Potter VSR-8 VSR Series Vane Type Waterflow Alarm Switch with Retard, 8" Nominal Pipe Size

Keep your fire protection and building monitoring systems responsive and reliable with the Potter Electric Signal VSR-8 vane type waterflow alarm switch. Designed for wet sprinkler systems, the VSR-8 delivers dependable waterflow detection on 8 in nominal steel pipe and actuates at flows of approximately 10 GPM downstream, providing early notification to fire alarm and security monitoring systems. The unit’s adjustable, instantly-recycling pneumatic retard helps prevent nuisance alarms by requiring a sustained flow before signaling, while two SPDT (form C) contacts enable simultaneous connection to a central fire panel and local notification devices—ideal for integrated fire, security and facilities monitoring. Housed in a rugged die-cast enclosure with tamper-resistant screws and available cover tamper option, the VSR-8 supports secure, code-compliant installations. UL Listed, FM Approved and LPC-approved, this Potter VSR Series switch streamlines specification for commercial and industrial fire protection projects. Specify the VSR-8 for reliable waterflow detection and improved system integrity—contact sales to order or confirm compatibility with your fire alarm and building security systems.

• Rapid detection of sprinkler activation to accelerate fire response and improve building safety
• Adjustable pneumatic retard reduces false alarms by requiring sustained flow before signaling
• Dual SPDT contacts allow simultaneous connection to fire panels and local notification or monitoring devices
• Robust die-cast enclosure with tamper-resistant screws secures internal switches for compliant installations
• UL, FM and LPC approvals and direct fit to 8 in nominal pipe simplify specification and inspection