{"title":"Commercial Smoke Detectors, Addressable and Conventional","description":"\u003ch2 data-end=\"771\" data-start=\"411\"\u003eBrowse a wide selection of commercial smoke detectors designed for reliable early fire detection in industrial and commercial applications\u003c\/h2\u003e\n\u003cp data-end=\"771\" data-start=\"411\"\u003eThe Fire Alarm Supplier offers addressable smoke detectors, conventional smoke detectors, duct detectors, and multi sensor detectors from leading brands including Notifier, System Sensor, Siemens, Edwards, and Fire Lite.\u003c\/p\u003e\n\u003cp data-end=\"1001\" data-start=\"773\"\u003eOur inventory supports fire protection contractors, system integrators, and facility managers looking for reliable smoke detection solutions. Shop smoke detectors with fast shipping, competitive pricing, and trusted performance.\u003c\/p\u003e\n\u003cp data-end=\"1154\" data-start=\"1003\"\u003eWe stock addressable smoke detectors, conventional smoke detectors, duct smoke detectors, and replacement smoke detector heads ready for fast shipping.\u003c\/p\u003e","products":[{"product_id":"system-sensor-2151-smoke-detector-replaces-2451th","title":"System Sensor 2151 Smoke Detector (Replaces 2451TH)","description":"\u003ch2\u003eSystem Sensor 2151 Photoelectric Low-Profile Plug-In Smoke Detector (Replaces 2451TH)\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2151 is a low-profile photoelectric plug-in smoke detector engineered to provide dependable open-area smoke detection for conventional fire alarm systems. Replacing the 2451TH, the 2151 features an advanced optical sensing chamber that delivers fast, accurate detection of visible smoke particles while helping reduce nuisance alarms caused by dust and environmental contaminants.\u003c\/p\u003e\n\u003cp\u003eDesigned for both new installations and replacement projects, the 2151 offers plug-in construction that allows quick installation and maintenance. It is compatible with a wide range of System Sensor mounting bases, providing flexibility for various wiring configurations and applications. Dual LEDs provide 360-degree visibility, flashing during normal operation and latching on in alarm to simplify maintenance and troubleshooting.\u003c\/p\u003e\n\u003cp\u003eIts low-profile design blends seamlessly into commercial and institutional environments while providing reliable smoke detection for offices, schools, healthcare facilities, hotels, and other protected spaces.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLow-profile photoelectric smoke detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplaces the System Sensor 2451TH\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdvanced optical sensing chamber\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlug-in design for quick installation and maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDual LEDs provide 360-degree visibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLED flashes during standby and latches during alarm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStable performance in high air velocity environments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with multiple System Sensor detector bases\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTamper-resistant base capability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote LED compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemovable cover for easy cleaning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eUL listed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine System Sensor smoke detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2151 is ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOffice buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSchools and universities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHospitals and healthcare facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHotels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetail buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWarehouses\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGovernment buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommercial facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConventional fire alarm systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOpen-area smoke detection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturer: System Sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eModel: 2151\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Type: Photoelectric Smoke Detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDetection Method: Photoelectric\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstallation: Indoor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting: Plug-in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOperating Voltage: 8.5 to 35 VDC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStandby Current: 120 µA\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOperating Temperature: 32°F to 120°F (0°C to 49°C)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOperating Humidity: 10% to 93% RH, non-condensing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAlarm Indication: Dual red LEDs with 360-degree visibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConstruction: Low-profile housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatibility: System Sensor conventional detector bases\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplacement For: 2451TH\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompliance: UL 268\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose the System Sensor 2151?\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2151 delivers dependable photoelectric smoke detection in a compact, low-profile design that is easy to install and maintain. With its advanced optical sensing chamber, plug-in construction, dual LED indication, and compatibility with multiple System Sensor bases, it provides a reliable and cost-effective solution for protecting commercial and institutional buildings.\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756394208,"sku":"2151","price":62.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2151-smoke-detector-replaces-2451th-31897151439072.jpg?v=1769661637"},{"product_id":"system-sensor-2151t-plug-in-photoelectric-smoke-detector","title":"System Sensor 2151T Plug-In Photoelectric Smoke Detector","description":"\u003ch2\u003eSystem Sensor 2151T Low-Profile Plug-In Photoelectric Smoke Detector with a Fixed-Temperature Heat Sensor\u003c\/h2\u003e\n\u003cp\u003eIt is part of the 100 Series of Plug-In Smoke Detectors from System Sensor. It is also compatible with 400 Series products from System Sensor. \u003cbr\u003e\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756426976,"sku":"2151T","price":72.05,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2151t-plug-in-photoelectric-smoke-detector-31897157107936.jpg?v=1763278625"},{"product_id":"system-sensor-2wta-b-smoke-detector-2-wire","title":"System Sensor 2WTA-B Smoke Detector 2-Wire","description":"\u003ch2\u003eSystem Sensor 2WTA-B Photoelectric i3 Series Smoke Detector, 2-Wire with Thermal Sensor and Built-In Sounder, White\u003cbr\u003e\n\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756459744,"sku":"2WTA-B","price":64.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2wta-b-smoke-detector-2-wire-31897160351968.jpg?v=1763278627"},{"product_id":"system-sensor-4w-b-smoke-detector-4-wire","title":"System Sensor 4W-B Smoke Detector 4-Wire","description":"\u003ch2\u003eSystem Sensor 4W-B Photoelectric i3 Series Smoke Detector, 4-Wire, White\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756525280,"sku":"4W-B","price":57.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-4w-b-smoke-detector-4-wire-31897161236704.jpg?v=1763278632"},{"product_id":"system-sensor-4wt-b-photoelectric-smoke-detector-4-wire","title":"System Sensor 4WT-B Photoelectric Smoke Detector 4-Wire","description":"\u003ch2\u003eSystem Sensor 4WT-B Photoelectric i3 Series Smoke Detector, 4-Wire, 135°F Fixed Thermal Sensor, White\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSystem Sensor 4WT-B Photoelectric i3 Series Smoke Detector\u003c\/strong\u003e is a reliable and intelligent fire detection solution designed for commercial and residential applications. Featuring advanced photoelectric sensing technology combined with a \u003cstrong\u003e135°F fixed temperature thermal sensor\u003c\/strong\u003e, the 4WT-B provides enhanced protection by detecting both smoke and heat conditions.\u003c\/p\u003e\n\u003cp\u003ePart of the \u003cstrong\u003eSystem Sensor i3 Series\u003c\/strong\u003e, the 4WT-B offers intelligent features such as drift compensation, maintenance alerts, and simplified installation, making it an ideal choice for new installations and system upgrades.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e• Photoelectric smoke detection with 135°F fixed thermal sensor\u003cbr\u003e• 4-wire detector for conventional fire alarm systems\u003cbr\u003e• Built-in drift compensation reduces nuisance alarms\u003cbr\u003e• Maintenance signaling for simplified servicing\u003cbr\u003e• Plug-in detector with included mounting base\u003cbr\u003e• Wide-angle dual-color LED status indicators\u003cbr\u003e• Built-in test switch for easy testing\u003cbr\u003e• Stop-Drop N Lock™ installation design\u003cbr\u003e• Freeze trouble detection\u003cbr\u003e• Compatible with most conventional control panels\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eAdvanced Detection Technology\u003c\/h3\u003e\n\u003cp\u003eThe System Sensor 4WT-B combines \u003cstrong\u003ephotoelectric smoke detection\u003c\/strong\u003e with \u003cstrong\u003efixed temperature heat detection at 135°F (57°C)\u003c\/strong\u003e. This dual sensing capability improves fire detection performance and helps reduce false alarms.