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

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

without overloading the main panel

The dual function of this single device makes it ideal for installations such as hotels

They fit into a standard 4‐inch square or double‐gang electrical back box

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.