The 4098-9756 is a 4-Wire Duct Sensor supplied with the 4098-9714 Photo Smoke Sensor. Compatible with Simplex fire alarm control panel models 4010, 4020, 4100, and 4120. Additional Replacement Duct Detector Boards (565-925) 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