CE marking is an indicator that a product complies with EU legislation and enables the free movement of products within the European market. Not all products must bear the CE marking, only those product categories subject to specific directives (New Approach Directives) are required to be CE marked.
Harmonised European standards are issued with reference to the applied directives and express in detailed technical terms the essential requirements. Compliance of a product with the harmonised standards gives a product the “presumption of conformity” with the relevant essential requirements. The use of harmonised standards is voluntary, but it remains the easiest way to comply with the requirements for CE-marking. Other ways to fulfil the essential requirements can be chosen.