Potter WFSR-F Pressure Activated Waterflow Alarm Switch with Retard

Ensure dependable detection of sprinkler flow events while reducing nuisance trips with the Potter Electric Signal WFSR-F pressure-activated waterflow alarm switch with retard. Designed for wet sprinkler alarm check valve connections, the WFSR-F delivers consistent monitoring performance for fire protection, security and building systems. The unit ships factory-adjusted to operate between 5 and 8 PSI (0.35–0.55 BAR) and features a field-replaceable, adjustable 0–90 second pneumatic time delay to prevent false alarms from transient pressure fluctuations.

Built for contractors and facility managers, the WFSR-F combines a robust die-cast aluminum enclosure with NEMA 4 protection and 1/2" male NPT pressure connection for easy installation. Two SPDT (Form C) contacts rated at 15A @ 125/250VAC provide reliable interface to fire alarm control panels, security monitoring platforms and BMS integrations. Assembled in the USA, this waterflow switch supports accurate, low-maintenance sprinkler surveillance and fire protection workflows. Add the Potter WFSR-F to your next installation to improve alarm reliability and simplify system commissioning — contact us to specify or order.

• Minimizes false alarms with an adjustable 0–90 second pneumatic retard for stable, reliable sprinkler monitoring
• Fast integration into wet-pipe systems via 1/2" male NPT pressure connection and standard 1/2" conduit knockouts
• Heavy-duty die-cast aluminum housing and NEMA 4 rating protect electronics for long service life in demanding environments
• Dual SPDT (Form C) contacts (15A @ 125/250VAC) support direct connection to fire panels, security monitoring, and building management systems
• Field-replaceable retard and easy-read adjustment knob simplify commissioning and on-site maintenance