System Sensor® Duct Smoke Detector, 24 VAC Power Source, 0 to 95% Humidity, -4 to 158 deg F Operating, 14.38 in L x 5 in W x 2.5 in D Rectangular/7.75 in L x 9 in W x 2.5 in D Square Dimensions

System Sensor® Duct Smoke Detector, 24 VAC Power Source, 0 to 95% Humidity, -4 to 158 deg F Operating, 14.38 in L x 5 in W x 2.5 in D Rectangular/7.75 in L x 9 in W x 2.5 in D Square Dimensions

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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 4000 ft/min, temperatures of -4 to 158 deg F, and a humidity range of 0 to 95% (non-condensing). A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance. An improved cover design isolates the sensor head from the low-flow feature for simple maintenance.