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This range of loudspeakers, intended for use in potentially explosive gas and dust atmospheres, has a power rating of up to 30 Watts and is suitable for use in the harsh environmental conditions found offshore and onshore in the oil, gas and petrochemical industries.

With an integral increased safety chamber, for termination, this unit offers both high output and easy installation.

In addition, the 25 Watt version still offers superior output with a higher ambient certified temperature (+65°C).

The flamepaths, flare and body, are manufactured from a UV stable glass reinforced polyester. Stainless steel screws and mounting stirrup are incorporated to ensure a corrosion-free product.

Data Sheets
DB16 (671 KB) (PDF)
DB16 North American (388 KB) (PDF)
Product Certificates
ATEX Exde IIB (1 MB) (PDF)
Download file (1 MB) (PDF)
TR CU (1008 KB) (PDF)
Inmetro Exd(e) IIB (775 KB) (PDF)
UL (215 KB) (PDF)
Product Certificates – External Link
Schematics / Wiring
DB16 (286-114) (63 KB) (PDF)
DB16UL (286-118) (79 KB) (PDF)
Wiring (48 KB) (PDF)
Technical Manuals
DB16 UL (TM180) (77 KB) (PDF)
Certification ATEX, IECEx, UL, CUTR, Inmetro
Explosion Protection ATEX Ex II 2G, Exde IIB T3
ATEX Ex II 2GD, Exde IIC T110°C
Area Classification Zone 1, Zone 2 & non-Ex use.
Certified Ambient Temperature -50°C to +65°C (25W)
  -50°C to +40°C (30W)
Ingress Protection IP66 & IP67
Material Corrosion-free GRP
Output (IBB Version) 1W/1m is 110dBA
  25W/1m is 121dBA
  30W/1m is 122dBA
Output (ICC Version) 3dBA less than IIB versions
  See data sheet for additional output
Entries Up to 2 x 20mm or 2 x 25mm
Weight 5.5kg
Tappings @ 30 Watts 30, 25, 12, 6, 4, 2
Options Body colour, 30W or 25W, transformer, tag & duty labels.



  • Zone 1, Zone 2 & non-Ex use.
  • UL listed for USA and Canada
    • Hazardous locations:
    • Class I, Div 2, Groups A-D*
    • Class I, Zone 1, AExde IIB/IIC T3/T4*
    • Ordinary locations: Signalling Speaker
  • Exde IIB/IIC, T3/T4*.
  • ATEX approved, Ex II 2G/Ex II 2GD*.
  • IECEx apprived Gb, Db.
  • BASEEFA certified.
  • CUTR certified.
  • Brazilian (Inmetro) certified.
  • IP66, IP67, NEMA 4x & 6.
  • Certified temperature:
    • –50°C to +65°C*.
    • –67°F to +104°F*.
  • GRP corrosion-free flamepath.
  • Up to 122dBA at 30 Watts at 1 metre*.
  • Up to 112dBA at 30 Watts at 10 feet*.
  • 25 and 30 Watt versions.
  • Power tappings via integral transformer.
  • Ratcheted swivel mounting stirrup.
  • Stainless steel fixtures.
  • 100V line or 8Ω

*Model dependent