Potter VSR-2 1/2 VSR Series Vane Type Waterflow Alarm Switch with Retard, 2.5" Nominal Pipe Size

Put dependable sprinkler monitoring at the heart of your fire protection strategy with the Potter Electric Signal, LLC VSR-2.5 vane-type waterflow alarm switch. Designed for wet sprinkler systems, this VSR series device delivers fast, reliable notification of downstream flow — helping protect assets, reduce downtime, and support quicker emergency response. The VSR-2.5 is UL Listed and FM Approved for use on steel pipe and is sensitive to flows in the UL range (4–10 GPM) with switches that actuate at approximately 10 GPM. An adjustable, instantly recycling pneumatic retard prevents nuisance trips from transient surges while two SPDT switches provide flexible wiring for separate alarm and supervisory circuits. The rugged, tamper-resistant die-cast enclosure and optional cover tamper switch enhance security and maintain system integrity in commercial installations. Ideal for integration into fire alarm monitoring, security, and building management systems, the Potter VSR-2.5 is a practical choice for contractors and facilities managers specifying reliable waterflow detection. Add this VSR series switch to your next wet sprinkler project to improve monitoring and compliance — order now or contact us for system integration guidance.

• Reliable, early detection of sprinkler flow to minimize property damage and speed fire alarm response
• Adjustable pneumatic retard reduces false alarms from transient surges for accurate monitoring
• Tamper-resistant die-cast housing protects internal switches and secures system integrity
• Two SPDT switches allow separate circuits or dissimilar voltages for flexible system integration
• UL, FM and LPCB approvals ensure compliance with commercial fire protection and security monitoring standards