Cranford Controls

BEx Flameproof Sounders

Product Overview

The flameproof BExS110 alarm sounders are suitable for Zone 1 & Zone 2 applications and the BExDS110 sounders also for Zone 21 & 22.

Sound level ouputs are up to 117dB(A) at 1 metre with a choice of 32 alarm tones and 3 remotely selectable stages. The BEx range features enclosures manufactured from corrosion proof, marine grade copper free LM6 aluminium which is phosphated and powder coated.

The re-entrant flare horns are high impact, fire retardant ABS. All models have two M20 cable entries, large termination areas containing in & out terminals (Ex de version only) and an ingress protection of IP66/67 (Ex d) and IP66 (Ex de). For fire applications the BExS110D 24V dc siren is CPD EN89/106/EEC compliant (EN54-3 tested).


  • Automatic synchronisation on multi-sounder system.
  • Very large termination area.
  • Ratchet adjustable stainless steel ‘U’ bracket.
  • IN & OUT terminals (Ex de version only).
  • ‘Programmable’ version available:
    – 45 alarm tones
    – 4 remotely selectable stages
    – Any tone can be assigned to any stage
    – User configurable continuous frequency tone


Maximum output 117dB(A) @ 1 metre
Nominal output 110dB(A) @ 1m +/- 3dB – Tone 2
No. of tones 32 (UKOOA / PFEER compliant)
No. of stages 3
Volume control Max. 110dB(A);Min. 72dB(A) – Tone 2
Effective range 100m @ 1KHz
Voltages DC 12vdc; 24vdc; 48vdc
Voltages AC 115vac; 230vac
Stage switching Negative or positive
Ingress protection S110D : IP66/67 S110E : IP66
 Housing material Marine grade copper freeLM6 Aluminium
Housing finish Phosphated & powder coated Finish – anti-corrosion

*For further product details, please refer to the Product Data Sheet

Part Numbers

306-001 BExS110D sounder, red body