\u003c\/p\u003e\n\u003cp\u003eThe detector also features \u003cstrong\u003eautomatic drift compensation\u003c\/strong\u003e, which adjusts sensitivity over time as dust accumulates, ensuring reliable long term operation and reduced maintenance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEasy Installation\u003c\/h3\u003e\n\u003cp\u003eThe i3 Series plug-in design allows installers to pre-wire the mounting base before installing the detector head. The \u003cstrong\u003eStop-Drop N Lock™\u003c\/strong\u003e feature makes installation quick and secure.\u003c\/p\u003e\n\u003cp\u003eFlexible mounting options include:\u003c\/p\u003e\n\u003cp\u003e• Single gang back boxes\u003cbr\u003e• Octagonal back boxes\u003cbr\u003e• 4 square back boxes\u003cbr\u003e• Direct ceiling mounting\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eLED Status Indicators\u003c\/h3\u003e\n\u003cp\u003eWide-angle LED indicators provide instant detector status:\u003c\/p\u003e\n\u003cp\u003e• Green LED indicates normal operation\u003cbr\u003e• Red LED indicates alarm condition\u003cbr\u003e• Additional indications for maintenance and trouble\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e• Model: 4WT-B\u003cbr\u003e• Type: 4-wire photoelectric smoke detector\u003cbr\u003e• Heat Sensor: 135°F fixed temperature\u003cbr\u003e• Color: White\u003cbr\u003e• Technology: Photoelectric and thermal\u003cbr\u003e• Wiring: 4-wire system\u003cbr\u003e• Series: i3 Series\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eIdeal for:\u003c\/p\u003e\n\u003cp\u003e• Commercial buildings\u003cbr\u003e• Offices\u003cbr\u003e• Retail stores\u003cbr\u003e• Schools\u003cbr\u003e• Healthcare facilities\u003cbr\u003e• Residential applications\u003cbr\u003e• Industrial environments\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Choose the System Sensor 4WT-B?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eSystem Sensor 4WT-B\u003c\/strong\u003e offers dependable smoke and heat detection, easy installation, and reduced maintenance. With intelligent i3 Series features and dual sensing technology, it delivers reliable fire protection for a wide range of applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e System Sensor\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e 4WT-B\u003cbr\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e i3 Series\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e 4-Wire Photoelectric Smoke Detector with Fixed Heat Sensor\u003cbr\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756558048,"sku":"4WT-B","price":59.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-4wt-b-photoelectric-smoke-detector-4-wire-31897156878560.jpg?v=1763278616"},{"product_id":"system-sensor-4wta-b-smoke-detector-4-wire","title":"System Sensor 4WTA-B Smoke Detector 4-Wire","description":"\u003ch2\u003eSystem Sensor 4WTA-B Photoelectric i3 Series Smoke Detector, 4-Wire, with Thermal Sensor and Built-In Sounder, White\u003cbr\u003e\n\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756590816,"sku":"4WTA-B","price":72.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-4wta-b-smoke-detector-4-wire-31897160024288.jpg?v=1763278644"},{"product_id":"system-sensor-4wtr-b-smoke-detector-and-thermal-sensor-4-wire","title":"System Sensor 4WTR-B Smoke Detector and Thermal Sensor 4-Wire","description":"\u003ch2\u003eSystem Sensor 4WTR-B i3 4-Wire Photoelectric Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 4WTR-B i3 Series Smoke Detector combines photoelectric smoke detection, a fixed-temperature thermal sensor, and a Form C relay in a single device for dependable fire detection in commercial, residential, and light industrial applications. As part of the System Sensor i3 Series, it incorporates intelligent features that simplify installation, maintenance, and ongoing system monitoring.\u003c\/p\u003e\n\u003cp\u003eDesigned for use with conventional 4-wire fire alarm systems, the 4WTR-B features automatic drift compensation, remote maintenance signaling, dual-color LED status indication, and a plug-in design with an included mounting base. Its integrated \u003cstrong\u003e135°F (57.2°C) fixed-temperature thermal sensor\u003c\/strong\u003e and \u003cstrong\u003eForm C relay\u003c\/strong\u003e provide enhanced system functionality while reducing installation time and maintenance costs.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e4-wire photoelectric smoke detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePart of the System Sensor i3 Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntegrated 135°F (57.2°C) fixed-temperature thermal sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in Form C relay\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAutomatic drift compensation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote maintenance signaling\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWide-angle dual-color LED status indication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlug-in detector with mounting base included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStop-Drop N Lock™ installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLarge wire entry port\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIn-line terminals with SEMS screws\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in test switch\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEZ Walk loop testing capability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemovable sensing chamber for simplified maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with conventional 4-wire fire alarm systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine System Sensor smoke detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 4WTR-B is ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCommercial buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOffice buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSchools and universities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHealthcare facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHotels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApartment buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetail stores\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLight industrial facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConventional 4-wire fire alarm systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturer: System Sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eModel: 4WTR-B\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Series: i3 Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Type: 4-Wire Photoelectric Smoke Detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDetection Technology: Photoelectric\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThermal Sensor: 135°F (57.2°C) fixed-temperature\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRelay Type: Form C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWiring: 4-wire\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting Base: Included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLED Indicator: Wide-angle dual-color LED\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDrift Compensation: Automatic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote Maintenance Signaling: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in Test Switch: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEZ Walk Testing: Supported\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting Options: Direct ceiling mount, octagonal back box, single-gang back box, or 4-inch square back box with plaster ring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApplication: Conventional fire alarm systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose the System Sensor 4WTR-B?\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 4WTR-B combines intelligent smoke detection, fixed-temperature heat detection, and relay functionality in a single device. With automatic drift compensation, simplified maintenance, easy plug-in installation, and compatibility with a wide range of conventional fire alarm systems, it is an excellent solution for reliable fire protection in commercial, residential, and light industrial applications.\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132756623584,"sku":"4WTR-B","price":74.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-4wtr-b-smoke-detector-and-thermal-sensor-4-wire-31897157501152.jpg?v=1763278648"},{"product_id":"hfp-11-siemens","title":"Siemens HFP-11 (500-033290) Intelligent Fire Detector","description":"\u003ch2\u003eSiemens HFP-11 (500-033290) Intelligent Fire Detector is an advanced and reliable detection system designed for use with FireFinder XLS and FS-250 control panels\u003c\/h2\u003e\n\u003cp\u003eThis detector is engineered with the most sophisticated \"detector intelligence\" available today, allowing it to distinguish non-threatening phenomena from actual fire hazards, while optimizing detection for the area in which it is installed.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43132761637088,"sku":"HFP-11","price":378.