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DB4

DB4 explosionproof horn loudspeaker for hazardous areas

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.

Download DB4 datasheet
Download DB4 North American datasheet
Data Sheets
DB4 (142 KB) (PDF)
DB4 North American (114 KB) (PDF)
Product Certificates
ATEX Exd IIC (1 MB) (PDF)
ATEX Exde IIC (944 KB) (PDF)
UL (569 KB) (PDF)
GOST R Exd, Exde IIC (568 KB) (PDF)
GOST K Exd IIC (399 KB) (PDF)
CQST Exd IIC (562 KB) (PDF)
VNIIPO (881 KB) (PDF)
Product Certificates – External Link
ABS Exde IIC
Schematics / Wiring
Exd, Exde Schematic (200 KB) (PDF)
UL Schematic (212 KB) (PDF)
Wiring (199-315) (106 KB) (PDF)
Technical Manuals
Exd, Exde & SIL 2 (TM143) (2 MB) (PDF)
UL & SIL2 (TM105) (3 MB) (PDF)
Certification ATEX, UL, GOST R & K, Inmetro
Flameproof ATEX Ex II 2GD, Exd(e) IIC T4/T5
Ambient Operating Temperature

-55°C to +70°C (low temp unit)

-20°C to +70°C (standard)
Ingress Protection IP66 & IP67
Material Corrosion-free GRP
Output 107 dBA at 1W at 1 metre
  119 dBA at 25W at 1 metre
Entries Up to 2 x 20mm
Weight 5kg
Tappings 25, 12.5, 6, 4, 2, 1
Options Power (8W, 15W, 20W, 25W), body colour,
  Tag & duty labels, certification,
  BS5839, part 8 compliance,
  Terminal chamber, transformer voltage

 

Features

  • Zone 1, Zone 2 & non-Ex use.
  • UL listed for USA and Canada:
    • Class I, Div 2, Groups A-D.
    • Class I, Zones 1 & 2, AExd IIC, T4.
  • Exd IIC T4/T5.
  • ATEX approved, Ex II 2GD.
  • BASEEFA certified.
  • GOST ‘R’ & ‘K’ certified.
  • Australian (SAA) 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.