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DB7 intrinsically safe sounder / horn for hazardous areas

This range of ruggedised, intrinsically safe and weatherproof sounders, intended for use in potentially explosive atmospheres, has been designed with high ingress protection to cope with the harsh environmental conditions found offshore and onshore in the oil, gas and petrochemical industries.

The unit is available in 12V and 24V versions and for gas groups IIB or IIC.

A lower cost, uncertified version is available for use in non-explosive atmospheres.

Listen to available sounder tones for this product

Data Sheets
DB7 (374 KB) (PDF)
Product Certificates
ATEX Ex ia IIB & IIC (222 KB) (PDF)
Schematics / Wiring
Ex ia Schematic (48 KB) (PDF)
Wiring (212-121) (44 KB) (PDF)
Technical Manuals
ATEX (TM133) (49 KB) (PDF)
Certification ATEX, TR CU
Intrinsically Safe ATEX Ex II 1G, Exia IIB/IIC T4
Area Classification Zones 0, 1, 2 and safe area use.
Certified Ambient Temperature -55°C to +70°C
Ingress Protection IP66 & 67
Material Corrosion-free GRP
Entries Up to 3 x 20mm via knockouts
Weight 1.0kg
No. of Tones 27
Options Certification, body colour, duty & tag labels,
voltages 12V-24V d.c.



  • Zones 0, 1, 2 and safe area use.
  • Exia IIB/IIC T4.
  • ATEX approved Ex II 1G.
  • Weatherproof uncertified version.
  • BASEEFA certified.
  • TR CU certified.
  • IP66 & IP67.
  • Certified temperature: –55°C to +70°C.
  • Corrosion resistant red painted GRP.
  • Up to 110 dB(A) output.
  • 27 tones, user selectable.
  • Tones comply with UKOOA/PFEER guidelines.
  • Any two tones may be switched by the external voltage supply.
  • Retained stainless steel cover screws.