ATEX Directive 94/9/EC (Product Directive) concerning “equipment and protective systems intended for use in potentially explosive atmospheres”; is a total harmonization directive, i.e. its provisions replace existing divergent national and European legislation which cover the same subjects as stipulated by Directive 94/9/EC. As of 1st July 2003, all other relevant national regulations have been abolished and Directive 94/9/EC, as transposed into the national legislation of the Member States, is the sole legal instrument applicable. It is also considered new aspects not covered by Directives “old approach” as: non-electrical apparatus, combustible dusts and production surveillance. ATEX Directive 1999/92/EC (Social Directive) concerning “the minimum requirements for improving on the safety and health protection of workers potentially at risk from exposure to explosive atmospheres” is of concern to those which operating plant sites or involve hazardous areas. It came fully into force July 1st, 2003 and regulates all activities in areas at risk of explosion so far that had been framed into specific regulations, so the employer is subject to new obligations, also concerns the minimum conditions for the improvement of safety and health of workers potentially subject to risk connected to explosive.