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 outputs are up to 117dB(A) at 1 meter 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 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 the 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 12 Vdc; 24 Vdc; 48 Vdc
Voltages AC 115 Vac; 230 Vac
Stage Switching Negative or Positive
Ingress Protection S110D : IP66/67 S110E : IP66
Housing Material Marine-Grade Copper Free LM6 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