duct air flow sensor for sale, brand-new and used.

this was an overstock item. this item is out of original factory warranty. Has been sitting in stock.

4-wire photoelectric low-flow duct smoke detector The InnovairFlex™ Series are the only duct smoke detectors flexible enough to fit configurations from square to rectangular and everything in between. The InnovairFlex D4120 4-wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. This unit senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 feet pe

Brand new  D355PL Detector Fire-Lite's InnovairFlex D355PL n

Photoelectric, integrated low-flow technology. • Air velocity rating from 100 ft/min to 4,000 ft/min (0.5 m/s to 20.32 m/sec). • Versatile mounting options: square or rectangular configuration.

You are bidding on one Hy Cal Sensing Products HHT-2SC-NTN Humidity Transmitter 0-100% space humidity transmitter, 2% accuracy, 4-20 m.a. output, no temperature section. This item was removed under working conditions during a tenant improvement.

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System Sensor DNR Innovairflex Intelligent Non-Relay Duct Smoke Detector Photoelectric, integrated low-flow technology (detector head sold separately) Air velocity rating from 100 ft/min to 4,000 ft/min Adjusts to square and rectangular mounting configurations

Brand new in box opened for pictures