Potter VSR-F-EX-4 Vane Single Pole Double Throw 4"

Ensure dependable waterflow detection in hazardous wet-pipe sprinkler systems with the Potter Electric Signal VSR-F-EX-4 explosion-proof vane waterflow switch. This flow switch delivers fast, reliable notification of downstream movement of 10 gpm (38 Lpm) or greater, helping protect life, property and critical infrastructure. Built for demanding environments, the VSR-F-EX-4 features a NEMA 4/IP66 solid metal enclosure and explosion-proof construction so it performs where standard devices cannot.

Designed for integrators and facilities managers, the unit includes two single pole double throw (SPDT) switches for separate alarm and supervisory circuits, plus a field-replaceable 0–90 second pneumatic retard to reduce nuisance trips during transient flows. The non-corrosive saddle bushing and 1/2" threaded conduit entries streamline installation and maintenance, while American assembly ensures quality control. Whether used as a sectional detector on large systems or as primary flow monitoring in hazardous locations, this Potter waterflow switch integrates smoothly with fire alarm, security and building monitoring systems. Specify the VSR-F-EX-4 for reliable, code-compliant monitoring — contact your supplier or order today.

• Reliable hazard-area detection: explosion-proof vane switch designed for wet-pipe sprinkler systems to reduce false alarms and ensure rapid incident response
• Adjustable field retard (0–90 s): tune the pneumatic delay to avoid nuisance trips while meeting system monitoring requirements
• Rugged NEMA 4/IP66 housing: durable, corrosion-resistant enclosure for outdoor and wet environments, supporting long-term performance
• Dual SPDT switches: separate alarm and supervisory contacts simplify integration with fire alarm control panels and building monitoring systems
• Easy maintenance and installation: field-replaceable retard, 1/2" conduit connections and non-corrosive saddle bushing minimize downtime
• Sectional detection capability: ideal for large systems needing localized flow monitoring in hazardous locations