d4120 for sale, brand-new and used.

System Sensor D4120 Innovair Flex HVAC Duct Smoke Detector 4-Wire New 4-Wire Photoelectric

Brand New still in the box! Innovair Flex System Sensor model # D4120 4-Wire Duct Smoke Detector

System Sensor D4120 Innovair Flex 4 Wire Duct Smoke detector. NEW

Brand new, never used. Opened to take pictures. 

New in box, never used. Only opened box to take pictures. All sales are final.

This System Sensor model D4120 4-wire duct smoke detector is manufacturer refurbished.

Attention The 1st one sold WILL include the plastic cover, if quantity 1 shows than there is NOT a plastic cover. You will be purchasing a System Sensor Smoke Detector for Duct Application. Model No.

plugin sensor head provides improved false alarm immunity and simple testing, maintenance, and installation. The System Sensor D4120 4Wire Photoelectric LowFlow Duct Smoke Detector features an improved cover design that isolates the sensor head from the lowflow features to offer simple maintenance. The InnovairFlex housing provides ample wiring space, a 3/4inch conduit knockout, and builtin short circuit protection to prevent damage to sensitive components during installation.

System Sensor 4 Wire Duct Smoke Detector D4120 No International Shipping

System sensor d4120 duct detector, out of original package

System Sensor Duct Detector D4120 4 Wire Duct Detector Brand New in Box - Overstock from Project