The System Sensor DST5 is a high-performance metal duct sampling tube engineered for reliable smoke detection in heavy-duty HVACR environments. Designed specifically for duct widths from 4 ft to 8 ft, this 5-foot steel tube is a necessary gas/smoke detection accessory for any technician installing Conventional and Intelligent Duct Smoke Detectors. Unlike plastic alternatives, this InnovairFlex DST5 sampling tube features durable metal construction that resists wear and physical damage in high-velocity air streams ranging from 100 to 4,000 FPM. Its standardized hole pattern ensures a consistent and representative sample of the air column is delivered back to the duct smoke detector head. The DST5 is cross-compatible with the System Sensor D4120 and InnovairFlex series, making it a versatile HVAC duct sensor accessory for the most demanding commercial air handling units where precise detection and code compliance are non-negotiable. Wide Compatibility: Seamlessly integrates with both addressable and conventional duct smoke detectors, including the D4120 and D2E models. Extended Reach: Optimized for industrial duct smoke detection in systems spanning 48 to 96 inches. Durable Construction: Heavy-duty metal duct sampling tube prevents vibration-induced fatigue in high-velocity airflow environments. Precise Sampling: Features a calibrated intake hole sequence to ensure accurate detection throughout the duct cross-section. Common Questions & Technical Advice What is the maximum duct width for a DST5 sampling tube? The System Sensor DST5 is rated for duct widths between 4 feet and 8 feet. For ducts wider than 8 feet, you must transition to the DST10 model to ensure the tube extends at least 5/8 of the way across the duct for valid sampling. Can the DST5 be used in round ducting? Yes, as part of the InnovairFlex product line, this sampling tube works in both rectangular and round configurations. Professionals prefer the metal DST series for round ducts to maintain structural integrity during the duct detector installation process. How do I install the tube for optimal airflow? Proper HVAC smoke detector maintenance starts with orientation. Ensure the intake holes face directly into the airflow. A metal sampling tube should be securely seated and filtered according to the specific sensor head requirements. This item is not eligible for free shipping. 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.
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