Potter VSR-5 VSR Series Vane Type Waterflow Alarm Switch with Retard, 5" Nominal Pipe Size

Potter Electric Signal's VSR-5 vane type waterflow alarm switch provides dependable, code‑compliant detection for wet sprinkler systems, helping protect facilities and supporting building security and fire monitoring strategies. The VSR-5 mounts directly to a 5" nominal pipe and actuates at approximately 10 GPM (38 LPM), delivering consistent notification of sprinkler flow conditions. With two SPDT (form C) switches and an adjustable, instantly recycling pneumatic retard, it reduces nuisance alarms while providing reliable contacts for fire alarm control panels and remote monitoring systems.

Built for indoor and outdoor use, the VSR-5 is UL Listed and FM Approved, equipped with a tamper‑resistant die‑cast housing and two 1/2" conduit knockouts for straightforward installation and serviceability. Its clear terminal design and individual switch compartments make integration with security, surveillance and central monitoring networks simpler for contractors and facilities teams. Ideal as a primary flow switch or a sectional detector on larger systems, the VSR-5 combines rugged performance with practical features to streamline commissioning and maintenance. Specify the Potter VSR-5 for improved sprinkler monitoring and reliable fire detection—contact us to add it to your next fire protection design.

• Reliable sprinkler monitoring: Detects downstream flow to trigger alarms and integrate with fire alarm panels for faster response.
• Adjustable retard for nuisance reduction: Pneumatic, instantly recycling delay minimizes false alarms during transient flows.
• Code‑compliant and field‑ready: UL Listed and FM Approved with tamper‑resistant cover and two 1/2" conduit knockouts for simple installation.
• Robust, serviceable design: Two SPDT contacts and clear terminal IDs allow easy wiring for dissimilar voltages and maintenance.
• Versatile pipe mount: Designed for 5" nominal steel pipe and usable as a sectional detector on large wet sprinkler systems.