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/siemens-smoke-detectors-default-title-siemens-hfp-11-500-033290-intelligent-fire-detector-31896958075104.jpg?v=1763278795"},{"product_id":"siemens-oh121-554372-f2-a1-thermal-smoke-detector","title":"Siemens OH121 (554372-F2-A1) Thermal Smoke Detector","description":"\u003ch2\u003eSiemens OH121 (554372-F2-A1) Thermal Smoke Detector\u003c\/h2\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43132762947808,"sku":"OH121","price":100.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/siemens-smoke-detectors-default-title-siemens-oh121-554372-f2-a1-thermal-smoke-detector-33858985689312.jpg?v=1763278824"},{"product_id":"siemens-op921-s54320-f4-a2-smoke-detector","title":"Siemens OP921 (S54320-F4-A2) Smoke Detector","description":"\u003ch2\u003eSiemens OP921 (S54320-F4-A2) Photoelectric Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eModel OP921 incorporates an optical sensor using a light-scattering detection principle. The device utilizes advanced software algorithms to analyze the signals providing highly stable and accurate smoke detection.\u003c\/p\u003e\n\u003cp\u003eModel OP921 is UL 268 7th edition listed incorporating advanced built-in ISOtechnologyTM - True Class-X SLC operation (use is optional), greatly improving system reliability and circuit integrity while providing advanced addressable fault finding.\u003c\/p\u003e\n\u003cp\u003eEach detector fits into one (1) wall-or-ceiling footprint and only occupies one (1) address on the signal-line circuit (SLC). Model OP921 is a plug-in, two-wire, addressable photoelectric smoke detector whose value is increased with a built-in technology feature.\u003c\/p\u003e\n\u003cp\u003eModel OP921 is Underwriters’ Laboratories Listed [UL268A Listed for direct in-air duct usage]. Each detector utilizes a dust-resistant photoelectric smoke chamber and\u003cbr\u003emicroprocessor-based electronics with a low-profile plastic housing. Every Model\u003cbr\u003eOP921 fire detector is shipped with a protective dust cover.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43132763177184,"sku":"OP921","price":52.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/siemens-smoke-detectors-default-title-siemens-op921-s54320-f4-a2-smoke-detector-31998413832416.jpg?v=1763278827"},{"product_id":"simplex-4098-9605-1","title":"Simplex 4098-9605 TrueAlarm Photoelectric Detector UL Listed","description":"\u003ch2\u003eSimplex 4098-9605 TrueAlarm Photoelectric Detector. UL Listed.\u003c\/h2\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43132776579296,"sku":"4098-9605","price":47.1,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/simplex-smoke-detectors-default-title-simplex-4098-9605-31950632288480.jpg?v=1765747620"},{"product_id":"simplex-4098-9714-truealarm-addressable-photoelectric-smoke-detector","title":"Simplex 4098-9714 Photoelectric Smoke Sensor White","description":"\u003ch2\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cb id=\"docs-internal-guid-51474241-7fff-587a-b69a-462a7bc5319a\"\u003e\u003cspan\u003eSimplex 4098-9714 Photoelectric Smoke and Heat Sensor – White, NEMA 1 Rated\u003c\/span\u003e\u003c\/b\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cb id=\"docs-internal-guid-d3056fae-7fff-604b-d522-d51408c630b0\"\u003e\u003cspan\u003eThe Simplex 4098-9714 TrueAlarm photoelectric smoke \u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003edetector is an advanced addressable smoke detector engineered for dependable performance in commercial and industrial environments. This intelligent fire alarm smoke detector combines photoelectric smoke sensing with heat detection to deliver accurate, early warning protection in mission-critical facilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDesigned as a high-performance commercial smoke detector and industrial smoke detector, this unit uses a stable, pulsed LED light source and precision silicon photodiode receiver. This technology allows the photoelectric fire detector to accurately detects smoke particles produced by smoldering fires, which often generate more smoke than flame in early stages.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis intelligent detector features three user-selectable sensitivity settings (0.2%, 0.5%, and 1% per foot) for special applications, along with a standard sensitivity range of 1.25% to 3.1% per foot. The connected fire alarm control unit applies an adaptive algorithm that continuously monitors environmental conditions to maintain proper sensitivity and minimize \u003cmeta charset=\"utf-8\"\u003enuisance alarms caused by dust or environmental changes.\u003cbr\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003eWith a NEMA 1 rated enclosure, sleek white design, and durable construction, \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003ethis fire safety smoke detector is ideal for office buildings, healthcare facilities, schools, warehouses, and manufacturing plants. As part of a complete fire alarm system, it works seamlessly with compatible panels and backup battery systems to ensure continuous protection—even during power outages.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eWhat type of smoke detection does the Simplex 4098-9714 use?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIt uses photoelectric smoke sensing (via a pulsed LED light source and silicon photodiode receiver) combined with heat detection to identify both smoldering and flaming fires early.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIs the 4098-9714 an addressable smoke detector?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It is a fully addressable intelligent detector that integrates directly with Simplex TrueAlarm panels for continuous environmental monitoring and automatic sensitivity adjustments.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhere can this detector be used?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eWith a NEMA 1 rated enclosure, it is suitable for commercial and industrial facilities, including office buildings, healthcare centers, schools, warehouses, and manufacturing plants.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43132777431264,"sku":"4098-9714","price":27.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/photoelectric_smoke_detector_Simplex_4098-9714..jpg?v=1781857529"},{"product_id":"simplex-4098-9754-multi-sensor-photoelectric-and-heat-sensing","title":"Simplex 4098-9754 Multi-Sensor Photoelectric and Heat Sensing","description":"\u003ch2\u003eThe Simplex 4098-9754 TrueAlarm multi-sensor combines the established performances of a photoelectric smoke sensor with a fast-acting and accurate TrueAlarm thermal sensor to provide both features in a single sensor\/base assembly\u003cbr\u003eDesigned for high-reliability applications, this unit offers the same precision found in the Simplex 4098 9714 series.\u003c\/h2\u003e\n\u003ch2\u003eBy integrating a specialized \u003cstrong\u003e\u003ca href=\"https:\/\/thefirealarmsupplier.com\/products\/simplex-4098-9714-photoelectric-smoke-sensor-white\"\u003eheat detector sensor\u003c\/a\u003e\u003c\/strong\u003e with advanced smoke sensing technology, it provides comprehensive protection in a single sensor\/base assembly.\u003c\/h2\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43132777824480,"sku":"4098-9754","price":46.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/simplex-smoke-detectors-default-title-simplex-4098-9754-multi-sensor-photoelectric-and-heat-sensing-31897050284256.jpg?v=1763279075"},{"product_id":"simplex-4098-9757-photoelectric-smoke-detector-2-wire","title":"Simplex 4098-9757 Photoelectric Smoke Detector 2-Wire","description":"\u003ch2\u003eThe Simplex 4098-9757 is a photoelectric analog sensing and IDNet two-wire addressable communications smoke detector\u003c\/h2\u003e\n\u003cp\u003eThe Simplex 4098-9757 is a high-performance\u003ca href=\"https:\/\/thefirealarmsupplier.com\/products\/simplex-4098-9714-photoelectric-smoke-sensor-white\"\u003e photoelectric sensor smoke detector\u003c\/a\u003e featuring IDNet two-wire addressable communications. While this model focuses on smoke, it is often used alongside the Simplex 4098 9714 to provide comprehensive protection in fire alarm systems.\u003c\/p\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43132777922784,"sku":"4098-9757","price":49.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/simplex-smoke-detectors-default-title-simplex-4098-9757-photoelectric-smoke-detector-2-wire-32672262127840.jpg?v=1763279078"},{"product_id":"system-sensor-2w-b-2-wire-photoelectric-smoke-detector","title":"System Sensor 2W-B Photoelectric Smoke Detector 2-Wire","description":"\u003ch2\u003eSystem Sensor 2W-B Two-Wire Photoelectric Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2W-B Two-Wire Photoelectric Smoke Detector is designed for reliable smoke detection and simple installation in residential, commercial, and light industrial applications. As part of the advanced System Sensor i3 Series, the 2W-B features intelligent technologies such as drift compensation, remote maintenance signaling, and a plug-in design that simplifies installation and servicing.\u003c\/p\u003e\n\u003cp\u003eCompatible with most conventional two-wire fire alarm control panels, the 2W-B is an excellent choice for new installations, system upgrades, and replacement projects requiring dependable photoelectric smoke detection.