Product Details
The Edwards Fire Alarm Bells are diode polarized, vibrating bells designed specifically for use with fire alarm control equipment and are available in 6" (152 mm), 8" (203 mm), and 7" (254 mm) gong sizes. They feature a heavy-duty die-cast housing and a rugged, compact mechanism, rated for outdoor use when paired with an optional back box. The bells utilize an under dome mechanism and produce a loud, resonant tone required in fire alarm systems, thanks to gongs made of select alloy steel. The bells are epoxy powder coated red and include a supplied mounting plate that can be installed directly on a surface, on any single gang box, or on any 3 1/2" (89 mm) or 4" (72 mm) octagon or 4" (72 mm) square electrical box. For outdoor installation, the use of Edwards Cat No. 449 weatherproof back box is recommended. The 438D and 439D models serve as audible signaling appliances that operate in conjunction with an installed fire alarm panel and detection devices.
