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dEV 20

dEV 20

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

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

Data Sheets
dEV20 (307 KB) (PDF)
Product Certificates – External Link
Technical Manuals
Technical Manual (723 KB) (PDF)


Certification ATEX, IECEx
Protection Class II 2 G Ex d e IIB + H2 T6 Gb.
II 2 D Ex tb IIIC T85ºC Db.
Certified Ambient Temperature -50°C to +60°C
Ingress Protection IP66
Material Alluminium
Entries M20 x 1.5 (cable 5.5 to 13 mm).
Weight 2.8kg
Options Voltage



• 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