Kidde Edwards SD-T18 Air Sampling Tube Duct Detector

Product Description

The KIDDE EDWARDS SD-T18 is an 18-inch air sampling tube designed for use with duct smoke detectors. The tube extends into the ductwork to draw an air sample across the detector sensing chamber, enabling the detector to monitor airborne smoke particles within HVAC duct systems. This type of sampling tube is a critical component in commercial and residential air-handling unit (AHU) installations where duct smoke detection is required by code. Installation is performed by licensed fire alarm or HVAC technicians as part of a compliant duct detector assembly.

The SD-T18 is suited for use in duct detector applications where an 18-inch sampling tube length is specified by system design or duct dimensions. It is sold as an individual unit and is intended as either a replacement component or a new-installation accessory for compatible KIDDE EDWARDS duct smoke detector housings. Technicians select tube length based on duct width to ensure proper airflow sampling across the duct cross-section.

Key Features

• 18-inch length sized for mid-range duct widths requiring extended air sampling reach
• Designed to interface with compatible KIDDE EDWARDS duct smoke detector housings
• Draws representative air samples from within the duct airstream for accurate smoke detection
• Sold individually for single-tube replacement or new installation use

Compatibility

Designed as an OEM-style replacement or accessory sampling tube for compatible KIDDE EDWARDS duct smoke detector assemblies requiring an 18-inch air sampling tube.

Installation Notes

Installation should be performed by a qualified fire alarm technician or licensed HVAC professional in accordance with NFPA 72 and applicable local codes. Disconnect and lock out power to the air-handling unit and fire alarm control panel before servicing the duct detector assembly. Insert the sampling tube through the designated port in the duct detector housing and into the ductwork per the manufacturer instructions. Do not modify the tube length or obstruct the sampling ports.