Introducing the Edwards Signaling SD-T78 SuperDuct 70" Air Sample Tube, expertly designed for duct smoke detectors. With a sleek profile of less than 2" deep, it fits seamlessly into tight spaces, making installation a breeze. This innovative tube features a PCB-mounted photoelectric sensor equipped with advanced intelligence for optimal performance. Its patented differential sensing technology ensures environmental compensation, providing reliable and stable sensitivity without drift. Capable of handling high air velocities up to 4000 ft/min, it is compatible with standard Kidde Intelligent detectors. Upgrade your smoke detection system today with the SD-T78 and experience unparalleled safety and reliability!