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTwo-wire photoelectric smoke detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePart of the System Sensor i3 Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with most conventional alarm control panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlug-in detector with mounting base included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAutomatic drift compensation for long-term reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote maintenance signaling capability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWide-angle dual-color LED status indicator\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStop-Drop N Lock™ installation design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLarge wire entry port for easier wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIn-line terminals with SEMS screws\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in test switch\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEZ Walk loop testing capability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCeiling or back box mounting options\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine System Sensor smoke detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIntelligent Detection and Maintenance\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2W-B continuously monitors its sensing chamber using automatic drift compensation, helping maintain proper sensitivity as dust and environmental conditions change. This reduces nuisance alarms while extending maintenance intervals.\u003c\/p\u003e\n\u003cp\u003eWhen connected to compatible modules or fire alarm control panels, the detector can provide remote maintenance alerts, allowing maintenance personnel to quickly identify detectors requiring service.\u003c\/p\u003e\n\u003cp\u003eFor even faster inspections, the optional SENS-RDR wireless sensitivity reader measures detector sensitivity in percent-per-foot obscuration without removing the detector from service.\u003c\/p\u003e\n\u003ch2\u003eEasy Installation\u003c\/h2\u003e\n\u003cp\u003eThe i3 Series plug-in design allows mounting bases to be installed and wired before detector heads are fitted, reducing installation time and simplifying future maintenance.\u003c\/p\u003e\n\u003cp\u003eThe patented Stop-Drop N Lock™ feature provides secure, one-step detector installation while minimizing handling during commissioning.\u003c\/p\u003e\n\u003cp\u003eCompatible mounting options include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDirect ceiling mounting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOctagonal back boxes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSingle-gang back boxes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4-inch square back boxes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eLED Status Indicators\u003c\/h2\u003e\n\u003cp\u003eThe dual-color, wide-angle LED provides clear visual indication of detector status.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eGreen LED: Normal standby operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRed LED: Alarm condition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdditional LED indications: Maintenance required or trouble condition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAdvanced Testing Features\u003c\/h2\u003e\n\u003cp\u003eWhen used with the System Sensor 2W-MOD2 maintenance module or compatible fire alarm control panels, the EZ Walk loop test feature allows technicians to verify detector operation and wiring efficiently using the LED indicators on each detector.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2W-B is ideal for smoke detection in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCommercial buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOffice buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSchools and universities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetail stores\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHealthcare facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApartment buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResidential properties\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLight industrial facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturer: System Sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eModel: 2W-B\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Series: i3 Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Type: Two-Wire Photoelectric Smoke Detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDetection Technology: Photoelectric\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWiring: Two-wire\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstallation: Plug-in detector with mounting base included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting Options: Ceiling, octagonal back box, single-gang back box, or 4-inch square back box\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLED Indicator: Dual-color wide-angle LED\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDrift Compensation: Automatic\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRemote Maintenance Signaling: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBuilt-in Test Switch: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEZ Walk Testing: Supported\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatibility: Most conventional two-wire fire alarm control panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose the System Sensor 2W-B?\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2W-B combines intelligent smoke detection with simple installation and reduced maintenance. Its automatic drift compensation, remote maintenance capabilities, plug-in design, and broad compatibility with conventional fire alarm systems make it a dependable and cost-effective solution for protecting residential, commercial, and light industrial properties.\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132793815264,"sku":"2W-B","price":49.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2w-b-photoelectric-smoke-detector-2-wire-31897158779104.jpg?v=1763279375"},{"product_id":"system-sensor-2wt-b-i3-2-wire-smoke-heat-detector","title":"System Sensor 2WT-B i3 2-Wire Smoke and Heat Detector","description":"\u003ch2\u003eSystem Sensor 2WT-B Photoelectric i3 Series Smoke and Heat Detector, 2-Wire, 135°F Fixed Thermal Sensor, White (Replaces 2100T)\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2WT-B is a 2-wire photoelectric smoke and heat detector from the innovative i3 Series, designed to provide reliable fire detection while simplifying installation, testing, and long-term maintenance. Replacing the 2100T, this detector combines advanced photoelectric smoke sensing with a \u003cstrong\u003e135°F (57°C) fixed-temperature thermal sensor\u003c\/strong\u003e to deliver dependable protection for a wide range of commercial and residential applications.\u003c\/p\u003e\n\u003cp\u003eIts advanced optical sensing chamber provides fast detection of visible smoke while reducing nuisance alarms caused by dust and airborne contaminants. The integrated fixed-temperature heat sensor offers an additional layer of fire protection, making the 2WT-B suitable for areas where both smoke and heat detection are desirable.\u003c\/p\u003e\n\u003cp\u003eDesigned for installer convenience, the 2WT-B features a plug-in design with a large wire entry port that allows clean, efficient wiring. The detector is compatible with multiple mounting methods and includes wide-angle red and green LEDs that provide clear visual indication of detector status, including normal operation, alarm, maintenance, out-of-sensitivity, and freeze trouble conditions.\u003c\/p\u003e\n\u003cp\u003eAs part of the System Sensor i3 Series, the 2WT-B incorporates intelligent drift compensation and smoothing algorithms that continuously adjust detector sensitivity to help reduce nuisance alarms and extend maintenance intervals. When used with the optional 2W-MOD2 maintenance module or compatible fire alarm control panels supporting the i3 protocol, additional features such as EZ Walk Loop Test and remote maintenance indication further simplify system testing and servicing.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2-wire photoelectric smoke and heat detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplaces the System Sensor 2100T\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e135°F (57°C) fixed-temperature thermal sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAdvanced photoelectric smoke sensing technology\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntelligent drift compensation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSmoothing algorithms reduce nuisance alarms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlug-in design for fast installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLarge wire entry port for neat wiring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWide-angle red and green LED status indicators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOut-of-sensitivity and maintenance indication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFreeze trouble indication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with the optional 2W-MOD2 maintenance module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEZ Walk Loop Test capability with compatible systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with i3 protocol fire alarm panels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGenuine System Sensor i3 Series detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2WT-B is ideal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOffice buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSchools and universities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHotels\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHospitals and healthcare facilities\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApartment buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRetail