{"product_id":"notifier-cpx-551-smoke-detector-trusted-supplier","title":"CPX-551 | Notifier Intelligent Ionization Smoke Detector","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp\u003eThe Notifier APS‑6R is a 150-watt switching auxiliary power supply, designed to deliver reliable, filtered 24 VDC power for fire alarm systems.\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: 99.964%; height: 108px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 29.2337%; height: 19.6px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%; height: 19.6px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 29.2337%; height: 19.6px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%; height: 19.6px;\"\u003eNotifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 29.2337%; height: 19.6px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%; height: 19.6px;\"\u003e\u003cspan\u003eFire Safety\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 29.2337%; height: 19.6px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%; height: 19.6px;\"\u003eCPX-551\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 29.2337%; height: 19.6px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%; height: 19.6px;\"\u003e\u003cspan\u003eSmoke Detector\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eDevice Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003eSmoke Detector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eDetection Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003eIntelligent Ionization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eOperation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003eAddressable, Plug-In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eSensitivity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003eMOD 400(R): 0.40 – 0.99 Volts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eNominal Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003e1.06 ± 0.26% ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eMaximum Operating Temp.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003e120°F (48.9°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003eFor use only with duct housings DHX‑501 \/ DHX‑502\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003eCertifications\/IDs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003eBSA578-81-SA, N04-503-04, 7081 BC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 29.2337%;\"\u003e\u003cstrong\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 70.6331%;\"\u003e\u003cspan\u003e0.45 lbs\u003c\/span\u003e\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 CPX-551\u003c\/h4\u003e\n\u003cp\u003eThe CPX‑551 is part of Notifier’s legacy line of intelligent ionization smoke detectors, designed for rapid detection of fast-flaming fires in commercial fire alarm systems. Engineered for compatibility with Notifier’s addressable control panels, the CPX‑551 communicates real-time analog data for precise monitoring and maintenance alerts. Its low-profile, plug-in design simplifies installation while maintaining secure chamber integrity. Paired exclusively with duct housings DHX‑501 or DHX‑502, the detector was widely used in air handling systems before being discontinued in 2015 due to the industry-wide phase-out of ionization technology.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIonization Sensing Technology: Detects small combustion particles from fast-flaming fires using a single-source ionization chamber.\u003c\/li\u003e\n\u003cli\u003eIntelligent Addressable Operation: Communicates analog smoke levels to the control panel, enabling maintenance alerts and precise event logging.\u003c\/li\u003e\n\u003cli\u003ePlug-In Mounting: Installs easily on compatible bases with twist-lock engagement, reducing installation time and wiring complexity.\u003c\/li\u003e\n\u003cli\u003eLow-Profile Design: Compact form with a height of ~1.66\" supports aesthetic and space-sensitive ceiling applications.\u003c\/li\u003e\n\u003cli\u003eMagnetic Test Capability: Built-in magnetic switch allows testing without removal from base.\u003c\/li\u003e\n\u003cli\u003eDedicated Duct Housing Compatibility: Designed specifically for use with Notifier DHX‑501 and DHX‑502 duct detector housings.\u003c\/li\u003e\n\u003cli\u003eThermal Ratings: Operates in environments up to 120°F (48.9°C), suited for HVAC systems and equipment rooms.\u003c\/li\u003e\n\u003cli\u003eLegacy Compliance: Provided nominal sensitivity of 1.06 ± 0.26%\/ft with MOD 400(R) voltage range of 0.40–0.99 V.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Notifier CPX‑551 offered fast, addressable ionization-based smoke detection in a compact, intelligent platform. Although discontinued in July 2015, it remains in use in legacy duct applications where rapid detection of flaming fires was critical. For modern replacements, Notifier recommends transitioning to photoelectric or multi-criteria sensor technologies.\u003c\/p\u003e","brand":"Notifier","offers":[{"title":"Default Title","offer_id":50469104714026,"sku":"CPX-551","price":524.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/2_188b1de2-c66f-4bd6-a380-43a8fde7ecba.jpg?v=1772013828","url":"https:\/\/iqelectro.com\/products\/notifier-cpx-551-smoke-detector-trusted-supplier","provider":"IQElectro","version":"1.0","type":"link"}