Introducing the Kidde SD-T120 SuperDuct 120" Air Sample Tube, designed specifically for duct smoke detectors. This innovative product is less than 2 inches deep, making it perfect for installations in tight spaces. Equipped with a PCB-mounted photoelectric sensor, it features advanced on-board intelligence for enhanced performance. Additionally, the patented differential sensing technology provides environmental compensation, ensuring reliable operation in various conditions. Upgrade your smoke detection system with this efficient and compact solution. Don't wait—secure your safety today with the Kidde SD-T120!