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The D4120, 4-wire photoelectric duct smoke detector features a pivoting housing that fits, and mounts to, both square and rectangular footprints.The D4120  senses smoke in
the most challenging conditions, operating in airflow speeds from 100 to 4,000 feet per minute, temperatures of –4°F to 158°F, and a humidity range of 0 to 95 percent (non-condensing)

InnovairFlex Series D4120 Duct Smoke Detector

The D4120, 4-wire photoelectric duct smoke detector features a pivoting housing that fits, and mounts to, both square and rectangular footprints.The D4120 senses smoke in the most challenging conditions, operating in airflow speeds from 100 to 4,000 feet per minute, temperatures of –4°F to 158°F, and a humidity range of 0 to 95 percent (non-condensing)

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