Edwards 438D & 439D Series Catalog Page (Audible Signal Page)

Bells and 439 Series 438 and 439 Series fire alarm bells are polarized vibrating bells for use with fire equipment They operate in conjunction an installed fire alarm panel and detection The steel alloy gongs are epoxy powder and produce a loud resonant tone in fire alarm systems and Specifications 6 8 and 10 gong sizes Heavy Steel Back applications Under Available Lead Information No AC AC AC AC AC AC DC DC DC DC DC DC DC DC A A A A A A A A A A A A A A Chamber Back Box for DC Bells No at 1m 10ft dB and 439 Series and Dimensions No Size Net lb Shipping lb Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing Drawing 9 16 1 2 254mm 203mm 152mm No 449 Box plate furnished directly on surface any single gang open 29 32 11 32 15 32 1 16 1 2 5 8