Product Details
The Edwards fire alarm bells are diode polarized, vibrating bells designed specifically for use with fire alarm control equipment, available in 6" (152 mm), 8" (203 mm), and 7" (254 mm) gong sizes. These bells feature a heavy-duty die cast housing and a rugged, compact mechanism, rated for outdoor use with an optional back box. The gongs are crafted from select alloy steel to produce the loud, resonant tone required in fire alarm systems and are epoxy powder coated red for durability. The supplied mounting plate allows for installation directly on surfaces or on any single gang box, as well as on any 3 1/2" (89 mm) or 4" (102 mm) octagon, or 4" (102 mm) square electrical box. For outdoor installation, the use of Edwards Cat No. 449 weatherproof back box is recommended. The 438D and 439D models are audible signaling appliances designed for installations that operate in conjunction with an installed fire alarm panel and detection devices.
