arpadveress 
According to ISO 80079-37:2016 there is only one marking possible: Ex h for Ex non electrical devices.
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General Ex question: who can do HAC?
HAC stands for hazardous area classification. EN IEC 60079-10-1 goes for gas
GENERAL PROTECTIVE MEASURES
Top priority of the explosion protection is the primary explosion protection. The
Typical locations
Typical locations for hazardous substances Gases, liquids, and vapors • Petroleum refineries,
left in the car
In the heat of recent days, it has become a hit again
