{"product_id":"edwards-est-siga-ddos-optica-duct-detector","title":"Edwards EST SIGA-DDOS Optica Duct Detector","description":"\u003cp\u003eThe Edwards EST SIGA-DDOS Optica intelligent duct smoke detector provides addressable photoelectric smoke detection for HVAC ducts on Signature Series loops, with wide 100 to 4,000 ft\/min air velocity coverage and environmental compensation for stable, drift-free sensitivity. Its shallow housing, removable Optica tube assembly, and conformally coated electronics simplify installation and maintenance, while the built-in Form C relay can shut down fans or HVAC equipment on alarm. \u003c\/p\u003e\n\u003cp\u003eKey Specifications: Type: \u003c\/p\u003e\n\u003cp\u003eIntelligent addressable Optica duct smoke detector \u003cbr\u003eCore Function(s): Continuously samples duct air and initiates alarm and auxiliary control when smoke exceeds the programmed sensitivity Loop\/Protocol:Signature SLC \u003cbr\u003ePower: 15.2 to 19.95 VDC; 50 μA standby, 60 μA alarm \u003cbr\u003eIndicators\/UI: Green LED (normal), red LED (alarm), amber LED (test); magnet-activated test switch on housing \u003cbr\u003eSensing: Photoelectric (light-scattering) Optica sensing, 1.5% to 4.5%\/ft obscuration range \u003cbr\u003eOperating Range: 100 to 4,000 ft\/min air velocity; -20 to 158 °F (-29 to 70 °C), 0 to 93% RH noncondensing \u003cbr\u003eAlarm Relay: One Form C auxiliary relay, 3 A @ 30 VDC or 120 VAC\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eCompatible Bases \u0026amp; Accessories: \u003cbr\u003eSD-T8 – 8 in sampling tube \u003cbr\u003eSD-T18 – 18 in sampling tube \u003cbr\u003eSD-T24 – 24 in sampling tube \u003cbr\u003eSD-T36 – 36 in sampling tube \u003cbr\u003eSD-T42 – 42 in sampling tube \u003cbr\u003eSD-T60 – 60 in sampling tube \u003cbr\u003eSD-T78 – 78 in sampling tube \u003cbr\u003eSIGA-LED – Remote alarm LED \u003cbr\u003eSD-TRM – Magnetic remote test\/reset station with alarm LED \u003cbr\u003eSD-TRK – Keyed remote test\/reset station with alarm LED \u003cbr\u003eSD-MAG – Test magnet kit SD-VTK – Air velocity test kit \u003cbr\u003eSIGA-DDOSIB – Replacement interface board \u003cbr\u003eSIGA-DDOS-ROT – Replacement optical sensor tube assembly \u003cbr\u003eDDOS-RET – Replacement exhaust tube Space Age SSU-WP-1 – Weatherproof enclosure option for outdoor or drip-prone installs \u003c\/p\u003e\n\u003cp\u003eSystem Compatibility: Compatible with Edwards Signature loop controllers and Signature Series fire alarm control panels. \u003c\/p\u003e\n\u003cp\u003eReplaces: SIGA-SD\u003c\/p\u003e","brand":"EDWARDS","offers":[{"title":"Default Title","offer_id":52809750217024,"sku":"SIGA-DDOS","price":450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/6466\/0032\/files\/SIGA-DDOS.webp?v=1784147461","url":"https:\/\/firealarmsys.com\/products\/edwards-est-siga-ddos-optica-duct-detector","provider":"FIRE ALARM SYS","version":"1.0","type":"link"}