MEDC DB1 | Hazardous Area Sounder | ATEX Sounders Zone 1 & Zone 2 Weatherproof Ex d

MEDC DB1 Hazardous Area Sounder

MEDC DB1 Hazardous Area Sounders

MEDC DB1 | ATEX Sounders

Zone 1 & Zone 2 Hazardous areas

MEDC DB1 are part of range of lightweight, flameproof ATEX sounders that have been designed with a high weatherproof rating to cope with the harsh environmental conditions found offshore and onshore in the oil, gas and petrochemical industries – in ATEX & IECEx Zone 1 and Zone 2 hazardous areas. A wide range of hazardous area sounders are available to order from Thorne & Derrick, to suit individual requirements and applications.

The new electronic circuitry of the MEDC DB1 allows the DB1P and DB1HP hazardous area sounders to be switched between two selectable tones by either reversing the supply polarity, or connecting a second voltage supply. The higher output DB1H and DB1HP are particularly suitable for noisy environments, and can be ordered from Thorne & Derrick with MEDC call points for integration into fire detection systems in the explosive atmosphere industries.

A variety of sounder tones are available for MEDC sounders.

Stainless steel, one of the most durable materials available on the market, is both hard wearing and corrosion resistant, increasing the life of products in harsh environments and therefore reducing maintenance costs.

Contact Thorne & Derrick for great customer service, competitive quotations and availability from stock for the MEDC range of sounders, including MEDC DB1, for safe use in hazardous areas with Explosive Atmospheres.


MEDC DB1 | EX D Sounder

The MEDC DB1 hazardous area sounder is available in a choice of variants with Ex d and UL approvals.

  • DB1PBA ac version  (Ex d)
  • DB1PBS ac version  (Ex d)
  • DB1HPBA ac version  (Ex d)
  • DB1HPBS ac version  (Ex d)
  • DB1HPBA dc version  (Ex d)
  • DB1HPBS dc version  (Ex d)
  • DB1HPULA ac version (UL)
  • DB1HPULA dc version (UL)
  • DB1PBA dc version (Ex d)
  • DB1PBS dc version  (Ex d)
  • DB1PULA ac version (UL)
  • DB1PULA dc version (UL)


The MEDC range of sounders and beacons from the Crouse Hinds series of Signalling & Alarms – a comprehensive range of Explosion Proof call points are also available with ATEX & IECEx certification and explosion protection to both Ex d (flameproof) and Ex ia (Intrinsically Safe) applications.



Eaton MEDC DB1

Eaton MEDC DB1

ATEX Sounders Zone 1 & Zone 2


ATEX Certified & Approved


  • Zone 1 & 2 Hazardous Areas
  • UL listed for USA and Canada
  • – Hazardous Locations with Explosive Atmospheres
  • Class I, Div 1. Groups C & D.
  • Exd, IIB T3.
  • ATEX approved, Ex II 2G.
  • CENELEC approved, BASEEFA certified.
  • TR CU certified.
  • IP66 & IP67 Ingress Protection
  • Certified temperature:
    • –20°C to +70°C.
    • –13°F to +158°F.
  • Up to 113 dBA output.
  • Available in marine grade alloy or stainless steel.
  • 27 output tones, user selectable.
  • Telephone initiate option.
  • Tones can be selected remotely.
  • Tones comply with UKOOA/PFEER guidelines.
  • Any two tones may be switched via the external voltage supply.
  • End of line resistor option.
  • NFPA 72 compliant
Eaton MEDC DB1 Dimensions

Eaton MEDC DB1 – Dimensions

Eaton MEDC DB1 – Current Consumption

12Vdc 125mA 900mA
24Vdc 250mA 700mA
48Vdc 250mA 350mA
120Vdc 60mA 200mA
240Vdc 60mA 100mA

MEDC DB1 Hazardous Area sounders

Technical Specification

Should you require any further information to enable the selection or specification of explosion proof status lights, for use in potentially explosive atmospheres, please contact us.

