{"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)\u003cbr\u003e\n\u003c\/h2\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 Photoelectric i3 Series Smoke Detector, 4-Wire, Thermal Sensor, Form Relay, White\u003cbr\u003e\n\u003c\/h2\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":49.15,"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 Fire Detector | Smoke Sensor","description":"\u003ch2\u003eThe Simplex 4098-9714 is a photoelectric smoke detector designed for high-performance detection in commercial, industrial, and institutional fire alarm systems.\u003c\/h2\u003e\n\u003cp\u003eFeaturing addressable TrueAlarm technology, it delivers accurate and reliable sensing using a pulsed LED light source and a silicon photodiode receiver—ideal for modern fire safety systems.\u003c\/p\u003e\n\u003ch3\u003eIntelligent Sensing with Minimal False Alarms\u003c\/h3\u003e\n\u003cp\u003eThis Simplex smoke detector offers user-selectable sensitivity levels (0.2%, 0.5%, and 1% per foot), as well as a standard detection range from 1.25% to 3.1%. Its adaptive algorithm ensures consistent performance and helps reduce false alarms—making it a trusted choice for mission-critical environments.\u003c\/p\u003e\n\u003ch3\u003eDurable Design for Industrial Use\u003c\/h3\u003e\n\u003cp\u003eBuilt with a NEMA 1 rated enclosure and a sleek white finish, the 4098-9714 integrates seamlessly with Simplex TrueAlarm control panels. Its rugged design ensures longevity, while supporting simplified maintenance and system compatibility in industrial and commercial settings.\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\u003e\u003cbr\u003e\n\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\u003eIt's a compact, cost-effective sensor with a louvered design to capture smoke and direct it to the chamber. The chamber is also easy to access for cleaning. \u003cbr\u003e\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 \u003cstrong\u003eSystem Sensor 2W-B Two-Wire Photoelectric Smoke Detector\u003c\/strong\u003e is designed for reliable fire detection and easy installation in residential, commercial, and light industrial applications. Part of the advanced \u003cstrong\u003eSystem Sensor i3 Series\u003c\/strong\u003e, this detector offers intelligent features such as drift compensation, remote maintenance signaling, and plug-in installation for faster deployment and simplified maintenance.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e2W-B\u003c\/strong\u003e is compatible with most existing alarm system control panels, making it an ideal upgrade or replacement for conventional two-wire smoke detection systems.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cp\u003e• Two-wire photoelectric smoke detector\u003cbr\u003e• Compatible with most existing alarm control panels\u003cbr\u003e• Plug-in detector with included mounting base\u003cbr\u003e• Built-in drift compensation for reduced maintenance\u003cbr\u003e• Remote maintenance signaling capability\u003cbr\u003e• Wide-angle dual-color LED status indication\u003cbr\u003e• Stop-Drop N Lock™ installation design\u003cbr\u003e• Large wire entry port for easier wiring\u003cbr\u003e• In-line terminals with SEMS screws\u003cbr\u003e• Built-in test switch for simplified testing\u003cbr\u003e• EZ Walk loop testing capability\u003cbr\u003e• Direct ceiling mount or back box mounting options\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eIntelligent Detection and Maintenance\u003c\/h3\u003e\n\u003cp\u003eThe System Sensor 2W-B includes \u003cstrong\u003eautomatic drift compensation\u003c\/strong\u003e, allowing the detector to adjust sensitivity as dust and environmental conditions change. This helps reduce nuisance alarms and ensures long-term reliability.\u003c\/p\u003e\n\u003cp\u003eWhen used with compatible modules or panels, the detector provides \u003cstrong\u003eremote maintenance alerts\u003c\/strong\u003e, allowing technicians to quickly identify detectors that require servicing.