CE Marking vs ATEX Marking

CE marking and ATEX marking are commonly found on hazardous area equipment used in oil and gas facilities, chemical plants, refineries, pharmaceutical production sites, and other industries where explosive atmospheres may occur.

Because the two markings often appear together on the same nameplate, many engineers and procurement professionals assume they represent the same certification. In reality, CE marking and ATEX marking serve different purposes and communicate different information.

Understanding the distinction between CE marking and ATEX marking is essential for equipment selection, regulatory compliance, and hazardous area safety.

Quick Answer

What Is CE Marking?

CE marking is a conformity mark used throughout the European Union to indicate that a product complies with applicable European legislation.

The letters "CE" stand for Conformité Européenne, meaning European Conformity.

By applying the CE mark, a manufacturer declares that the product satisfies all relevant European requirements applicable to that product.

Depending on the product type, these requirements may originate from multiple European directives or regulations.

Examples include:

• ATEX Directive 2014/34/EU
• Low Voltage Directive (LVD)
• Electromagnetic Compatibility Directive (EMC)
• Machinery Directive
• Radio Equipment Directive (RED)

CE marking therefore represents regulatory compliance but does not by itself indicate suitability for hazardous areas.

What Is ATEX Marking?

ATEX marking is a hazardous area identification marking required for equipment intended for use in potentially explosive atmospheres under ATEX Directive 2014/34/EU.

Unlike the CE mark, ATEX marking provides technical information regarding the hazardous area suitability of the equipment.

A typical ATEX marking may appear as follows:

II 2G Ex db IIC T4 Gb

This marking communicates critical information used by engineers and inspectors when selecting hazardous area equipment.

What Information Does ATEX Marking Provide?

Marking Element	Meaning
II	Equipment Group
2G	ATEX Category
Ex db	Protection Concept
IIC	Gas Group
T4	Temperature Class
Gb	Equipment Protection Level

These details allow users to determine whether the equipment is suitable for a specific hazardous area classification.

Can Equipment Have Both CE and ATEX Marking?

Yes. Hazardous area equipment placed on the European market typically carries both CE marking and ATEX marking.

The CE mark demonstrates compliance with applicable European legislation, while the ATEX marking identifies the equipment's hazardous area certification characteristics.

The two markings complement each other rather than serving the same purpose.

CE Marking vs ATEX Marking Comparison

Although CE marking and ATEX marking often appear together on hazardous area equipment, they communicate different information and serve different regulatory purposes.

Feature	CE Marking	ATEX Marking
Primary Purpose	EU Regulatory Compliance	Hazardous Area Identification
Applies To	Many Product Categories	Explosive Atmosphere Equipment
Required in Europe	Yes (Where Applicable)	Yes for ATEX Equipment
Shows Zone Suitability	No	Yes
Shows Protection Concept	No	Yes
Shows Gas or Dust Group	No	Yes
Shows Temperature Class	No	Yes
Shows EPL	No	Yes

Example of CE Marking

A CE marking may appear as:

CE

Or in some cases:

CE 0081

The CE mark itself does not identify whether equipment is suitable for hazardous areas.

It simply indicates that the manufacturer declares conformity with applicable European legislation.

When a Notified Body participates in certain conformity assessment activities, its identification number may appear adjacent to the CE marking.

Example of ATEX Marking

A typical ATEX marking may appear as:

II 2G Ex db IIC T4 Gb

Unlike CE marking, this information allows engineers to determine:

• Equipment group
• Equipment category
• Protection concept
• Gas group
• Temperature class
• Equipment Protection Level (EPL)
• Zone suitability

ATEX marking therefore provides the technical information required for hazardous area equipment selection.

How CE and ATEX Markings Appear Together

A hazardous area nameplate often contains both markings.

For example:

CE 0081
II 2G Ex db IIC T4 Gb

In this example:

• CE 0081 indicates conformity with applicable European legislation and identifies the relevant Notified Body.
• II 2G Ex db IIC T4 Gb identifies the hazardous area certification characteristics of the equipment.

Together, these markings provide both regulatory and technical information.

Relationship Between CE Marking and ATEX Directive 2014/34/EU

ATEX Directive 2014/34/EU is one of many European directives that may require CE marking.

When hazardous area equipment complies with ATEX requirements and completes the applicable conformity assessment procedures, the manufacturer may apply the CE mark.

The CE mark therefore reflects compliance with the directive, while the ATEX marking communicates the technical details of the hazardous area certification.

Relationship with ATEX Notified Bodies

ATEX Notified Bodies may participate in conformity assessment activities depending on the equipment category and certification route.

Where required, the Notified Body performs technical evaluations, audits, or certification reviews in accordance with ATEX Directive 2014/34/EU.

The organization's identification number may then appear alongside the CE marking.

However, the Notified Body number itself does not replace the ATEX marking and does not provide hazardous area classification information.

Common Misunderstandings

CE Marking Means Explosion-Proof Equipment

No. Many non-hazardous products carry CE marking. The CE mark alone does not indicate hazardous area suitability.

ATEX Marking Replaces CE Marking

No. ATEX equipment intended for the European market generally requires both CE marking and ATEX marking.

CE Marking Identifies Hazardous Area Zones

No. Hazardous area zone suitability is determined using ATEX marking information such as category and EPL.

ATEX Marking Is Only Required for Electrical Equipment

No. ATEX requirements may apply to both electrical and non-electrical equipment intended for explosive atmospheres.

Frequently Asked Questions (FAQ)

What is the difference between CE marking and ATEX marking?

CE marking indicates conformity with applicable European legislation, while ATEX marking provides hazardous area classification and explosion protection information.

Can equipment have CE marking without ATEX marking?

Yes. Many products carry CE marking but are not intended for hazardous area applications and therefore do not require ATEX marking.

Can equipment have ATEX marking without CE marking?

Equipment placed on the European market under ATEX Directive 2014/34/EU generally requires CE marking in addition to ATEX marking.

Does CE marking indicate Zone 1 suitability?

No. Zone suitability is determined by reviewing the ATEX category, EPL, and protection concept shown in the ATEX marking.

What does CE 0081 mean?

CE indicates conformity with European legislation, while 0081 identifies the Notified Body associated with the conformity assessment process.

Conclusion

CE marking and ATEX marking serve different but complementary roles within the European hazardous area regulatory framework.

The CE mark demonstrates conformity with applicable European legislation, while the ATEX marking provides the technical information needed to determine hazardous area suitability.

Understanding the difference between these markings helps engineers, inspectors, procurement teams, and facility operators make informed equipment selection decisions and maintain compliance with hazardous area requirements.

Technical Review

References

• Directive 2014/34/EU – Equipment and Protective Systems Intended for Use in Potentially Explosive Atmospheres.
• European Commission Blue Guide on the Implementation of EU Product Rules.
• European Commission ATEX Guidelines.
• IEC 60079 Series – Explosive Atmospheres Standards.
• IECEx Certification System Documentation.