arpadveress 
According to ISO 80079-37:2016 there is only one marking possible: Ex h for Ex non electrical devices.
Keep up good work!
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Dear Hazardous Area Industry Owner,
based on our meeting regarding Hazardous Area Compliance issues we can make
Ex assembly or invidually sourced items?
You are on site, and you do Ex detailed inspection. There are:
IEC 60079-0:2017 vs ISO 80079-36:2016
Although outside the scope of this standard, such equipment would typically be
risk assessment for Ex areas (what about drones?)
EN 1127-1 shall be the lead (relevant globally). it defines 13 possible
