6. Standardization and certification

6.1 Electrical certification

When a gas detector (flammable, oxygen or toxic) is intended for use in a potentially explosive atmosphere (ATEX), it is subject to the general construction rules for electrical equipment operating in ATEX in accordance with Directive 2014/34/EU, transposed into French law by Decree no. 2015-799 of 1 ^er July 2015.

For equipment intended for use in the surface industry (Group II equipment), Directive 2014/34/EU defines 3 categories according to the level of protection which are linked to the possible area of use:

• normal protection level: category 3 for use in zone 2 only ;

• high level of protection: category...