duct detector for sale, brand-new and used.

SD505-ADHR Duct Detector Housing With Relay Module Silent Knight Honeywell new open package.

Brand new in box opened for pictures

System Sensor Innovair Coil, 0073 For Use With The SSK451 Multi-Signaling Accessory And The DH400 Series Duct Smoke Detector Includes: Coil Assembly Retrofit Bracket 1 #4-40 x 3/16" Pan Phillips Head Screw Black Coil Wire New In Box Thank You For Your Interest

System Sensor Innovair Coil400, 0081 For Use With The SSK451 Multi-Signaling Accessory And The DH400 Series Duct Smoke Detector Includes: Coil Assembly Retrofit Bracket Instructions 1 Each #4-40 x 3/16" Pan and Flat Phillips Head Screw New In Box Thank You For Your Interest

New in Box. Edwards Systems Technology Photoelectric Duct Smoke Sensor-Signature.

may have shelf wear

NEW / NEVER USED / IN ORIGINAL NEVER OPENED BOX Notifier FSD-751PL Duct Smoke Detector, Complete *Brand New*

NIB System Sensor D4120 with 36" sampling tube.

INNOVAIR FLEX SYSTEM SENSOR D4120 4-WIRE DUCT SMOKE DETECTOR BRAND NEW SHIPPING VIA USPS

This is a new item not in original package that has been on the shelf. It's a Fire Lite Innovair Model D350RPL Intelligent Duct Smoke Detector with extended air speed range and does not include sampling tubes just what you see. Perfect replacement part

I have 2 of these. Never installed.

I have 2 of these. Never installed.

What you see on pictures, that you will get!!! This item is BRAND NEW. This is the exact product you would see in a showroom, for less money!

SYSTEM SENSOR - Model #DH400ACDC - Smoke-Duct Detector This is new. The box it came in and the instructions are not included. It does have some discoloration.