\u003c\/p\u003e\n\u003cp\u003eThe optional \u003cstrong\u003eSENS-RDR wireless sensitivity reader\u003c\/strong\u003e enables quick sensitivity measurement in percent per foot obscuration, simplifying maintenance and inspection.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEasy Installation\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003ei3 Series plug-in design\u003c\/strong\u003e allows installers to pre-wire bases before installing detector heads, saving time during installation. The \u003cstrong\u003eStop-Drop N Lock™\u003c\/strong\u003e feature makes attaching the detector fast and secure.\u003c\/p\u003e\n\u003cp\u003eFlexible mounting options include:\u003c\/p\u003e\n\u003cp\u003e• Octagonal back boxes\u003cbr\u003e• Single gang 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 visual status:\u003c\/p\u003e\n\u003cp\u003e• Green LED: Normal standby operation\u003cbr\u003e• Red LED: Alarm condition\u003cbr\u003e• Additional indications: Maintenance required or trouble condition\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eAdvanced Testing Features\u003c\/h3\u003e\n\u003cp\u003eWhen connected to the \u003cstrong\u003e2W-MOD2 maintenance module\u003c\/strong\u003e or compatible panels, the \u003cstrong\u003eEZ Walk loop test\u003c\/strong\u003e feature allows technicians to verify wiring and detector status quickly using LED indicators at each device.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e• Type: Two-wire photoelectric smoke detector\u003cbr\u003e• Technology: Photoelectric sensing\u003cbr\u003e• Wiring: Two-wire system\u003cbr\u003e• Mounting: Ceiling or back box mount\u003cbr\u003e• Indicators: Dual-color LED\u003cbr\u003e• Installation: Plug-in detector with base included\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• Schools\u003cbr\u003e• Retail stores\u003cbr\u003e• Healthcare facilities\u003cbr\u003e• Residential systems\u003cbr\u003e• Light industrial environments\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhy Choose the System Sensor 2W-B?\u003c\/h3\u003e\n\u003cp\u003eThe System Sensor 2W-B delivers intelligent smoke detection, easy installation, and reduced maintenance requirements. With drift compensation, remote maintenance capability, and compatibility with most existing control panels, it is a reliable and cost-effective fire detection solution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e System Sensor\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e 2W-B\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Two-Wire Photoelectric Smoke Detector\u003cbr\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e i3 Series\u003cbr\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Most existing alarm system control panels\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-smoke-and-heat-detector-2-wire","title":"System Sensor 2WT-B Smoke and Heat Detector 2-Wire","description":"\u003ch2\u003eSystem Sensor 2WT-B Photoelectric i3 Series Smoke and Heat Detector, 2-Wire, 135F Fixed Thermal Sensor, White (Replaces 2100T)\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003eIt utilizes a photoelectric detection method and a 135F fixed thermal sensor to provide reliable detection of smoke and heat. Its plug-in design and large wire entry port make it easy to install and wire neatly, while the base accommodates various mounting methods.\u003c\/p\u003e\n\u003cp\u003eThe i3 line also offers intelligent features, such as drift compensation and smoothing algorithms, to minimize nuisance alarms and simplify testing and maintenance. The detector has wide-angle red and green LED indicators that provide instant inspection of its condition, including normal standby, out-of-sensitivity, alarm, or freeze trouble.\u003c\/p\u003e\n\u003cp\u003eThe i3 series is compatible with the 2W-MOD2 loop test\/maintenance module or a panel with the i3 protocol, providing additional features such as remote LED indication of maintenance signals and EZ Walk loop test feature. Overall, the System Sensor 2WT-B is a reliable and convenient smoke detector for commercial and residential buildings.