{"product_id":"simplex-4098-9751-in-duct-smoke-sensor-housing-ready-to-ship","title":"4098-9751 | Simplex TrueAlarm In-Duct Smoke Sensor Housing with Relay","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003eThe Simplex 4098-9751 is a TrueAlarm in-duct smoke sensor housing designed for use in HVAC air handling systems. It provides a local relay output and supports both two-wire and four-wire configurations, ensuring reliable duct smoke detection in commercial and institutional applications.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSimplex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePanel Accessories\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4098-9751\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEnclosure Accessory\/Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTrueAlarm in-duct smoke sensor housing with optional relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Sensors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSimplex 4098-9714 TrueAlarm analog sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18–32 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 mA @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRemote LED Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.6 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 A @ 28 VDC (power limited) \/ 0.5 A @ 120 VAC (non-power limited)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperation Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-wire (no relay) \/ 4-wire (relay included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15° to 122°F (-9° to 50°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUL Temp Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32° to 100°F (0° to 38°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10–90% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWiring Connections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTerminal blocks for 18–14 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIn-duct installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHVAC duct smoke detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStatus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eActive \/ Legacy depending on system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.00 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003e4098-9751\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe 4098-9751 housing is engineered to mount a spot-type TrueAlarm analog sensor directly into an HVAC duct, allowing smoke detection in environments with limited airflow or small duct sizes where traditional sampling tubes are impractical. It is designed to support Simplex model 4098-9714 TrueAlarm sensors and provides relay contacts rated for both DC and AC applications. For four-wire operation, the housing includes a programmable relay powered by the fire alarm system, while in two-wire operation it functions without relay output. Built with durable construction and reliable terminal block connections, the 4098-9751 ensures supervised performance in challenging HVAC installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIn-Duct Smoke Detection: Mounts spot-type sensors directly into duct airflow.\u003c\/li\u003e\n\u003cli\u003eLocal Relay Output: Rated 1A @ 28 VDC (power-limited) or 0.5A @ 120 VAC (non-power limited).\u003c\/li\u003e\n\u003cli\u003eDual Operation: Supports both 2-wire (no relay) and 4-wire (relay included) modes.\u003c\/li\u003e\n\u003cli\u003eTrueAlarm Compatibility: Accepts 4098-9714 TrueAlarm analog smoke sensors.\u003c\/li\u003e\n\u003cli\u003eWide Operating Range: Functions between 15° and 122°F (-9° to 50°C).\u003c\/li\u003e\n\u003cli\u003eHumidity Tolerance: Operates in environments up to 90% RH (non-condensing).\u003c\/li\u003e\n\u003cli\u003eSupervised Wiring: Terminal block connections for 18–14 AWG conductors.\u003c\/li\u003e\n\u003cli\u003eRemote LED Support: 0.6 mA current draw without affecting alarm current.\u003c\/li\u003e\n\u003cli\u003eUL Listed: Certified for life safety system integration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 4098-9751 delivers the reliability and precision required for effective duct smoke detection in HVAC fire safety applications.\u003c\/p\u003e","brand":"Simplex","offers":[{"title":"Default Title","offer_id":50644324090154,"sku":"4098-9751","price":357.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_bec6133c-9418-4de6-adca-4619767a3162.webp?v=1759237014","url":"https:\/\/iqelectro.com\/products\/simplex-4098-9751-in-duct-smoke-sensor-housing-ready-to-ship","provider":"IQElectro","version":"1.0","type":"link"}