Simplex 4904-9178 Visible Notification Appliance Wall-Mount SF 22/01 Models are available for surface

Models are available for surface mounting to Wheelock weatherproof backboxes on walls or ceilings

high quality Photoelectric Smoke Detectors

which can support 159 SK detectors and 159 SK modules

They connect to the control panel via the RS-485 SBus

and is used to indicate a fault condition

Simplex 4904-9178 Visible Notification Appliance Wall-Mount SF 22/01 Models are available for surfaceSimplex 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.