\u003cbr\u003e\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\u003eFire-Lite SD365 Addressable Photoelectric Smoke Detector LiteSpeed Only White Replaced by SS-PHOTO\u003c\/h2\u003e\n\u003cp\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 SD365 delivers accurate smoke detection for commercial and industrial fire alarm applications.\u003c\/p\u003e\n\u003cp\u003eUsing advanced photoelectric sensing technology, the Fire-Lite SD365 detects smoke particles produced by smoldering fires, providing early warning and helping reduce nuisance alarms. The intelligent addressable design allows the fire alarm control panel to continuously monitor detector status and sensitivity for improved system reliability.\u003c\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\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\/p\u003e\n\u003ch2\u003eKey Features of the Fire-Lite SD365\u003c\/h2\u003e\n\u003cp\u003e• Addressable photoelectric smoke detector\u003cbr\u003e• LiteSpeed-compatible\u003cbr\u003e• Intelligent addressable technology\u003cbr\u003e• Early warning smoke detection\u003cbr\u003e• Reduced nuisance alarms\u003cbr\u003e• Plug-in design for easy installation\u003cbr\u003e• White low-profile housing\u003cbr\u003e• Continuous sensitivity monitoring\u003cbr\u003e• Ideal 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• Schools and universities\u003cbr\u003e• Healthcare facilities\u003cbr\u003e• Retail environments\u003cbr\u003e• Industrial facilities\u003cbr\u003e• Fire alarm system upgrades and maintenance\u003c\/p\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003eBrand: Fire-Lite\u003cbr\u003eModel: SD365\u003cbr\u003eType: Addressable Photoelectric Smoke Detector\u003cbr\u003eProtocol: LiteSpeed-only\u003cbr\u003eColor: White\u003cbr\u003eInstallation: Plug-in\u003cbr\u003eReplacement Model: SS-PHOTO\u003c\/p\u003e\n\u003cp\u003eThe Fire-Lite SD365 Addressable Photoelectric Smoke Detector delivers dependable smoke detection, easy installation, and reliable performance for LiteSpeed-compatible fire alarm systems.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eFire-Lite SD365 Addressable Photoelectric Smoke Detector\u003c\/strong\u003e delivers dependable smoke detection, easy installation, and reliable performance for LiteSpeed-compatible fire alarm systems.\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","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":76.85,"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":86.0,"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","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":211.6,"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) - Replaced by S (917-0070-002)","description":"\u003ch2\u003eGentex S1209 (917-0059-002) Single\/Multiple Station Smoke Alarm, Temporal 3 Audible Signal 120 VAC\/9V\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e","brand":"Gentex","offers":[{"title":"Default Title","offer_id":43133086204128,"sku":"S1209","price":41.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/gentex-smoke-detectors-default-title-gentex-s1209-917-0059-002-replaced-by-s-917-0070-002-31896845353184.jpg?v=1763280507"},{"product_id":"gentex-s1209f-917-0057-002-replaced-by-sr-917-0071-002","title":"Gentex S1209F (917-0057-002) - Replaced by SR (917-0071-002)","description":"\u003ch2\u003eGentex S1209F (917-0057-002) Photoelectric Smoke Alarm - Replaced by \u003ca href=\"https:\/\/thefirealarmsupplier.com\/products\/sr-917-0071-002\"\u003eSR (917-0071-002)\u003c\/a\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe S1209 Series photoelectric smoke alarms are for use as an evacuation device in all dwelling units, including but not limited to homes, apartments, hospitals, hotels, and motels.\u003c\/p\u003e\n\u003cp\u003eAvailable in two models, the S1209 Series is engineered to virtually eliminate nuisance alarms and deliver outstanding performance wherever reliable smoke detection is required. The S1209 Series has a 9V alkaline battery for backup if building power is lost.\u003c\/p\u003e\n\u003cp\u003eThe battery drawer provides easy replacement without removing the unit from the wall or ceiling.