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Sounders / Horns
MEDC DB3B Sounder


Availability: Enquire about stock

Up to 125dB, Ex d(e), Weatherproof

POA excl. VAT

MEDC DB3B Details

The DB3B is a high power explosion proof sounder, introduced as a replacement for the current DB3 with improved functionality and performance. Certified for use in a wide range of temperatures from -55ºC to +70ºC, the Ex enclosure is manufactured from GRP with a rugged thermoplastic flare providing a corrosion free and aesthetically pleasing product. Capable of producing 125dB @ 1m and with a range of pre-recorded tones, the DB3B includes an integral volume control which is ideal when a lower output is required.

The unit is provided with versatile control options allowing compatibility with a wide range of control methods and PLCs. The standard DC unit provides 3 tone stages, each stage has 28 tones available which can be independently selected. The unit can be controlled by reversing the polarity of the power supply (2 stage) or providing a common negative and switching between multiple positive supplies. The DB3B proves its versatility by additionally being able to work with a common positive supply and switching the negatives. The tone stages of the DB3B can also be controlled via voltage free contacts provided by a control panel.

The flexibility of the range continues with a wide range of supply voltages. The short flare option is worthy addition to the range offering a high SPL in a compact unit.


  • Ex d / Ex de IIC/IIIC T4/T5/T6.
  • ATEX certified.
  • IECEx certified.
  • Certified temperature -55ºC to +70ºC.*
  • IP66 & IP67.
  • Optional Ex e terminal chamber.
  • Up to 125dB output @ 1m.
  • Integral volume control.
  • 28 tones, user selectable.
  • 3 stage unit remotely switchable.
  • Tones can be programmed to customer's
  • specification.
  • DC supply voltage between 12V and 48V.
  • End of line resistor option.
  • Sounder & beacon combination units available,
  • for further details contact MEDC.
  • Ex enclosure - Glass reinforced polyester.
  • Flare - High impact thermoplastic polyester.
  • Stainless Steel mounting bracket and cover screws.
  • Mounting bracket has ratchet facility as standard.Optional swivel bracket available
CertificationATEX, IECEx,
Area ClassificationZone 1, Zone 2 and non-Ex use.
Certified Ambient Temperature-55°C to +70°C
Ingress ProtectionIP66 & IP67
MaterialEx enclosure - Flame retardent, UV stable Glass Reinforced Polyester

Flare - Flame retardent, UV stable thermoplastic polyester


Up to 2 x M20 or 1/2" NPT. Blanking plug available.

WeightEx d - 4.6kg, Ex de - 5.4kg (based on long flare unit)
No. of Tones28 user selectable tones
OptionsBody colour, short flare, tag & duty labels, custom tones 

EOL resistor, certification, suitable for Gas or Gas and Dust,  Ex atmospheres, terminal chamber, 

voltage free activation, voltages 12V-48V d.c., 110V-254V a.c

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Sounders / Horns