{"product_id":"wfsr-f-potter-pressure-activated-waterflow-alarm-switch-with-pneumatic-retard","title":"WFSR-F | Potter Pressure-Activated Waterflow Alarm Switch with Pneumatic Retard","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003eThe Potter WFSR-F is a pressure-activated waterflow alarm switch with pneumatic retard designed for automatic sprinkler systems. It detects rising water pressure associated with sprinkler activation and initiates an alarm signal for system notification.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 411.47px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003ePotter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eFire Sprinkler Equipment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eWFSR-F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eWaterflow Alarm Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003ePressure-activated waterflow switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eActivation Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003ePressure rise, 5–8 PSI (0.35–0.55 BAR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003ePressure Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003e½” Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eSystem Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003e175 PSI (12.1 BAR) maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003ePressure Adjustment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eFactory set, adjustable range available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eRetard Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003ePneumatic retard mechanism\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eElectrical Contacts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eTwo SPDT (Form C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eContact Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003e15A @ 125\/250 VAC, 2A @ 30 VDC (resistive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eEnclosure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eNEMA 4 \/ IP54 weather-resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eDie-cast aluminum base, composite cover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eEnvironmental Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003e40°F to 120°F (4.5°C to 49°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eConduit Entrances\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eTwo knockouts for ½” conduit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eStandards Compliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eNFPA 13, NFPA 13D, NFPA 13R, NFPA 72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eVertical or horizontal, threaded connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003e1.5 lbs (0.68 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.443%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduction Status\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 66.3377%; height: 19.5938px;\"\u003eDiscontinued (replaced by Potter VSR-5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About WFSR-F\u003c\/h4\u003e\n\u003cp\u003eThe WFSR-F is part of Potter’s WFSR Series of pressure-type waterflow switches, built to monitor wet sprinkler piping in compliance with NFPA standards. This model is factory-set to activate between 5 and 8 PSI (0.35–0.55 BAR) on rising pressure and features a pneumatic retard mechanism to prevent false alarms due to pressure fluctuations. Housed in a NEMA 4\/IP54 weather-resistant enclosure, it is suitable for both indoor and outdoor installations. The unit includes dual SPDT contacts rated for up to 15 amps at 250 VAC and is compatible with automatic sprinkler, NFPA-13D, and NFPA-13R residential systems. The WFSR-F has been discontinued by the manufacturer and superseded by the VSR-5 model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePressure-Activated Detection: Triggers alarm upon rising system pressure (5–8 PSI).\u003c\/li\u003e\n\u003cli\u003ePneumatic Retard: Reduces false alarms caused by transient pressure surges.\u003c\/li\u003e\n\u003cli\u003eDual SPDT Contacts: Two Form C contacts rated 15A at 125\/250 VAC, 2A at 30VDC.\u003c\/li\u003e\n\u003cli\u003eWeather-Resistant Housing: NEMA 4\/IP54-rated enclosure for indoor\/outdoor use.\u003c\/li\u003e\n\u003cli\u003eDurable Construction: Die-cast aluminum base with UV\/flame-resistant composite cover.\u003c\/li\u003e\n\u003cli\u003eNFPA-Compliant: Meets NFPA 13, 13D, 13R, and 72 requirements for sprinkler monitoring.\u003c\/li\u003e\n\u003cli\u003ePressure Connection: ½” Male NPT fitting for straightforward installation.\u003c\/li\u003e\n\u003cli\u003eFactory Adjusted: Calibrated for reliable performance under 175 PSI system pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe WFSR-F delivers the reliability and precision required for sprinkler system waterflow detection, though it has been discontinued and replaced by the Potter VSR-5.\u003c\/p\u003e","brand":"Potter","offers":[{"title":"Default Title","offer_id":49105156276480,"sku":"WFSR-F","price":1544.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/4194c5cb8a724892bbb00eebdf6d9c38.jpg?v=1785541517","url":"https:\/\/alotechparts.com\/products\/wfsr-f-potter-pressure-activated-waterflow-alarm-switch-with-pneumatic-retard","provider":"Alo Tech Solutions","version":"1.0","type":"link"}