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We act as an international, independent conformity assessment body accredited for testing, certification and inspection services



CESI proves its competence as an independent testing service provider also by its accreditation certificates in accordance with ISO/IEC 17025.

Within the frame of ISO/IEC 17025, CESI is also a founder member of STL (Short-Circuit Testing Liaison).




CESI is a well recognised Product Certification Body according to ISO/IEC 17020 standard within the sectors of low and high voltage electrical apparatuses and components.

CESI is Notified Body for the application of all modules of the Directive 2014/34/EU (ATEX) covering​ all electrical and mechanical equipment working in a potentially explosive atmosphere. In this context, CESI is also a Certification Body and a Testing Laboratory in accordance with the IECEx Scheme. 


CESI acts as Type "A" Inspection Body according to ISO/IEC 17020 standard.


CESI laboratories are recognised and approved by many association as PEHLA, ASTA, LOVAG, CBTL for the IECEx Scheme, under the conformity to ISO/IEC 17025 standard and ISO Guide 65.​​


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