ATEX
ATEX (ATmosphères EXplosibles) is an EU product directive (2014/34/EU) that defines the minimum requirements for devices and protective systems in potentially explosive atmospheres. The directive ensures occupational health and safety in hazardous areas, in accordance with EN 60079 standards.
A distinction is made between:
ATEX Product Directive 2014/34/EU: Regulations for manufacturers of explosion-protected devices
ATEX Operating Directive 1999/92/EC: Regulations for system operators.
All products intended for use in potentially explosive atmospheres must fulfil these ATEX requirements before being placed on the EU market.
More about the guidelines here