The flameproof BExS120 alarm sounders are suitable for Zone 1 and Zone 2 applications and the BExDS120 sounders also for Zone 21 and 22. Sound level ouputs are up to 123dB(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 and out terminals (Ex de version only) and an ingress protection of IP66/67 (Ex d) and IP66 (Ex de). For fire applications the BExS120D 24V dc siren is CPD EN89/106/EEC compliant (EN54-3 tested).