\u003c\/p\u003e\n\u003cp\u003eThe Gentex S1209 Series has a push button self-test and functionality test feature. The push button self-test verifies power operation and tests battery levels. The push and hold button functionality test analyzes the photoelectric sensing chamber to operate the smoke alarm properly.\u003c\/p\u003e\n\u003cp\u003eThe self and functionality tests comply with NFPA 72 and ANSI\/UL Standards.\u003c\/p\u003e\n\u003cp\u003eFeatures of the smoke alarm series include DUALINK® tandem capabilities with Gentex tandem interconnect capable alarm products. Options include Form A\/Form C dry contacts for remote annunciation. The S1209 smoke alarms are ANSI\/UL 217 and are warranted for one year from the date of purchase.\u003cspan style=\"font-size: 0.875rem;\" data-mce-style=\"font-size: 0.875rem;\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Gentex","offers":[{"title":"Default Title","offer_id":43133086236896,"sku":"S1209F","price":44.65,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/gentex-smoke-detectors-default-title-gentex-s1209f-917-0057-002-replaced-by-sr-917-0071-002-31896845713632.jpg?v=1763280520"},{"product_id":"hochiki-soc-24v-conventional-smoke-detector-replaced-by-soe-24v","title":"Hochiki SOC-24V Conventional Smoke Detector (Replaced by SOE-24V)","description":"\u003ch2\u003eHochiki SOC-24V Conventional Photoelectric Smoke Detector (Replaced by SOE-24V)\u003cbr\u003e\n\u003c\/h2\u003e","brand":"Hochiki","offers":[{"title":"Default Title","offer_id":43133088563424,"sku":"SOC-24V","price":35.25,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/hochiki-smoke-detectors-default-title-hochiki-soc-24v-conventional-smoke-detector-replaced-by-soe-24v-31896848302304.jpg?v=1763280533"},{"product_id":"siemens-fdot421-s54320-f6-a1-multi-sensor-smoke-detector","title":"Siemens FDOT421 (S54320-F6-A1) Multi-Sensor Smoke Detector","description":"\u003ch2\u003eSiemens FDOT421 (S54320-F6-A1) Multi-Sensor Smoke Detector Fire Alarm\u003c\/h2\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43133097574624,"sku":"FDOT421","price":113.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/siemens-smoke-detectors-default-title-siemens-fdot421-s54320-f6-a1-multi-sensor-smoke-detector-31896953094368.jpg?v=1763280574"},{"product_id":"simplex-4098-5202-1","title":"Simplex 4098-5202","description":"\u003ch2\u003eSimplex 4098-5202 Photo Sensor with Mx Technology\u003c\/h2\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43133098492128,"sku":"4098-5202","price":487.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/simplex-smoke-detectors-default-title-simplex-4098-5202-31897047728352.jpg?v=1763280605"},{"product_id":"simplex-gsa4098-9714-smoke-detector-1","title":"Simplex GSA4098-9714 Smoke Detector","description":"\u003ch2\u003eSimplex GSA4098-9714 Photo-Sensor Smoke Detector\u003c\/h2\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":43133113106656,"sku":"GSA4098-9714","price":68.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/simplex-smoke-detectors-default-title-simplex-gsa4098-9714-smoke-detector-31897144131808.jpg?v=1763279971"},{"product_id":"silent-knight-sk-photo-t-w-intelligent-photoelectric-smoke-detector","title":"Silent Knight SK-PHOTO-T-W Intelligent Photoelectric Smoke Detector","description":"\u003ch2\u003eSilent Knight SK-PHOTO-T-W Intelligent Photoelectric Smoke Detector and Temperature Sensor\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h2\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Silent Knight","offers":[{"title":"Default Title","offer_id":43133132636384,"sku":"SK-PHOTO-T-W","price":103.55,"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-t-w-intelligent-photoelectric-smoke-detector-31897009357024.jpg?v=1763280105"},{"product_id":"mircom-mix-2351ap-advanced-protocol-intelligent-photoelectric-smoke-sensor","title":"Mircom MIX-2351AP Addressable Photoelectric Smoke Sensor","description":"\u003ch2\u003eMircom MIX-2351AP Intelligent Addressable Plug in Smoke Detector Replaces MIX-2251AP and MIX-2251B\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eMircom MIX-2351AP Intelligent Addressable Plug in Smoke Detector\u003c\/strong\u003e delivers advanced detection technology and flexible configuration for modern commercial fire alarm systems. Designed to replace \u003cstrong\u003eMIX-2251AP and MIX-2251B\u003c\/strong\u003e, this intelligent detector features improved performance, easier maintenance, and enhanced reliability.