System Sensor dst3 Duct Sampling Tube 3 Feet Steel

Product Description

The SYSTEM SENSOR dst3 is a steel duct sampling tube designed for use with duct-mounted smoke or air quality detectors in HVAC systems. The tube spans the width of the duct and draws air samples through a series of drilled holes along its full length, giving the connected detector consistent, representative airflow readings. At 3 feet long, this tube is sized for ducts up to that width. HVAC technicians and fire-protection contractors install this component as part of a complete duct detector assembly in commercial and light-commercial air handling systems.

The dst3 is intended for duct detector installations where the sampling tube must extend at least five-eighths of the way across the duct width for accurate air sampling. The 3-foot length fits a range of commercial duct sizes. It is installed with the air inlet holes oriented directly into the airflow path to ensure proper draw. This tube pairs with compatible SYSTEM SENSOR duct detector housings and is a common component in building automation and life-safety HVAC applications.

Key Features

• Steel construction provides durability in demanding duct environments
• Holes drilled along the full length of the tube for uniform air sampling
• Must extend at least five-eighths across the duct width for optimal detector performance
• Air inlet holes face into the airflow for accurate sampling
• Locking tab design secures the tube in place and allows removal without tools by releasing the front or rear tab

Compatibility

Designed for use with SYSTEM SENSOR duct detector housings requiring a 3-foot sampling tube. The correct tube length must match the width of the duct where the detector is installed.

Installation Notes

Installation is performed by licensed HVAC technicians or fire-protection contractors in accordance with NFPA 72 and applicable local codes. Power down the air handling unit and related detection circuits before servicing the duct detector assembly. Insert the tube with the drilled air inlet holes facing directly into the airflow, and confirm the tube extends at least five-eighths of the duct width before locking into position. Verify the locking tabs are fully engaged before restoring power.

Technical Specifications

• Product Type: Sampling Tube
• Material: Steel
• Length: 3 feet

Standard Information

• Brand: SYSTEM SENSOR
• Manufacturer Part Number: dst3