fire sprinkler systems, fire pump rooms, and commercial or industrial fire protection applications.

Key Features

• Brand: Potter
• Models: OSYSU-1 & OSYSU-2
• Monitors OS&Y gate valve open position
• One or two SPDT (Form C) contact options
• Fits most 2″–12″ OS&Y valves (also compatible with some ½” valves)
• Detects valve tampering and closure
• NEMA 4X (IP65) & 6P (IP67) enclosure
• Visual switch status indicators
• Adjustable trip rod for easy installation
• Tamper-resistant cover with security screws
• Operating Temperature: -40°C to 60°C
• Complies with NFPA 72 fire alarm supervisory requirements