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eMIX-2351AP\u003c\/strong\u003e includes a redesigned optical sensing chamber engineered to meet more stringent code standards. This enhanced detection capability improves early warning performance while reducing nuisance alarms in challenging environments.\u003c\/p\u003e\n\u003cp\u003eWith \u003cstrong\u003eprogrammable sensitivity\u003c\/strong\u003e, the detector can be adjusted through the control panel to match specific environmental conditions. The \u003cstrong\u003ePoint ID capability\u003c\/strong\u003e provides precise device identification, allowing maintenance teams to quickly locate detectors requiring service.\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003emulti sensor detector\u003c\/strong\u003e combines \u003cstrong\u003ephotoelectric smoke detection and thermal sensing\u003c\/strong\u003e using dual electronic thermistors with \u003cstrong\u003e135°F 57°C fixed temperature detection\u003c\/strong\u003e, providing additional protection and improved response to different fire conditions.\u003c\/p\u003e\n\u003cp\u003eBuilt for easy installation and maintenance, the \u003cstrong\u003eMircom MIX-2351AP\u003c\/strong\u003e continuously monitors sensitivity levels and reports status to the fire alarm control panel. The detector also supports \u003cstrong\u003eremote testing\u003c\/strong\u003e, making it suitable for use in duct smoke detection applications.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cp\u003e• Intelligent addressable plug in smoke detector\u003cbr\u003e• Replaces MIX-2251AP and MIX-2251B\u003cbr\u003e• Multi sensor detection smoke and heat\u003cbr\u003e• Redesigned optical sensing chamber\u003cbr\u003e• Programmable sensitivity settings\u003cbr\u003e• Continuous sensitivity monitoring\u003cbr\u003e• Point ID capability for precise location\u003cbr\u003e• Dual thermistor thermal sensing\u003cbr\u003e• 135°F 57°C fixed temperature heat detection\u003cbr\u003e• Remote test capability\u003cbr\u003e• Advanced high speed communication protocol\u003cbr\u003e• Modern low profile design\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• Industrial facilities\u003cbr\u003e• Duct smoke detection applications\u003cbr\u003e• Fire alarm system upgrades and replacements\u003c\/p\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Mircom\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e MIX-2351AP\u003cbr\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Intelligent Addressable Multi Sensor Detector\u003cbr\u003e\u003cstrong\u003eDetection:\u003c\/strong\u003e Photoelectric Smoke and Heat\u003cbr\u003e\u003cstrong\u003eHeat Detection:\u003c\/strong\u003e 135°F 57°C fixed temperature\u003cbr\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Plug in\u003cbr\u003e\u003cstrong\u003eAddressing:\u003c\/strong\u003e Point ID capable\u003cbr\u003e\u003cstrong\u003eReplacement Models:\u003c\/strong\u003e MIX-2251AP, MIX-2251B\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eMircom MIX-2351AP Intelligent Addressable Plug in Smoke Detector\u003c\/strong\u003e offers reliable detection, flexible configuration, and improved performance for modern fire alarm installations.\u003c\/p\u003e","brand":"Mircom","offers":[{"title":"Default Title","offer_id":43133146104032,"sku":"MIX-2351AP","price":59.