stores\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWarehouses\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResidential buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCommercial buildings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConventional fire alarm systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eManufacturer: System Sensor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eModel: 2WT-B\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Series: i3 Series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProduct Type: Photoelectric Smoke and Heat Detector\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWiring: 2-wire\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDetection Method: Photoelectric Smoke and Fixed Temperature Heat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFixed Temperature Rating: 135°F (57°C)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHousing Color: White\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstallation: Indoor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting: Plug-in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLED Indicators: Red and Green, wide-angle visibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMaintenance Features: Drift compensation and automatic sensitivity monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptional Accessories: 2W-MOD2 Maintenance Module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSpecial Features: EZ Walk Loop Test, remote maintenance indication, freeze trouble monitoring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReplacement For: 2100T\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompliance: UL 268 and UL 521\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose the System Sensor 2WT-B?\u003c\/h2\u003e\n\u003cp\u003eThe System Sensor 2WT-B combines dependable photoelectric smoke detection with a \u003cstrong\u003e135°F fixed-temperature heat sensor\u003c\/strong\u003e in a single, intelligent detector. Its i3 Series technology minimizes nuisance alarms through automatic drift compensation while simplifying maintenance with built-in diagnostics and compatibility with EZ Walk Loop Test. Easy installation, reliable performance, and advanced maintenance features make the 2WT-B an excellent choice for protecting commercial and residential properties.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132793848032,"sku":"2WT-B","price":53.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2wt-b-smoke-and-heat-detector-2-wire-31897158156512.jpg?v=1763279410"},{"product_id":"fire-lite-sd365-addressable-smoke-detector","title":"Fire-Lite SD365 Addressable Photoelectric Smoke Detector","description":"\u003ch2\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cb id=\"docs-internal-guid-4a89a01b-7fff-d547-472e-0f1f02d2352c\"\u003e\u003cspan\u003eFire-Lite SD365 Addressable Smoke Detector\u003c\/span\u003e\u003c\/b\u003e\n\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFire-Lite SD365 Addressable Photoelectric Smoke Detector LiteSpeed Only White Replaced by SS-PHOTO\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Fire-Lite SD365 is a high-performance addressable photoelectric smoke detector designed for modern fire alarm systems that require precision, reliability, and fast response times. As a trusted fire lite smoke detector, the SD365 is built to integrate seamlessly with compatible control panels.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Fire-Lite SD365 Addressable Photoelectric Smoke Detector is a reliable intelligent detector designed for use with LiteSpeed compatible Fire-Lite fire alarm control panels. Engineered for dependable performance, the Fire Lite SD365 delivers accurate smoke detection for commercial and industrial fire alarm applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eUsing advanced photoelectric sensing technology, the Fire-Lite SD365 detects smoke particles produced by smoldering fires, providing early warning and helping reduce nuisance alarms. This addressable photoelectric smoke detector is especially effective in environments where early detection of slow-burning fires is critical. The intelligent addressable design allows the fire alarm control panel to continuously monitor detector status and sensitivity for improved system reliability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAs a Fire Lite Addressable Smoke Detector, the SD365 supports advanced communication through LiteSpeed protocol, ensuring faster response times and more accurate system reporting. This makes it a preferred addressable smoke detector for facilities that prioritize safety and efficiency.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eDesigned for easy installation and maintenance, the SD365 features a plug-in design and streamlined white housing suitable for modern commercial environments. The addressable capability allows each detector to be uniquely identified, enabling faster troubleshooting and targeted maintenance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Fire-Lite SD365 is LiteSpeed-only, ensuring fast communication and reliable performance when used with compatible Fire-Lite systems. This model has been replaced by SS-PHOTO, making it suitable for replacement, maintenance, and system expansion projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFor upgrading an existing system or replacing older units, the SD365 remains a dependable photoelectric smoke detector option for maintaining compliance and performance in commercial fire alarm systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e• Addressable photoelectric smoke detector\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• LiteSpeed-compatible\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Intelligent addressable technology\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Early warning smoke detection\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Reduced nuisance alarms\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Plug-in design for easy installation\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• White low-profile housing\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Continuous sensitivity monitoring\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Ideal for commercial fire alarm systems\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Replaced by SS-PHOTO\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e• Commercial buildings\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Office buildings\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Schools and universities\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Healthcare facilities\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Retail environments\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Industrial facilities\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e• Fire alarm system upgrades and maintenance\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eProduct Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBrand: Fire-Lite\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eModel: SD365\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eType: Addressable Photoelectric Smoke Detector\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eProtocol: LiteSpeed-only\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eColor: White\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eInstallation: Plug-in\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eReplacement Model: SS-PHOTO\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Fire Lite SD365 Addressable Smoke Detector offers reliable performance, intelligent monitoring, and easy integration into existing fire alarm systems, making it a practical choice for both new installations and system upgrades.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Fire-Lite SD365 Addressable Photoelectric Smoke Detector delivers dependable smoke detection, easy installation, and reliable performance for LiteSpeed-compatible fire alarm systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eWhat is the Fire-Lite SD365 photoelectric smoke detector?\u003c\/b\u003e It is a high-performance, low-profile addressable photoelectric smoke detector designed to provide early warning detection of smoldering fires in commercial and industrial environments.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIs the Fire-Lite SD365 an addressable smoke detector?\u003c\/b\u003e Yes. It is an intelligent addressable detector that communicates directly with the control panel using the LiteSpeed protocol for continuous status monitoring and unique device identification.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHow does the Fire-Lite addressable smoke detector work?\u003c\/b\u003e It utilizes advanced photoelectric sensing technology to detect smoke particles from slow-burning fires, while its intelligent firmware allows the control panel to continuously monitor its sensitivity and environmental status to minimize false alarms.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhich fire alarm panels are compatible with the Fire-Lite SD365?\u003c\/b\u003e It is compatible specifically with Fire-Lite fire alarm control panels that support the LiteSpeed communication protocol. Note that this legacy model has been replaced by the SS-PHOTO.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhat is the difference between an addressable smoke detector and a conventional detector?