Simplex 4904-9178 Visible Notification Appliance Wall-Mount SF 22/01 Additional Replacement Duct Detector Boards

Additional Replacement Duct Detector Boards (565-925) sold separately

and is used to indicate a fault condition

high quality Photoelectric Smoke Detectors

Detector Tester Calibration Kit

Simplex 4904-9178 Visible Notification Appliance Wall-Mount SF 22/01 Additional Replacement Duct Detector BoardsSimplex 4904 Series wall mount visible notification appliances provide symmetrical light output in key axis directions by utilizing a compound, multi surface reflector. The lens assembly fits securely into its housing, providing a high integrity notification appliance that is impact and vandal resistant and suitable for a variety of applications.