Comparison between ATEX, IECEx and CNEx

When purchasing equipment products, many customers will encounter a variety of explosion proof safety certification marks.

ATEX or IECEx and CNEx certified equipment products (e.g. explosion proof cameras ) are essential for use in any potentially explosive or hazardous environment and are an important guarantee of production safety.

We will present the common explosion proof marking.

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  CNEx	(China National Explosion-Proof Certification)
  Geographical Scope	CNEx is specific to China and is required for equipment used in explosive atmospheres within Chinese territory.
  Certifying Body	CNEx certification, which ensures compliance with Chinese national standards for explosion-proof equipment, is issued by the China National Product Quality Supervision and Testing Centre.
  Standards	CNEx certifications are based on Chinese national standards (GB) related to explosion protection.
  Marking	CNEx certified products are marked with the CNEx logo.

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  ATEX	(ATmosphères EXplosibles)
  Geographical Scope	ATEX is primarily relevant in the European Union (EU) and European Economic Area (EEA).
  Certifying Body	ATEX certifications are issued by notified bodies within the EU, ensuring compliance with the ATEX directives (Directive 2014/34/EU).
  Standards	ATEX certifications are issued by notified bodies within the EU, ensuring compliance with the ATEX directives (Directive 2014/34/EU).
  Marking	Products compliant with ATEX directives are marked with the Ex symbol and CE marking.

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  IECEx
  Geographical Scope	IECEx is an international certification system recognized in many countries worldwide.
  Certifying Body	The International Electrotechnical Commission (IEC) manages the IECEx System, which issues certifications for electrical equipment used in explosive atmospheres.
  Standards	IECEx certifications are based on international IEC standards, ensuring consistency and compatibility across different countries.
  Marking	Products certified under IECEx are marked with the Ex symbol.

• Comparison
  Geographical Coverage	ATEX is limited to the EU/EEA, IECEx is international, and CNEx is specific to China.
  Certifying Bodies	ATEX and CNEx certifications are issued by national authorities or designated bodies, whereas IECEx is managed by the IEC, an international standard-setting organization.
  Standards	ATEX and CNEx certifications follow national or regional standards, while IECEx adheres to international IEC standards.
  Marking	All three certifications use the Ex symbol to denote compliance with explosion protection standards, but the detailed marking requirements may vary.