{"product_id":"edwards-est-siga-sd-signature-series-intelligent-addressable-duct-smoke-detector","title":"Edwards EST SIGA-SD Signature Series Intelligent Addressable Duct Smoke Detector","description":"\u003ch4 class=\"PDq2pG_selectionAnchorContainer\"\u003eDescription\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp dir=\"auto\" data-start=\"16\" data-end=\"396\"\u003e\u003cmeta charset=\"UTF-8\"\u003eThe Edwards EST SIGA-SD is a Signature Series intelligent addressable duct smoke detector designed to detect smoke within HVAC supply and return ductwork. Edwards EST part number SIGA-SD combines photoelectric light-scattering detection, onboard signal processing, environmental compensation, and an auxiliary Form C relay for fire alarm monitoring and HVAC control applications.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\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\u003eEdwards EST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFire Alarm \u0026amp; Life Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSIGA-SD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAddressable Duct Smoke Detectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSignature Series \/ SuperDuct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntelligent Addressable Duct Smoke Detector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePhotoelectric Light-Scattering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEdwards Signature Data Circuit \/ SLC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAddressing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eElectronic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15.2–19.95 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 µA Standby; 45 µA Addressable Alarm; 18 mA Standalone Alarm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSmoke Sensitivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.79–2.46% Obscuration\/ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAir Velocity Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100–4,000 ft\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAir Pressure Differential\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.005–1.00 in. Water Column\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Relay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne Form C Auxiliary Relay, 2.0 A at 30 VDC Resistive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Test Response Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 Seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIndicators\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGreen Power LED; Red Alarm LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 to 158 °F (-29 to 70 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 93% RH, Noncondensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWire Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14–22 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.70 × 5.45 × 1.90 in. (221 × 138 × 48 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSampling Tube\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eField Installed; Ordered Separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Tube\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 2.4 lb (1.1 kg)\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\"\u003eSIGA-SD\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eThe SIGA-SD is an intelligent SuperDuct detector from the Edwards EST Signature Series, engineered for integration with compatible Signature data loops and fire alarm control systems. Its low-profile housing incorporates a photoelectric smoke sensor, clear removable cover, status LEDs, conformally coated electronics, and connections for field-installed sampling tubes. Air drawn from the duct is analyzed by onboard electronics that use digital filtering, historical data, and differential sensing to distinguish rapid smoke-related changes from gradual contamination or environmental drift. Electronic addressing, automatic device mapping, self-diagnostics, maintenance reporting, dirty-sensor indication, remote test\/reset support, and nonvolatile operating history simplify system commissioning and ongoing service.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eIntelligent Addressable Operation: Communicates over the Edwards Signature data circuit with electronic device addressing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePhotoelectric Smoke Detection: Uses the light-scattering principle to detect combustion particles sampled from HVAC duct airflow.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWide Airflow Capability: Rated for duct velocities from 100 to 4,000 ft\/min when the required pressure differential is maintained.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEnvironmental Compensation: Differential sensing compensates for gradual environmental changes and contamination without shifting alarm performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable Smoke Sensitivity: Provides a specified sensitivity range of 0.79 to 2.46% obscuration per foot.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBuilt-In Alarm Relay: Includes one Form C auxiliary relay rated at 2.0 A at 30 VDC resistive for ancillary control functions.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLocal Status Indication: Green power and red alarm LEDs remain visible through the clear detector cover.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMagnetic Functional Testing: Built-in magnet-activated test capability allows convenient detector testing at the housing.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMaintenance Diagnostics: Identifies dirty or defective sensing conditions and stores diagnostic information in nonvolatile memory.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLow-Profile Construction: Housing depth of approximately 1.90 inches supports installation where duct clearance is restricted.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFlexible Sampling Tube Installation: Sampling tubes can be positioned in 45-degree increments for alignment with duct airflow.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemote Accessories Support: Compatible with remote alarm LED and magnetic or keyed test\/reset stations.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe SIGA-SD delivers the reliability and precision required for intelligent HVAC duct smoke detection and integration with commercial fire alarm and smoke-control systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp id=\"p-rc_c7b8f4fae39e183e-25\"\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Edwards","offers":[{"title":"Default Title","offer_id":52804404445482,"sku":"SIGA-SD","price":279.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_79eacc3b-2daf-4b13-bf07-d0b00c4a6088.webp?v=1790789796","url":"https:\/\/iqelectro.com\/products\/edwards-est-siga-sd-signature-series-intelligent-addressable-duct-smoke-detector","provider":"IQElectro","version":"1.0","type":"link"}