MEDC dEV 20 Sounder


Ex de sounder – up to 115 dB(A)

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Explosion-proof Sounder dEV20 – Up to 115 dB(A)

Hazardous areas often require the use of acoustical signals for warning or information purposes. The ExII-sounder dEV20 offers both of these signalling features and is designed for continuous operation.

The ExII-sounder dEV20 has an ingress protection rating of IP66, meaning it is suitable for both indoor and outdoor installation.

The ExII-Sounder consists of a flame-proof housing manufactured from a light grade aluminium alloy and a sound channel made from impact-resistant polyester.

The sounder dEV20 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).

Delivery condition: S0 = Tone 24 , S1 = Tone 4


  • 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 Approval
  • IP66
  • II 2 G Ex d e IIB + H2 T6 Gb
  • II 2 D Ex tb IIIC T85ºC Db
Technical Specification
CertificationATEX, TR CU
Intrinsically SafeATEX Ex II 1G, Exia IIB/IIC T4
Area ClassificationZones 0, 1, 2 and safe area use.
Certified Ambient Temperature-55°C to +70°C
Ingress ProtectionIP66 & 67
MaterialCorrosion-free GRP
EntriesUp to 3 x 20mm via knockouts
No. of Tones27
OptionsCertification, body colour, duty & tag labels,
voltages 12V-24V d.c.

MEDC dEV 20 Sounder Datasheet