System Sensor DST1.5 Tube

The System Sensor DST1.5 is a professional-grade metal duct sampling tube engineered specifically for air pressure and smoke detection in ducts measuring between 1 and 2 feet in width. Designed for seamless integration with both intelligent duct smoke detectors and conventional models, such as the InnovairFlex D4120 and D2 series, this steel component is critical for capturing representative air samples across the duct cross-section. Field technicians appreciate the front-loading installation capability, which allows the tube to be securely locked into place via front or rear tabs without specialized tooling. To ensure NFPA compliance and accurate HVAC smoke detection, the tube features precision-drilled inlet holes that must face the direction of airflow. Its 18.2-inch length ensures the tube extends at least 5/8 across the duct width, optimizing sensor performance in air velocities ranging from 100 to 4,000 feet per minute. This durable duct detector accessory is UL listed, providing a reliable solution for commercial fire safety systems.

• Universal Compatibility: Works with a broad range of System Sensor duct detectors, including the D4120, D4S, and DNRE models.
• Rugged Steel Construction: The metal sampling tube provides superior durability compared to plastic alternatives in high-velocity air handling units.
• Tool-Free Installation: Features a patented quick-connect design that simplifies maintenance and replacement in tight mechanical spaces.
• High-Velocity Performance: Optimized for accurate sampling in airflows up to 4,000 FPM, reducing the risk of false alarms.

How do I ensure the DST1.5 is installed correctly?
The intake holes must face directly into the airflow. The tube must be inserted until it clicks into the housing, ensuring it extends at least 5/8 of the way across the duct width for a valid air sample.

Can this tube be used in ducts larger than 24 inches?
No, for duct widths exceeding 2 feet, you must step up to the DST3 or a larger model to maintain the required coverage across the air stream.

Is the DST1.5 compatible with addressable systems?
Yes, it is designed for use with both addressable (intelligent) and conventional 4-wire or 2-wire duct smoke detection systems.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.