The sampling tube is identified by a series of air inlet holes on the tube. The sampling tube is always installed with the air inlet hole facing into the air flow. For duct widths greater than 18 inch, sampling tubes must be purchased separately. The recommended length is specified below. It is also recommended that the sampling tube length extend at least 2/3 across the duct width for optimal performance. Sampling tubes over 3ft long must be supported at the end opposite the duct smoke detector.
Main Features
- Metal Sampling Tube for 8'-12' Duct Widths
- Air Inlet Holes for Efficient Sampling
- Install with Inlet Hole Facing Air Flow
- Separate Purchase for Ducts >18 Inches
- Recommended Length Extends 2/3 Across Duct
- Support Required for Tubes >3ft Long