MEDC dEV 20 | Hazardous Area Sounder | ATEX Sounders Zone 1 & Zone 2 Ex de

MEDC dEv 20 Hazardous Area Sounder

MEDC dEv 20 Hazardous Area Sounder



MEDC dEV 20 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.

Hazardous areas often require the use of acoustical signals for warning or information purposes. The ExII dEV 20 sounders from MEDC offer both of these signalling features and are designed for continuous operation.

The ExII-sounder dEV 20 has an ingress protection rating of IP66, meaning it is suitable for both indoor and outdoor installation in ATEX & IECEx hazardous locations, and can be ordered from Thorne & Derrick with MEDC call points for integration into fire detection systems in the explosive atmosphere industries.

These hazardous area sounders consist of a flame-proof housing manufactured from a light grade aluminium alloy and a sound channel made from impact-resistant polyester.

The MEDC dEV 20 includes two signal levels. The signal tone for the first level is adjusted with the slide switches 1-5 (S0) according to the signal choice list. The signal tone for the second signal level is adjusted with the slide switches 6-10 (S1).

Contact Thorne & Derrick for great customer service, competitive quotations and availability from stock for the MEDC range of sounders, including MEDC dEV 20, for safe use in hazardous areas with Explosive Atmospheres.


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 dEV 20

Eaton MEDC dEV 20

ATEX Sounders Zone 1 & Zone 2


ATEX Certified & Approved


  • Zone 1 & 2 Hazardous Areas
  • Sound pressure level: up to 115 dB(A)
  • 32 signal tones, 2-stage alarm
  • Volume adjustable (3 steps of 10 dB)
  • Aluminium housing, Polyamide
  • ATEX Certified & Approved
  • IP66 & IP67 Ingress Protection
  • II 2 G Ex d e IIB + H2 T6 Gb
  • II 2 D Ex tb IIIC T85ºC Db
Eaton MEDC dEV 20 Dimensions

Eaton MEDC dEV 20 -Dimensions

MEDC dEV 20 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.

Type of protection ATEX Cert. No. PTB 12 ATEX 1014.
II 2 G Ex d e IIB + H2 T6 Gb.
II 2 D Ex tb IIIC T85ºC Db.
IECEx Cert. No. IECEx PTB 13.0012
Ex d e IIB + H2 T6 Gb
Ex tb IIIC T85ºC Db
Protection class I
Certified temp T6: -50ºC to +60ºC
Housing Seawater resistant Aluminium, sound protection hood
Polyamide (black).
Weight 2.8 kg
IP rating IP66
Cable entries M20 x 1.5 (cable 5.5 to 13 mm)
Signal selection By DIP switches
Volume Max. 115 dB(A) reducible in 3 levels each by 10 dB
Signal tone 32 for each signal level
Current consumption 93 – 460mA (dep. on voltage variation)
Power consumption Max. 14 W
Clamping capacity To 2.5sqmm
Dimensions ~ Ø 144 x 345 mm

Eaton MEDC dEV 20 – Ordering Requirements

Eaton MEDC  Product Voltage Current Consumption Eaton MEDC Part Number
dEV20 Ex-Sounder 24 VDC 460 mA F215 910 13
dEV20 Ex-Sounder 85 – 265 VAC 93 mA (230 V) F215 910 07


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