\u003c\/b\u003e An addressable detector has a unique individual ID that allows the control panel to pinpoint its exact location and monitor its specific status, whereas a conventional detector only signals an alarm for an entire zone without identifying the specific device.\u003c\/p\u003e","brand":"Fire-Lite","offers":[{"title":"Default Title","offer_id":43132796960992,"sku":"SD365","price":86.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/fire-lite-smoke-detectors-default-title-fire-lite-sd365-addressable-smoke-detector-34894000980192.jpg?v=1763279414"},{"product_id":"silent-knight-sk-photo-w-addressable-smoke-detector","title":"Silent Knight SK-PHOTO-W Addressable Smoke Detector","description":"\u003ch2\u003eSK-PHOTO-W White Photoelectric Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eThe Silent Knight SK-PHOTO-W Intelligent Photoelectric Smoke Detector combines modern aesthetics with advanced detection technology for reliable fire protection. Designed for both performance and ease of installation, this intelligent plug in smoke detector is ideal for commercial fire alarm systems requiring accurate and dependable smoke detection.\u003c\/p\u003e\n\u003cp\u003eThe SK-PHOTO-W Series features an enhanced optical sensing chamber engineered to detect smoke from a wide range of combustion sources. This improved detection capability meets more stringent code requirements while helping reduce nuisance alarms.\u003c\/p\u003e\n\u003cp\u003eWith programmable sensitivity levels, the Silent Knight SK-PHOTO-W allows installers to adjust detection settings directly through the fire alarm control panel software. Sensitivity is continuously monitored and reported to the panel, ensuring optimal performance and maintenance visibility.\u003c\/p\u003e\n\u003cp\u003eThe Point ID capability allows each detector address to be set using rotary decimal switches, providing precise location identification. This feature supports targeted maintenance when chamber contamination reaches unacceptable levels, improving system reliability and reducing service time.\u003c\/p\u003e\n\u003cp\u003eThe Silent Knight SK-PHOTO-W has been replaced by SS-PHOTO, making it ideal for replacement projects, system expansions, or maintenance of existing Silent Knight installations.  \u003c\/p\u003e\n\u003ch2\u003eKey Features of the SK-PHOTO-W Smoke Detector\u003c\/h2\u003e\n\u003cp\u003e• Intelligent photoelectric smoke detector\u003cbr\u003e• Modern low profile design\u003cbr\u003e• White housing for clean installation\u003cbr\u003e• Enhanced optical sensing chamber\u003cbr\u003e• Programmable sensitivity from control panel\u003cbr\u003e• Continuous sensitivity monitoring\u003cbr\u003e• Point ID capability for precise detector location\u003cbr\u003e• Rotary decimal address switches\u003cbr\u003e• Plug in detector for easy installation\u003cbr\u003e• Designed for commercial fire alarm systems\u003cbr\u003e• Replaced by SS-PHOTO\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003e• Commercial buildings\u003cbr\u003e• Office buildings\u003cbr\u003e• Healthcare facilities\u003cbr\u003e• Schools and universities\u003cbr\u003e• Retail environments\u003cbr\u003e• Industrial facilities\u003c\/p\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Silent Knight\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e SK-PHOTO-W\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Intelligent Photoelectric Smoke Detector\u003cbr\u003e\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003cbr\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Plug in\u003cbr\u003e\u003cstrong\u003eAddressing:\u003c\/strong\u003e Rotary decimal switches\u003cbr\u003e\u003cstrong\u003eMonitoring:\u003c\/strong\u003e Continuous sensitivity monitoring\u003cbr\u003e\u003cstrong\u003eReplacement Model:\u003c\/strong\u003e SS-PHOTO\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eSilent Knight SK-PHOTO-W Intelligent Photoelectric Smoke Detector\u003c\/strong\u003e delivers reliable detection, easy maintenance, and modern design for professional fire alarm installations.\u003c\/p\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eWhat is a silent knight smoke detector?\u003c\/b\u003e It is an intelligent, commercial-grade fire protection device manufactured by Silent Knight that connects to compatible fire alarm panels to detect smoke and trigger system alarms.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHow to put a smoke detector in silent mode?\u003c\/b\u003e Commercial addressable detectors like the SK-PHOTO-W cannot be placed in silent mode directly at the device; silencing alarms or muting trouble signals must be performed at the main fire alarm control panel by authorized personnel.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWhere is this Silent Knight smoke detector commonly used?\u003c\/b\u003e It is designed for commercial and institutional environments, including office buildings, healthcare facilities, schools, universities, retail spaces, and industrial facilities.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIs the SK-PHOTO-W an addressable smoke detector?\u003c\/b\u003e Yes. It is an intelligent addressable detector featuring Point ID capability set via rotary decimal switches, allowing the control panel to identify its exact location and continuously monitor its sensitivity.\u003c\/p\u003e","brand":"Silent Knight","offers":[{"title":"Default Title","offer_id":43132802138336,"sku":"SK-PHOTO-W","price":86.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/silent-knight-smoke-detectors-default-title-silent-knight-sk-photo-w-addressable-smoke-detector-31897010012384.jpg?v=1763279525"},{"product_id":"silent-knight-sk-photo-r-w-smoke-detector-with-remote-test-capability","title":"Silent Knight SK-PHOTO-R-W Smoke Detector With Remote Test Capability","description":"\u003ch2\u003eSilent Knight SK-PHOTO-R-W Intelligent Photoelectric Smoke Detector With Remote Test Capability In Duct DNR\/DNRW\u003c\/h2\u003e","brand":"Silent Knight","offers":[{"title":"Default Title","offer_id":43132845064416,"sku":"SK-PHOTO-R-W","price":97.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/silent-knight-smoke-detectors-default-title-silent-knight-sk-photo-r-w-smoke-detector-with-remote-test-capability-31897010503904.jpg?v=1763279795"},{"product_id":"system-sensor-2d51-photoelectronic-low-profile-plug-in-detector","title":"System Sensor 2D51 Photoelectronic Low-Profile Plug-In Detector","description":"\u003ch2\u003eSystem Sensor 2D51 Photoelectronic Low-Profile Plug-In Detector for Special Applications\u003cbr\u003e\n\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132846768352,"sku":"2D51","price":80.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2d51-photoelectronic-low-profile-plug-in-detector-31897157304544.jpg?v=1763277165"},{"product_id":"system-sensor-2wtr-b-smoke-detector-with-a-thermal-sensor","title":"System Sensor 2WTR-B Smoke Detector with a Thermal Sensor","description":"\u003ch2\u003eSystem Sensor 2WTR-B  2-Wire Photoelectric i3 Smoke Detector with a Thermal Sensor and Form C Relay\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eThroughout the i3 series, installation is simple with its installer-friendly base and plug-in design.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe base accommodates a broad range of back box and direct mounting options and provides ample space for pre-wiring the device.\u003c\/p\u003e\n\u003cp\u003eTo complete the installation, the i3 detector plugs into its base with a simple Stop-Drop ’N Lock action.\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132846801120,"sku":"2WTR-B","price":72.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-2wtr-b-smoke-detector-with-a-thermal-sensor-31897161498848.jpg?v=1763279832"},{"product_id":"system-sensor-4wtar-b-smoke-detector-and-thermal-sensor","title":"System Sensor 4WTAR-B Smoke Detector and Thermal Sensor","description":"\u003ch2\u003eThe \u003cstrong\u003eSystem Sensor 4WTAR-B Photoelectric i3 Series Smoke Detector\u003c\/strong\u003e is a reliable conventional fire detection solution designed for fast installation, intelligent performance, and simplified maintenance.\u003c\/h2\u003e\n\u003cp\u003eFeaturing a built in sounder, thermal sensor, and Form C relay, this 4 wire smoke detector provides enhanced life safety protection for commercial and residential applications.\u003c\/p\u003e\n\u003cp\u003ePart of the trusted i3 Series, the 4WTAR-B uses advanced drift compensation and smoothing algorithms to reduce nuisance alarms caused by dust, RF interference, and environmental changes. These intelligent features help maintain long term detection accuracy while minimizing unnecessary service calls.\u003c\/p\u003e\n\u003cp\u003eThe integrated 85 dB sounder provides immediate local notification during alarm conditions, while the built in Form C relay allows easy integration with auxiliary devices and control systems. The addition of a thermal sensor enhances detection capabilities by responding to both smoke and heat conditions for improved safety.\u003c\/p\u003e\n\u003cp\u003eThe System Sensor 4WTAR-B also includes red and green LED indicators for clear visual status during power up, standby, alarm, maintenance, and freeze trouble conditions. When used with compatible modules such as the 2W-MOD2 or RRS-MOD, the detector supports remote maintenance signaling and synchronized sounder activation across multiple devices.