Edwards Signaling SD-T18 SD Series SuperDuct 18" Air Sample Tube for Duct Smoke Detectors

Optimize duct smoke monitoring in confined HVAC runs with the Edwards Signaling SD-T18 SuperDuct 18in air sample tube. This sampling tube is engineered for B2B installations where space is limited—its sub‑2" depth enables fast, clean mounting in narrow ducts and tight plenums. The SD-T18 uses a PCB‑mounted photoelectric sensor with onboard intelligence and patented differential sensing to provide stable, drift‑free performance, even across wide environmental changes. It supports high air velocity applications up to 4000 ft/min and delivers a broad smoke sensitivity range (0.79%–2.46% per foot), giving integrators reliable smoke detection for commercial HVAC, data centers, and security-critical spaces. Rated for operation from -4°F to 158°F, the SuperDuct tube is compatible with Edwards/Kidde Intelligent detectors and the four‑wire SD-4WJ duct smoke detector, and ships with a prewired detector base to speed commissioning. Ideal for fire monitoring, building security and surveillance integration, the SD-T18 minimizes downtime while improving detection accuracy. Add the SD-T18 to your duct smoke detection zones today or contact us for system design and ordering assistance.

• Slim, less-than-2" profile simplifies installation in tight ductwork and HVAC plenums
• Trusted Edwards Signaling photoelectric sensing with patented differential compensation for stable, drift‑free monitoring
• Handles high air velocities up to 4000 ft/min for reliable detection in demanding HVAC systems
• Wide sensitivity range (0.79%–2.46% per ft) for accurate smoke response across applications
• Prewired detector base and compatibility with SD-4WJ/Kidde Intelligent detectors reduce install time and service costs