Potter VSR-C2.5 VSR Series Vane Type Waterflow Alarm Switch with Retard for Copper Pipe, 2-1/2" Pipe Size

Protect your facility with dependable waterflow detection engineered for fire protection and security monitoring. The Potter Electric Signal VSR Series vane-type waterflow alarm switch (VSR-C2.5) gives facility managers and integrators a rugged, field-proven device to detect sprinkler discharge on wet systems and reliably signal control panels and monitoring centers. The VSR features adjustable pneumatic retard to avoid nuisance alarms and trips only when flow meets the UL sensitivity range — typically 4–10 GPM with actuation at approximately 10 GPM — ensuring accurate detection without compromising safety. Two SPDT (Form C) switches allow separate notification and supervision circuits, simplifying integration with fire alarms, building security, or remote surveillance and monitoring systems. Built with a NEMA 4 / IP54 die-cast enclosure and tamper-resistant cover, the unit is suitable for indoor or outdoor service and is supplied with a non-corrosive saddle sleeve for secure 2-1/2-inch copper pipe installation. Ideal for commercial buildings, data centers, parking structures and multi-site security applications. Order the Potter VSR-C2.5 to enhance your sprinkler monitoring and life-safety system today.

• Instant, reliable sprinkler flow detection that reduces false alarms and speeds response for building safety
• Adjustable pneumatic retard prevents nuisance trips while meeting 4–10 GPM sensitivity requirements for accurate monitoring
• Dual SPDT contacts for flexible integration with fire panels, security systems and remote monitoring platforms
• NEMA 4 / IP54 die-cast enclosure and tamper‑resistant cover for durable indoor/outdoor protection and vandal-resistant installation
• Designed for 2-1/2-inch copper pipe installs with factory-installed non-corrosive sleeve for fast, code-compliant hookup