Edwards Signaling SD-T42 Duct Detector Accessory, 42" Sampling Tube

Optimize duct smoke monitoring with the Edwards Signaling SD-T42 42-inch sampling tube — a purpose-built duct detector accessory that extends reliable air sampling across HVAC runs for faster smoke detection and fewer false alarms. As part of the SuperDuct family, this sampling tube is engineered for straightforward, low-profile installation in tight plenums and long duct runs, enabling better surveillance and life-safety performance without costly modifications.

The SD-T42 works seamlessly with Edwards Signaling/Kidde four-wire duct smoke detectors (compatible with SD-4WJ) and supports standard 20 V DC detector inputs, making it an ideal choice for commercial and industrial security and monitoring systems. At 42 inches in length with a compact profile, it lets you position intake points precisely where air sampling is most effective, helping your fire detection system respond earlier to airborne smoke while simplifying HVAC integration.

Designed for facilities managers, integrators, and fire-life-safety professionals, the SD-T42 improves overall system reliability and reduces installation time. Add this sampling tube to your duct smoke detector setup to strengthen building security and HVAC monitoring — order now to streamline your next installation.

• Extends reliable smoke sampling across HVAC ducts for faster, more accurate smoke detection and improved facility safety
• 42-inch rigid sampling tube designed for easy installation into large duct runs and tight plenum spaces
• Plug-and-play compatibility with Edwards Signaling/Kidde four-wire duct smoke detectors (e.g., SD-4WJ) for seamless integration
• Lightweight, US-made construction and low-profile form factor simplify retrofit and new-construction installations
• Supports centralized monitoring and HVAC interlock strategies to reduce false alarms and enhance building security