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Up to 25 Watts Exd(e), Weatherproof

POA excl. VAT

MEDC DB4 Details

This range of loudspeakers, intended for use in potentially explosive gas and dust atmospheres, has a power rating of up to 25 watts and is suitable for use in all gas groups including hydrogen.

The flamepaths, flare and the body, are manufactured completely from a UV stable glass reinforced polyester. Stainless steel screws and sinter are incorporated thus ensuring a corrosion free product. A tapered flamepath is used to overcome the problems of assembly of parallel spigot flamepaths.

An optional Exe terminal chamber is available.

An uncertified version is available for use in non-explosive atmospheres.

Models compliant to BS 5839, part 8 are available.


  • Zone 1, Zone 2 & non-Ex use.
  • UL listed for USA and Canada:
  • Class I, Div 2, Groups A-D.
  • Class II, Div 2, Groups F & G.
  • Class I, Zones 1 & 2, AExd IIC, T5.
  • Exd IIC T4/T5.
  • ATEX approved, Ex II 2GD.
  • BASEEFA certified.
  • GOST ‘R’ & ‘K’ certified.
  • Brazilian (Inmetro) certified.
  • Optional Exe terminal chamber.
  • IP66, IP67, NEMA 4x & 6.
  • Certified temperature:
  • –55°C to +70°C*.
  • –67°F to +158°F*.
  • GRP corrosion-free flamepaths.
  • 119dBA at 25 watts at 1 metre.
  • 8, 15, 20 and 25 watt versions.
  • BS 5839, part 8 compliant versions available.
  • Addressable capability.
  • Power tappings, via integral transformer.
  • Ratcheted swivel bracket.
  • Stainless steel sinter.
  • Stainless steel mounting bracket.
  • Tapered flamepath.
  • Line and 8Ω versions available.

*Depending on version.

CertificationATEX, IECEx, UL, GOST R & K, Inmetro, SIL 2
FlameproofATEX Ex II 2GD, EExd(e) IIC T4/T5
Area ClassificationZone 1, Zone 2 & non-Ex use.
Ambient Operating Temperature-55°C to +70°C (low temp unit)

-20°C to +70°C (standard)

Ingress ProtectionIP66 & IP67
MaterialCorrosion-free GRP
Output107 dBA at 1W at 1 metre
 119 dBA at 25W at 1 metre
EntriesUp to 2 x 20mm
Weight5kg (approx.)
Tappings25, 12.5, 6, 4, 2, 1 (at 25W)
OptionsPower (8W, 15W, 20W, 25W), body colour,

Tag & duty labels, certification,

BS5839, part 8 compliance,

Terminal chamber, transformer voltage

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