The NOHMI’s fire alarm bell provides a higher level of sound with a high efficiency and a lower level of RFI noise.

FBM023 and FBW013-EA fire alarm bells are not compatible with the Automatic Testing Function(ATF) of the NOHMI analog addressable fire alarm system, since these alarm bells are not polarized.

FBM023-D and FBM023Z-D bells are compatible with both NOHMI ATF analog addressable and conventional fire alarm systems.

It is recommended that fire alarm bells are installed so that the sound level at any place is higher than 65 dB or higher than 6 dB plus the ambient sound level.