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/mircom-smoke-detectors-default-title-mircom-mix-2351ap-advanced-protocol-intelligent-photoelectric-smoke-sensor-38307114156256.png?v=1763280322"},{"product_id":"system-sensor-2251tb-smoke-thermal-detector","title":"System Sensor 2251TB Smoke Thermal Detector","description":"\u003ch2\u003eSystem Sensor 2251TB Smoke Thermal Detector\u003c\/h2\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":43133152592096,"sku":"2251TB","price":136.95,"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-2251tb-smoke-thermal-detector-31897156780256.jpg?v=1763280403"},{"product_id":"napco-gem-smk-wireless-smoke-detector-1","title":"Napco GEM-SMK Wireless Smoke Detector","description":"\u003ch2\u003eNapco GEM-SMK Wireless Smoke Detector for Napco Systems\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLong 5-Year battery life\u003c\/li\u003e\n\u003cli\u003eCompact 5.2\" diameter; attractive decorator white\u003c\/li\u003e\n\u003cli\u003eBuilt-in silence feature and test button\u003c\/li\u003e\n\u003cli\u003eVisual LED indicates alarm and standby\u003c\/li\u003e\n\u003cli\u003eAudible \/ visual indicator for low battery and need for detector cleaning\u003c\/li\u003e\n\u003cli\u003eProven Gemini wireless crystal-controlled transmitter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Napco","offers":[{"title":"Default Title","offer_id":43203190128864,"sku":"GEM-SMK","price":104.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/napco-smoke-detectors-default-title-napco-gem-smk-wireless-smoke-detector-34893912441056.jpg?v=1764151742"},{"product_id":"potter-pad200-pd-photoelectric-smoke-sensor","title":"Potter PAD200-PD Photoelectric Smoke Sensor","description":"\u003ch2\u003ePotter PAD200-PD Photoelectric Smoke Sensor (Replaced by \u003ca href=\"https:\/\/thefirealarmsupplier.us\/products\/potter-pad300-pd\"\u003ePAD300-PD\u003c\/a\u003e)\u003c\/h2\u003e","brand":"Potter","offers":[{"title":"Default Title","offer_id":43203190489312,"sku":"PAD200-PD","price":72.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/potter-smoke-detectors-default-title-potter-pad200-pd-photoelectric-smoke-sensor-36739405906144.png?v=1763281056"},{"product_id":"potter-pad300-pd-low-profile-smoke-detector","title":"Potter PAD300-PD Low-Profile Smoke Detector","description":"\u003ch2\u003ePotter PAD300-PD detector is made of durable plastic in an off-white color to blend in with the ceiling\u003c\/h2\u003e\n\u003cp\u003eThe Photoelectric Smoke Detector is a listed Analog Addressable smoke detector compatible with fire alarm control panels that utilize the Potter Addressable Device (PAD) protocol.\u003c\/p\u003e\n\u003cp\u003eThe PAD300-PD has a sensitivity range of 1.1 to 3.5 % per foot and is UL-listed. 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":66.25,"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-2251tfb-photoelectric-heat-combination-sensor","title":"Edwards 2251TFB Photoelectric-Heat Combination Sensor","description":"\u003ch2\u003eEdwards 2251TFB Photoelectric-Heat Combination Sensor - Analog\u003c\/h2\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":43777814560992,"sku":"(DO NOT USE) 2251TFB","price":289.85,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/edwards-smoke-detectors-default-title-edwards-2251tfb-photoelectric-heat-combination-sensor-31896691376352.webp?v=1763282498"},{"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":"siemens-hfpo-11-replaced-by-hfp-11","title":"Siemens HFPO-11 (Replaced by HFP-11)","description":"\u003ch2\u003eSiemens HFPO-11 Photo Detector (FS-250 Only).\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis item has been discontinued. \u003cspan style=\"font-size: 0.875rem;\"\u003e\u003ca href=\"https:\/\/thefirealarmsupplier.us\/products\/hfp-11-siemens\"\u003eUse direct replacement HFP-11.\u003c\/a\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":43777865449696,"sku":"(DO NOT USE) HFPO-11","price":235.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/products\/siemens-smoke-detectors-default-title-siemens-hfpo-11-replaced-by-hfp-11-32021702836448.jpg?v=1763283210"},{"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":113.7,"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"}],"url":"https:\/\/thefirealarmsupplier.com\/collections\/smoke-detectors.oembed?page=9","provider":"The Fire Alarm Supplier","version":"1.0","type":"link"}