{"product_id":"system-sensor-d4120-duct-smoke-detector","title":"System Sensor D4120 4-Wire Photoelectric Duct Smoke Detector","description":"\u003ch2\u003eSystem Sensor D4120 Duct Smoke Detector\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSystem Sensor D4120\u003c\/strong\u003e is a commercial 4-wire photoelectric duct smoke detector designed for HVAC duct applications where smoke detection and equipment shutdown\/control functions are required.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4-wire photoelectric duct smoke detector\u003c\/li\u003e\n\u003cli\u003eIntegrated low-flow technology\u003c\/li\u003e\n\u003cli\u003eAir velocity range: 100 to 4,000 ft\/min\u003c\/li\u003e\n\u003cli\u003e24 VAC\/DC or 120 VAC power\u003c\/li\u003e\n\u003cli\u003eTwo DPDT Form-C relay contacts for fan shutdown and auxiliary control\u003c\/li\u003e\n\u003cli\u003eBuilt-in Test\/Reset button\u003c\/li\u003e\n\u003cli\u003eLED status indication\u003c\/li\u003e\n\u003cli\u003eInterconnect capability for multi-fan shutdown\u003c\/li\u003e\n\u003cli\u003ePlug-in sensor head for service and maintenance\u003c\/li\u003e\n\u003cli\u003eCompatible with System Sensor InnovairFlex accessories\u003c\/li\u003e\n\u003cli\u003eUL listed and FM approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHVAC Shutdown Applications\u003c\/h3\u003e\n\u003cp\u003eThe D4120 includes auxiliary relay contacts that can be used for HVAC fan shutdown and related control functions when designed and wired for the specific equipment and approved sequence of operation. Duct detector shutdown wiring should be coordinated with the HVAC equipment, fire alarm system, electrical controls and applicable code requirements.\u003c\/p\u003e\n\n\u003ch3\u003eCommercial Fire Alarm Service in Austin\u003c\/h3\u003e\n\u003cp\u003eSecurity Tekton \/ Avenger Security provides duct detector replacement, troubleshooting, fire alarm monitoring, HVAC shutdown verification and commercial fire alarm service throughout Austin, Round Rock, Georgetown, Cedar Park, Pflugerville, Hutto and Central Texas.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e System Sensor\u003cbr\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e D4120\u003cbr\u003e\n\u003cstrong\u003eDetection:\u003c\/strong\u003e Photoelectric\u003cbr\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e 4-wire\u003cbr\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 24 VAC\/DC or 120 VAC\u003cbr\u003e\n\u003cstrong\u003eAir Velocity:\u003c\/strong\u003e 100–4,000 ft\/min\u003cbr\u003e\n\u003cstrong\u003eRelay Outputs:\u003c\/strong\u003e Two DPDT Form-C\u003cbr\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e HVAC duct smoke detection and fan shutdown\/control\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e A duct smoke detector is not a substitute for open-area smoke detection or the building's required fire alarm detection system. Final installation, wiring, shutdown sequence and testing must follow the approved design, equipment instructions and applicable AHJ requirements.\u003c\/p\u003e","brand":"System Sensor","offers":[{"title":"Default Title","offer_id":48142359625905,"sku":"D4120","price":226.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/4000\/9393\/files\/dscn1455.jpg?v=1793827178","url":"https:\/\/securitytekton.com\/products\/system-sensor-d4120-duct-smoke-detector","provider":"Avenger Security","version":"1.0","type":"link"}