Simplex 4098-9755 TrueAlarm Analog Addressable Duct Sampling Unit

The Simplex 4098-9755 TrueAlarm Analog Addressable Duct Sampling Unit detects the presence of smoke in air conditioning or ventilation ducts. This product is for use with Simplex addressable fire alarm control panels. Sampling tubes are installed into the duct. Air is directed to a 4098-9714EA TrueAlarm Photoelectric Smoke Detector mounted in the housing. Additional Replacement Duct Detector Boards (565-831) sold separately. SAMPLING TUBES (sold separately) —12” (305 mm) 4098-9854 1/2” (12.7 mm) longer than duct width —13” to 23” (330 mm to 584 mm) 4098-9855 1/2” (12.7 mm) longer than duct width —24” to 46” (610 mm to 1168 mm) 4098-9856 3 in” (76 mm) longer than duct width —46” to 71” (1168 mm to 1803 mm) 4098-9857 3 in” (76 mm) longer than duct width —71” to 95” (1803 mm to 2413 mm) 4098-9858 3 in” (76 mm) longer than duct width