duct smoke detector for sale, brand-new and used.

works fine

System Sensor 4 Wire Duct Smoke Detector D4120 No International Shipping

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

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

See condition

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.

New/Open Box. Simplex 4098-9756 Duct sensor 4 wire smoke detector. Item has some light scuffs on face plastic.

FIRE LITE by HONEYWELL D355PL DUCT SMOKE DETECTOR BRAND NEW IN ORIGINAL FACTORY BOX---BOX HAS SHELF WEAR & SOME SURFACE TEARS IN CARDBOARD FIRE LITE by HONEYWELL MODEL NO: D355PL

NEW System Sensor DH100ACDCLP Duct Smoke Detector Brand New Pull from a New Unit Delivery - Never Used but doesn't come with a box Free Shipping to Lower US States