All we know hazardous area classification is a must have.
Question to here: how you mark the Ex zone?
- ATEX says Ex mark shall be displayed?!
- painting on floor?
- signs?
- warnings?
- zone map in the hand?
Remarks:
- Ex only does not say which group and T class, so not easy to identify if the installation is good or not (meeting the EPL requirements)

Recommendation: besides the Ex mark E.g Zone 1 IIB T4 to display, and then all easy to follow up.
Keep up good work!
Arpad
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