duct detector for sale, brand-new and used.

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.

New duct smoke detector.

nnovair Low Flow Duct Smoke Detector DH100ACDCLPInstalled on a project then Removed due to location eleminate - please see images for more details.

works fine

System Sensor 4 Wire Duct Smoke Detector D4120 No International Shipping

System sensor d4120 duct detector, out of original package

Brand new, never installed. Been sitting awhile. Free shipping.

System Sensor Duct Detector D4120W Watertight 4 Wire Duct Detector Brand New in Box - Overstock from Project

1 year free replacement warranty. Analog sensitivity values within 1% of a New Detector. Used TFX 912PD Analog Addressable Duct Smoke Detector Housing + Head.

FIREXDUCT SMOKE DETECTORIONIZATIONMODEL 2650-550USEDWORKING CONDITION

Firex 543 remote accessory for duct smoke detector New. Old stock. With instructions.

See condition

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This is a brand new Johnson Controls Innovair 2-Wire Intelligent Photoelectric Low Flow Duct Smoke Detector, model DH300PLA. 24VDC. Includes original box, accessories and information / installation sheet.

Fantastic find from the estate of a retiring heat and air contractor. Item came right off the shelves of the parts department. Item or box may show signs of shelf wear, but item is NEW.

The SuperDuct Conventional Two-Wire Smoke Detector detects the presence of smoke in a building's HVAC system under extended temperature ranges. Its primary purpose is to provide early warning of an impending fire and to prevent smoke from circulating throughout the building.

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