Bosch D341P D341 Family four-wire duct smoke detector housings Duct detector kit 4-wire 24/120V 4.998.137.958

For 1 ft. (30.5 cm) to 10 ft. (3 m) ducts with air velocity between 300 ft./min. to 4000 ft./min. (1.52 m/s to 20.3 m/s) Easy duct tube installation through the housing cuts installation time Detector test and reset without removing covers Clear cover allows quick visual inspection Tube filters, dust immune smoke detector, and easy disassembly for cleaning reduce maintenance time and cost Current consumption (mA) 15 – 200 mA Material Plastic Operating relative humidity, non-condensing (%) 0 – 95 % Operating temperature (°C) 0 – 49 °C Operating voltage (VDC) 20 – 29 VDC Permissible air speed (m/s) 20.30 m/s