\u003c\/p\u003e\n\u003cp\u003eIdeal for offices, schools, healthcare facilities, retail spaces, and commercial buildings, the 4WTAR-B delivers dependable performance with easy installation and maintenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• Photoelectric smoke detection with thermal sensor\u003cbr\u003e• 4 wire conventional detector with built in sounder\u003cbr\u003e• Integrated 85 dB temporal alarm tone\u003cbr\u003e• Form C relay for auxiliary device control\u003cbr\u003e• Drift compensation and smoothing algorithms reduce nuisance alarms\u003cbr\u003e• Red and green LED status indicators\u003cbr\u003e• Compatible with RRS-MOD sounder synchronization module\u003cbr\u003e• Remote maintenance signaling with compatible modules\u003cbr\u003e• Easy installation and maintenance design\u003cbr\u003e• White finish for clean professional appearance\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e• Manufacturer: System Sensor\u003cbr\u003e• Model: 4WTAR-B\u003cbr\u003e• Series: i3 Series\u003cbr\u003e• Detection Type: Photoelectric Smoke with Thermal Sensor\u003cbr\u003e• Wiring: 4 Wire\u003cbr\u003e• Sounder: Built In 85 dB\u003cbr\u003e• Relay: Form C\u003cbr\u003e• Color: White\u003cbr\u003e• Application: Conventional Fire Alarm Systems\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132847096032,"sku":"4WTAR-B","price":89.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/system-sensor-smoke-detectors-default-title-system-sensor-4wtar-b-smoke-detector-and-thermal-sensor-34910635327712.jpg?v=1763277197"},{"product_id":"system-sensor-wck-200b-white-detector-conversion-kit","title":"System Sensor WCK-200B White Detector Conversion Kit","description":"\u003ch2\u003eSystem Sensor WCK-200B White Detector Conversion Kit for SSD Intelligent Low-Profile Photo, Ion and Laser Detectors Package of 10 White Trim Rings and 10 White Detectors Bright White Color Will Match the White of SSD A\/V Products\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43132868886752,"sku":"WCK-200B","price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/system-sensor-smoke-detectors-default-title-system-sensor-wck-200b-white-detector-conversion-kit-35329514537184.jpg?v=1763277681"},{"product_id":"fire-lite-sd365-iv-addressable-smoke-detector-ivory","title":"Fire-Lite SD365-IV Addressable Smoke Detector Ivory","description":"\u003ch2\u003eFire-Lite SD365-IV Addressable Low-Profile Photoelectric Smoke Detector, Ivory, Clip Litespeed, B300-6 Base Included\u003c\/h2\u003e\n\u003cp\u003eFire-Lite SD365-IV Addressable Low-Profile Photoelectric Smoke Detector, Ivory, Clip Litespeed, B300-6 Base Included. For compatible initiating devices, browse our \u003ca href=\"https:\/\/thefirealarmsupplier.com\/products\/fire-lite-bg-12lx-dual-action-pull-station\"\u003e\u003cstrong\u003emanual fire alarm pull station\u003c\/strong\u003e\u003c\/a\u003e options.\u003c\/p\u003e","brand":"Fire-Lite","offers":[{"title":"Default Title","offer_id":43132870131936,"sku":"SD365-IV","price":197.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/fire-lite-smoke-detectors-default-title-fire-lite-sd365-iv-addressable-smoke-detector-ivory-31896816910560.jpg?v=1763277717"},{"product_id":"fire-lite-sd365r-photoelectric-smoke-detector","title":"Fire-Lite SD365R White Intelligent Photoelectric Smoke Detector","description":"\u003ch2\u003eFire-Lite SD365R Low-Profile Addressable Photoelectric Smoke Detector, Remote Test Capable, for use with DNR\/DNRW, LiteSpeed Only, White (Replaces SD355R)\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eIt's designed for both performance and aesthetics and is a direct replacement for the SD355 Series.\u003c\/p\u003e\n\u003cp\u003eThe SD365R is exclusively used with FireLite's addressable fire alarm control panels and has remote test capability. \u003cbr\u003e\u003c\/p\u003e","brand":"Fire-Lite","offers":[{"title":"Default Title","offer_id":43132871999712,"sku":"SD365R","price":97.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/fire-lite-smoke-detectors-default-title-fire-lite-sd365r-photoelectric-smoke-detector-31896819794144.jpg?v=1769662275"},{"product_id":"fire-lite-sd365t-addressable-smoke-and-thermal-detector","title":"Fire-Lite SD365T Addressable Smoke and Thermal Detector","description":"\u003ch2\u003eFire-Lite SD365T Addressable Photoelectric Smoke Detector with a Built-in 135°F (57°C) Fixed-Temperature Thermal Device, LiteSpeed Only, White\u003cbr\u003e\n\u003c\/h2\u003e","brand":"Fire-Lite","offers":[{"title":"Default Title","offer_id":43132872130784,"sku":"SD365T","price":105.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/fire-lite-smoke-detectors-default-title-fire-lite-sd365t-addressable-smoke-and-thermal-detector-32309096644832.jpg?v=1763277775"},{"product_id":"fire-lite-sd365r-iv-replacement-duct-smoke-detector-ivory","title":"Fire-Lite SD365R-IV Replacement Duct Smoke Detector Ivory","description":"\u003ch2\u003eFire-Lite SD365R-IV Intelligent Photoelectric Replacement Duct Smoke Detector with Remote Test Capability, Ivory, Clip and Litespeed\u003c\/h2\u003e","brand":"Fire-Lite","offers":[{"title":"Default Title","offer_id":43132877570272,"sku":"SD365R-IV","price":219.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/fire-lite-smoke-detectors-default-title-fire-lite-sd365r-iv-replacement-duct-smoke-detector-ivory-31896819925216.jpg?v=1763277877"},{"product_id":"fire-lite-sd365t-iv-addressable-low-profile-photoelectric-smoke-detector","title":"Fire-Lite SD365T-IV Addressable Photoelectric Smoke Detector","description":"\u003ch2\u003eFire-Lite SD365T-IV Addressable Low-Profile Photoelectric Smoke Detector W\/ Thermal Sensor, Ivory, Clip and Litespeed, Includes Base\u003c\/h2\u003e","brand":"Fire-Lite","offers":[{"title":"Default Title","offer_id":43132877603040,"sku":"SD365T-IV","price":222.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/fire-lite-smoke-detectors-default-title-fire-lite-sd365t-iv-addressable-low-profile-photoelectric-smoke-detector-31896820416736.jpg?v=1763277887"},{"product_id":"simplex-4098-5252-photoelectric-smoke-sensor-with-isolator","title":"Simplex 4098-5252 Photoelectric Smoke Sensor with Isolator","description":"\u003ch2\u003eSimplex 4098-5252 Photoelectric Smoke Sensor with Isolator\u003c\/h2\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43132908011744,"sku":"4098-5252","price":39.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/simplex-smoke-detectors-default-title-simplex-4098-5252-photoelectric-smoke-sensor-with-isolator-31897047269600.jpg?v=1763278145"},{"product_id":"gentex-s1209-917-0059-002-replaced-by-s-917-0070-002","title":"Gentex S1209 (917-0059-002) - 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The PAD300-PD features drift compensation and has a built-in dirty detector warning.\u003c\/p\u003e\n\u003cp\u003eThe PAD300-PD and the control panel communicate over a proven and robust digital communication path, and the system analyzes the information on the particular device. The polling speed is less than five (5) seconds, well under the UL requirements.\u003c\/p\u003e\n\u003cp\u003eThe detector is compatible with any PAD300 series detector base and twists on. The PAD300-PD is addressed using DIP switches in the rear of the detector and can be easily programmed in the field without special tools.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow profile, less than 2 inches with the base.\u003c\/li\u003e\n\u003cli\u003eWide selectable sensitivity range of 1.1 to 3.5%\/foot.\u003c\/li\u003e\n\u003cli\u003eThe detector communicates sensitivity to the control panel.\u003c\/li\u003e\n\u003cli\u003eUL listed smoke calibration and sensitivity.\u003c\/li\u003e\n\u003cli\u003eOptional locking tab to prevent unwanted removal.\u003c\/li\u003e\n\u003cli\u003eSimple DIP switch address setting, no programming tool required.\u003c\/li\u003e\n\u003cli\u003eMagnetic test switch.\u003c\/li\u003e\n\u003cli\u003eLED alarm indicator.\u003c\/li\u003e\n\u003cli\u003eThe product includes a 5-year warranty.\u003c\/li\u003e\n\u003cli\u003eUUKL Listed for Smoke Control.\u003c\/li\u003e\n\u003cli\u003eUL268 7th edition compliant.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Bases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAll bases will mount on a single gang, 3-1\/2” octagon, 3-1\/2” square, double gang, 4” octagon, 4” square, 50mm c\/c, 60mm c\/c and 70mm c\/c boxes.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePAD300-4DB - 4” Detector Base.\u003c\/li\u003e\n\u003cli\u003ePAD300-6DB - 6” Detector Base.\u003c\/li\u003e\n\u003cli\u003ePAD300-IB - 6” base with an isolator module included.\u003c\/li\u003e\n\u003cli\u003ePAD300-RB - 6” base with one Form-C relay contact. 2A @ 30VDC, 0.5A @ 125VAC.\u003c\/li\u003e\n\u003cli\u003ePAD300-SB - 6\" base with sounder module included. Sound pattern is provided from external source.\u003c\/li\u003e\n\u003cli\u003ePAD300-LFSB - 6” base with 520Hz sounder module included. Sound pattern is provided from external source.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Potter","offers":[{"title":"Default Title","offer_id":43702305161440,"sku":"PAD300-PD","price":74.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/potter-smoke-detectors-default-title-potter-pad300-pd-low-profile-smoke-detector-31896927142112.jpg?v=1763281351"},{"product_id":"edwards-siga-osd-smoke-detector-replaces-siga-pd","title":"Edwards SIGA-OSD Smoke Detector (Replaces SIGA-PD)","description":"\u003ch2\u003eEdwards SIGA-OSD Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eThe Signature Optica Series SIGA-OSD smoke detector brings advanced optical sensing technology to a practical design that increases efficiency, saves installation time, cuts costs, and extends life safety and property protection capabilities.\u003c\/p\u003e\n\u003cp\u003eContinuous self-diagnostics ensure reliability over the long-haul, while environmental compensation helps reduce maintenance costs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLike all Signature Optica Series detectors, the SIGA-OSD is an intelligent device that gathers analog information from multiple optical sensors, converting this data into digital signals.