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The Edwards SIGA-DDOS is the Optica intelligent duct smoke detector for Signature Series systems, built for the moisture and dust found in HVAC ductwork. Its optical sensing tube compares readings with historical data and time patterns to filter out signals that are not typical of fires.
- Photoelectric sensing, 1.5 to 4.5 %/ft obscuration
- Air velocity 100 to 4,000 ft/min; pressure differential 0.01 to 0.83 in. of water
- 15.2 to 19.95 VDC; 50 µA standby, 60 µA alarm
- One Form C alarm relay: 3.0 A at 30 VDC or 120 VAC, 1.5 A at 240 VAC
- Alarm, test and normal LEDs; −20 °F to 158 °F
- Conformally coated boards and separate sensing and control sections
- UL, ULC, CSFM and FM listed
Uses the same duct openings as SuperDuct detectors for easy retrofit. Exhaust tube included; sampling tube (SD-T8 to SD-T120) ordered separately.
| Brand | Edwards |
|---|---|
| Manufacturer part number | SIGA-DDOS |
| Product type | Duct Detectors |
| Shipping weight | 0.99 lb |
| Condition | Brand new, factory sealed |
| Warranty | 1 year |
| Currency | Canadian dollars (CAD) |
Need a manual, listing or cut sheet that is not here? Email info@jemsystems.ca with the part number.
- Delivery across Canada in 2 to 4 business days.
- Free shipping on orders over $250 CAD.
- Returns within 30 days of the invoice date for unused items in original packaging, with an RMA number. Restocking fees may apply. See our refund policy.
- 1 year warranty on all products.
- Questions about an order? Email customerservicegroup@jemsystems.ca or call +1 909 235-5810.

