Duct Smoke Detector, Photoelectric, Watertight, Finish White, Duct Mounting, Alarm Current 100mA, Peak Output (dBA) -, Flash (Candela) -, Standby Current (uA) -, Depth (In.) 2 1/2 in, Height (In.) -, Length (In.) 14 3/8 in, Width (In.) 5 1/2 in, Duct Opening -, Duct Width (Ft.) -, Ambient Temp. Limits (F) -4 Degrees to 158 Degrees F, Coverage (Square-Ft.) -, Air Velocity (FPM) 100 to 4000 fpm, Alarm Aux. Contact @ 250V -, Alarm Aux. Contact @ 30VDC 10 A, Alarm State (mA) –
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