Hazardous Area Certification
ATEX DB1P Ex d Cert. no. Bas03ATEX0463.
Certified to: EN60079-0, EN60079-1, EN60079-31.
Ex II 2GD, Ex d IIC T4/5/6 Gb, Ex tb IIIC T135/100/85°C Db, IP66/67
ATEX DB1HP Ex d Cert. no. IECEx BAS 13.0048
Certified to: IEC60079-0, IEC60079-1, IEC60079-31.
Ex d IIC T4/5/6 Gb, Ex tb IIIC T135/100/85°C Db, IP66/67
IECEx DB1P Ex d Cert. no. IECEx BAS 10.0065X
Certified to: IEC60079-0, IEC60079-1
Ex db IIB T6 Gb (Tamb. -20°C to +60°C)
IECEx DB1HP Ex d Cert. no. IECEx BAS 10.0064X
Certified to: IEC60079-0, IEC60079-1
Ex db IIB T5 Gb (Tamb. -20°C to +70°C)
UL Haz Locs Listing no. E187688
Class I, Div 1, Groups C & D
TR CU DB1P Ex d 1Ex d IIB T6 Gb
SIL SIL 1 certified to IEC61508. Cert number 20151119-4786827453 (DB1HP only
Material LM25 corrosion resistant alloy or ANC4B stainless steel with
stainless steel cover screws
ABS flare
Finish Epoxy paint finish as standard or to customer specification
Certified temp ATEX: –20ºC to +60ºC (DB1P)
ATEX: –20ºC to +70ºC (DB1HP)
UL: –25ºC to +70ºC
Weight DB1P: 3.5 Kg alloy, 8.3 Kg stainless
DB1HP: 5.6 Kg alloy, 12.7 Kg stainless
Ingress protection IP66
Entries Up to 3 x M25 or M20
Terminals Suitable to accept up to 4sqmm cable
Note: Terminals limited to 2.5sqmm cable on a.c. version with telephone initiate option only
Output Initiate voltage: 24 or 48Vdc
Max switching voltage: 250Vac
Max switching current: 10A
Labels Tag and duty labels optional
Tone selection Single Stage Unit a.c
27 user selectable tones including, PFEER/UKOOA tones
Two Stage Unit d.c
Switchable between any two of the 27 tones by either:
(i) Reversing the polarity of the supply, or
(ii) By a 3 wire common +ve system, switching between the two – ve lines
Note: Reverse monitoring is achievable on Two Stage Version by selection of terminals


The following code is designed to help in selection of the correct Eaton hazardous area sounders with ATEX approval and certification. Build up the part number by inserting the code for each component into the appropriate box.

Eaton MEDC DB1 - Ordering Requirements

Eaton MEDC DB1 – Ordering Requirements

ATEX IECEX Approvals

ATEX IECEX Approvals | International Hazardous Area Classifications & Approvals


Eaton MEDC have developed ATEX products, including ATEX Beacons, designed for harsh and hazardous area conditions and where there is a risk of explosion due to the presence of flammable gas and dust atmospheres both onshore and offshore – since 1975 MEDC have been designers and manufacturers of alarm, signal, control and communications equipment. T&D distribute the extensive range of Eaton MEDC products – this includes ATEX Certified manual call points, visual, audible alarms, loudspeakers and telephones for hazardous area workplaces, including Zone 1 & Zone 2 explosive atmospheres.

Eaton MEDC Beacons & Sounders

Thorne & Derrick, are the Explosive Atmosphere Experts, distributing an extensive range of ATEX Certified Equipment including heat tracing cables and systemselectrical heating productselectrical enclosures and plug/sockets outlets.

Complete range of LV-HV Cable Joints, Terminations, Cleats & Glands are available to support installation of power, control and instrumentation cables up to 33kV – includes Cold Shrink for use in hazardous areas to provide electrical insulation and cable protection.

➡ Cable Cleats | Cable Lugs | Cable Transits | Cable Joints

Data Sheets