Features:
- 6" (152 mm), 8" (203 mm) and 7" (254 mm) gong sizes
- Heavy duty die cast housing
- Rugged, compact mechanism
- Rated for outdoor use with optional back box
- Under dome mechanism
- The Edwards Fire Alarm Bells are diode polarized, vibrating bells designed for use with fire alarm control equipment.
- Gongs are made of select, alloy steel to sound the loud, resonant tone required in fire alarm systems.
- Epoxy powder coated red.
- Supplied mounting plate installs directly on surface or on any single gang box, or on any 3 1/2" (89mm) or 4" (72mm) octagon, or 4" (72mm) square electrical box.
- For outdoor installation, use Edwards Cat No. 449 weatherproof back box.
- The 438D and 439D fire alarm bells are audible signaling appliances for installations that operate in conjunction with an installed fire alarm panel and detection devices