The Kidde SD-T78 is a 78-inch rigid metal air sampling tube for the SuperDuct line of conventional duct smoke detectors. It draws air from the HVAC duct into the detector's photoelectric sensing chamber through a series of inlet holes along its length, providing reliable smoke sampling across wide commercial ductwork.
Built for the commercial installer
The tube installs from either the front side or back side of the detector housing without opening the unit. Inlet holes rotate in 45-degree increments to align with airflow regardless of mounting orientation. Standard spacing matches the SuperDuct detector assembly for a direct drop-in replacement of existing tubes or initial installs.
Key features
- 78-inch length covers wide HVAC ductwork in a single run
- Rotates in 45-degree increments to align air inlet holes with any airflow direction
- Front or back installation - slides into either side of the detector housing
- No detector disassembly required - tube seats into place without removing the detector cover
- Rigid metal construction for long-term reliability in commercial HVAC environments
Compatibility
Pairs with all Kidde SuperDuct SD-4W series duct smoke detectors and controllers. Supports air velocity from 100 to 4,000 ft/min.
What duct detectors does the SD-T78 work with?
Can this tube be installed without opening the detector?
How do I align the air holes with the airflow?
What sampling tube length do I need?
Spec Sheet
