BMT3S : Interior multi tones box (3 sounds) for bus and coach

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  • audible-signalling-drawing-boitier-bmt3s.jpg
  • audible-signalling-sign-unit-bmt3s.jpg
  • audible-signalling-drawing-boitier-bmt3s.jpg


Are you looking for a loundspeaker with 3 interior sounds to ensure safety in a passenger vehicle? Are you looking for a sound equipment with custom-made sounds and sound priorities? Are you looking for a speaker for bus or coach compliant to R118? Go for BMT3S!

BMT3S is a speaker imagined, designed and manufactured by SESALY, equipment’s manufacturer specialized in designing and assembling lighting and sound signaling solutions dedicated to buses and coach comfort and security. It is made in France and complies with CEM R10 04 regulation (electromagnetic compatibility) as well as with ECE R118 regulations (smoke fires).

Different sounds are available (ramp, door, stop requested) with the possibility to choose sounds priority orders. Please note, this product cannot be reprogrammed.

This customizable loudspeaker offers many benefits:

  • It requires a low consumption, only 1A. It functions with an operating voltage of 24Vdc. The consumption is 1A.
  • Its sound level is 100 dB (+/- 10db). *
  • It is easy to install owing to its angle bracket.
  • This loudspeaker is IP54 but it can reach IP65, optional on request.

* Depending on the version of the sound selected, the sound power may vary from 80dB to 110dB at 1 meter.

Download Technical Documentation

Technical datas

Voltage 24Vdc
Functions Different available sounds: ramp, door, stop requested, Non-reprogrammable product
Fixation With angle bracket
Sealing IP 54 waterproof loudspeaker - IP 65 Op on
Consumption 24 Vdc - 1 A
dB level 100 +/- 10 db