\u003c\/p\u003e\n\u003cp\u003eUtilizing dual optical wavelengths combined with multiple detection angles, the SIGA-OSD differentiates particles that are not representative of actual smoke. Particle data is input into digital filters which feed a series of ratios removing signal patterns that are typical of nuisance sources, thus reducing unwanted alarms.\u003c\/p\u003e\n\u003cp\u003eTo make an alarm decision, the detector’s on-board microprocessor measures and analyzes all optical sensor readings and compares this information to preprogrammed settings.\u003c\/p\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":43766700572896,"sku":"SIGA-OSD","price":68.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/edwards-smoke-detectors-default-title-edwards-siga-osd-smoke-detector-replaces-siga-pd-32319533121760.jpg?v=1763282377"},{"product_id":"edwards-siga-oshd-optical-smoke-sensor","title":"Edwards SIGA-OSHD Optical Smoke Sensor","description":"\u003ch2\u003eEdwards SIGA-OSHD Optical Smoke Sensor and Rate-of-Rise Heat Sensor\u003c\/h2\u003e\n\u003cp\u003eContinuous self-diagnostics ensure reliability over the long haul, while environmental compensation helps reduce maintenance costs.\u003cbr\u003e\u003cbr\u003eThe SIGA-OSHD provides an optical smoke sensor and a rate-of-rise heat sensor with a fixed temperature setting. Together, these sensors efficiently detect smoldering and fast-flaming fires.\u003cbr\u003e\u003cbr\u003eLike all Signature Optica Series detectors, the SIGA-OSHD is an intelligent device that gathers analog information from multiple optical sensors, converting this data into digital signals. Utilizing dual optical wavelengths combined with multiple detection angles, the SIGA-OSHD differentiates particles not representative of actual smoke.\u003c\/p\u003e\n\u003cp\u003eParticle data is input into digital filters which feed a series of ratios removing signal patterns typical of nuisance sources, thus reducing unwanted alarms. To make an alarm decision, the detector’s onboard microprocessor measures and analyzes all-optical sensor readings and compares this information to preprogrammed settings.\u003c\/p\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":43766700638432,"sku":"SIGA-OSHD","price":81.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/edwards-smoke-detectors-default-title-edwards-siga-oshd-optical-smoke-sensor-31896777752800.jpg?v=1763282331"},{"product_id":"siemens-op121-s54372-f1-a1-smoke-detector","title":"Siemens OP121 (S54372-F1-A1) Smoke Detector","description":"\u003ch2\u003eSiemens OP121(S54372-F1-A1) Photoelectric Smoke Detector\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eModel OP121 from Siemens - Fire Safety is a photoelectric smoke detector with microprocessor-controlled, self-diagnostic circuitry, eliminating the need for burdensome sensitivity test equipment.\u003c\/p\u003e\n\u003cp\u003eModel OP121 also comes with a new magnet-test feature. The magnet-test feature allows installers and test personnel to prove the integrity of the wiring and proper connection to the fire alarm control panel (FACP).\u003c\/p\u003e\n\u003cp\u003eThe auto-sensitivity feature for Model OP121 stems from the internal self-monitoring circuitry and provides dynamic verification of sensitivity and\/or required maintenance.\u003c\/p\u003e\n\u003cp\u003eThe auto-sensitivity feature is displayed by Siemens Fire Safety’s unique (3) three-color light-emitting diode (LED), provided locally on the detector ─ and optionally with the various remote LED indicators.\u003cbr\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43773973496032,"sku":"OP121","price":67.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/siemens-smoke-detectors-default-title-siemens-op121-s54372-f1-a1-smoke-detector-31896973443296.jpg?v=1763282457"},{"product_id":"edwards-721ut","title":"Edwards 721UT","description":"\u003cp\u003eEdwards 721UT Smoke Detector Head Only, Photoelectric, Two-Wire W\/Integral Heat, Output For Remote Led.\u003c\/p\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":43777844642016,"sku":"721UT","price":63.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/edwards-smoke-detectors-default-title-edwards-721ut-31896718868704.jpg?v=1763283031"},{"product_id":"siemens-fdo421-s54320-f4-a1-smoke-detector","title":"Siemens FDO421 (S54320-F4-A1) Smoke Detector","description":"\u003ch2\u003eSiemens FDO421 (S54320-F4-A1) Photoelectric Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eModel FDO421 incorporates an optical sensor using a light-scattering detection principle.\u003c\/p\u003e\n\u003cp\u003eThe device utilizes advanced software algorithms to analyze the signals and provides highly stable and accurate smoke detection.\u003c\/p\u003e\n\u003cp\u003eModel FDO421 also uses state-of-the-art microprocessor circuitry with error checks, detector self-diagnostics, and supervision programs. Each detector is UL 268 7th edition listed, incorporating advanced built-in ISOtechnologyTM - True Class-X SLC operation (use is optional), greatly improving system reliability and circuit integrity while providing advanced addressable fault finding.\u003c\/p\u003e\n\u003cp\u003eThe unit fits into one (1) wall-or-ceiling footprint and only occupies one (1) address on the signal-line circuit (SLC). Model FDO421 is a plug-in, two-wire, addressable photoelectric smoke detector whose value is increased with a built-in ISOtechnology feature. Model FDO421 is Underwriters’ Laboratories Listed [UL268A Listed for direct in-air duct usage].\u003c\/p\u003e\n\u003cp\u003eEach detector comprises a dust-resistant photoelectric chamber and microprocessor-based electronics with a low-profile plastic housing. Every Model FDO421 fire detector is shipped with a protective dust cover.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43777856241888,"sku":"FDO421","price":117.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/siemens-smoke-detectors-default-title-siemens-fdo421-s54320-f4-a1-smoke-detector-31998410522848.jpg?v=1763283132"},{"product_id":"edwards-siga-pcd","title":"Edwards SIGA-PCD Carbon Monoxide Detector (Replaced by SIGA-OSCD)","description":"\u003ch2\u003eEdwards SIGA-PCD Intelligent Carbon Monoxide Detector.\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eSIGA-PCD is discontinued. Use direct replacement, \u003ca href=\"https:\/\/thefirealarmsupplier.us\/products\/edwards-siga-oscd\"\u003eSIGA-OSCD\u003c\/a\u003e.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":43777870561504,"sku":"SIGA-PCD","price":268.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/edwards-smoke-detectors-default-title-edwards-siga-pcd-31896776474848.jpg?v=1763283328"},{"product_id":"edwards-siga-pd-smoke-detector-replaced-by-siga-osd","title":"Edwards SIGA-PD Smoke Detector (Replaced by SIGA-OSD)","description":"\u003ch2\u003eEdwards SIGA-PD Intelligent Photoelectric Smoke Detector that uses an optical sensing chamber to detect smoke (Replaced by \u003cstrong\u003e\u003ca href=\"https:\/\/thefirealarmsupplier.us\/products\/edwards-siga-osd\"\u003eSIGA-OSD\u003c\/a\u003e)\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe detector's microprocessor analyzes sensor readings and compares them to historical data to decide whether to trigger an alarm.\u003c\/p\u003e\n\u003cp\u003eDigital filters remove signal patterns that are not typical of fires, which can help eliminate unwanted alarms.\u003c\/p\u003e\n\u003cp\u003eFeatures of the Edwards SIGA-PD\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNext-generation optical smoke-sensing technology\u003c\/li\u003e\n\u003cli\u003eUses existing wiring\u003c\/li\u003e\n\u003cli\u003eAutomatic device mapping\u003c\/li\u003e\n\u003cli\u003eUp to 250 total signature addresses per loop\u003c\/li\u003e\n\u003cli\u003eTwo levels of environmental compensation\u003c\/li\u003e\n\u003cli\u003eTwenty pre-alarm settings\u003c\/li\u003e\n\u003cli\u003eFive sensitivity settings\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":43777870627040,"sku":"SIGA-PD","price":123.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/edwards-smoke-detectors-default-title-edwards-siga-pd-smoke-detector-replaced-by-siga-osd-31896779358432.jpg?v=1763283294"},{"product_id":"mircom-mix-2351tap-smoke-and-thermal-sensor","title":"Mircom MIX-2351TAP Smoke and Thermal Sensor","description":"\u003ch2\u003eMircom MIX-2351TAP Intelligent Ul Photo Smoke W\/ Thermal Sensor White\u003c\/h2\u003e","brand":"Mircom","offers":[{"title":"Default Title","offer_id":43836138619104,"sku":"MIX-2351TAP","price":159.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/mircom-smoke-detectors-default-title-mircom-mix-2351tap-smoke-and-thermal-sensor-31896879661280.jpg?v=1763283562"},{"product_id":"system-sensor-4witar-b-smoke-detector-and-thermal-sensor","title":"System Sensor 4WITAR-B Smoke Detector and Thermal Sensor","description":"\u003ch2\u003eSystem Sensor 4WITAR-B Photoelectric i3 Smoke Detector with Isolated Thermal Sensor, 4-Wire, Built-in Sounder, Form Relay, White\u003cbr\u003e\n\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":44058642186464,"sku":"4WITAR-B","price":87.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/system-sensor-smoke-detectors-default-title-system-sensor-4witar-b-smoke-detector-and-thermal-sensor-31897156845792.jpg?v=1764151755"}],"url":"https:\/\/thefirealarmsupplier.com\/collections\/smoke-detectors.oembed?page=8","provider":"The Fire Alarm Supplier","version":"1.0","type":"link"}