ATEX - Directive 2014/34/EU

What ATEX is and why it matters

ATEX — formally Directive 2014/34/EU on equipment and protective systems intended for use in potentially explosive atmospheres — is the EU’s product law for kit that has to operate safely where flammable gases, vapours, mists or combustible dusts can be present. The name comes from the French “ATmosphères EXplosibles”. If you manufacture, import or distribute motors, pumps, sensors, lighting, switchgear, fans, monitoring systems or protective devices that are intended for use in zones where an explosive atmosphere may form, this Directive almost certainly governs how that equipment must be designed, assessed and marked before it can be placed on the EU market.

ATEX matters because the failure mode it guards against is catastrophic: a single ignition source in a refinery, grain silo, paint shop, distillery or chemical plant can cause an explosion. The Directive translates that risk into concrete product duties — equipment grouped and categorised by the hazard it is built to withstand, third-party involvement scaling with that hazard, a distinctive Ex marking, technical documentation and an EU declaration of conformity — all underpinning the CE mark. It is one of the New Legislative Framework directives, so its structure mirrors other CE laws while adding explosion-protection specifics.

📄 Official text: Directive 2014/34/EU on equipment for potentially explosive atmospheres — on EUR-Lex →

Who ATEX applies to

ATEX applies across the supply chain, with duties scaling by role:

Manufacturers — anyone who designs or makes equipment, protective systems, safety devices, controlling devices or regulating devices intended for use in explosive atmospheres, or who markets such products under their own name or trademark. They carry the heaviest obligations, including conformity assessment, technical documentation and Ex marking.
Importers — businesses bringing ATEX products from outside the EU into the Union market. They must verify the manufacturer has carried out the correct conformity assessment, that documentation exists and that the marking is present, and they add their own identification.
Distributors — wholesalers and resellers who must act with due care, check that the CE and Ex markings, declaration and instructions are present, and not supply products they know or should presume to be non-compliant.
Authorised representatives — where a non-EU manufacturer appoints one to carry out defined tasks on their behalf.

The Directive covers equipment for both Group I (mining applications liable to firedamp and/or combustible dust) and Group II (other places with potentially explosive atmospheres at the surface). It is important to distinguish ATEX 2014/34/EU — the product directive aimed at manufacturers — from the separate workplace directive 1999/92/EC, which sets minimum requirements for protecting workers in explosive atmospheres and is an employer obligation rather than a product one.

Key dates and timeline

2014 — Directive 2014/34/EU was adopted as the recast of the earlier ATEX directive, aligning it with the New Legislative Framework.
20 April 2016 — the Directive applies from this date, replacing the previous ATEX product directive 94/9/EC. Because ATEX is a directive, each Member State transposes it into national law, and conformity assessment, marking and documentation duties became enforceable through those national rules.

For the exact transition provisions and effective dates, rely on the official text rather than restated figures.

Core requirements

Equipment groups and categories

ATEX classifies products by where and how safely they must operate. Group I covers equipment intended for underground mining and parts of surface installations endangered by firedamp and/or combustible dust. Group II covers equipment for other places with potentially explosive atmospheres. Within each group, equipment is assigned to categories that reflect the required level of protection — broadly, the higher categories must remain safe even when faults occur or an explosive atmosphere is present for long periods, while lower categories give a normal level of protection. The category determines which conditions the equipment is built to survive and, crucially, how it must be assessed.

Essential health and safety requirements

All equipment within scope must meet the essential health and safety requirements set out in the Directive’s annex, covering the integrated explosion-safety concept: designing out ignition sources, controlling potential ignition energies, choosing materials suited to the atmosphere, and accounting for foreseeable misuse. Conformity with relevant harmonised standards (the EN 60079 and EN/ISO 80079 families are the usual reference) gives a presumption of conformity with the corresponding requirements, but harmonised standards are a route to compliance rather than the legal obligation itself.

Conformity assessment scaled by category

The conformity assessment route depends on the equipment group and category. For higher-risk categories, a notified body must be involved — for example through EU type-examination combined with a production-quality or product-verification module. For lower-risk Group II equipment, the manufacturer can in defined cases rely on internal production control with the technical documentation lodged with a notified body. The principle is consistent: the greater the potential consequence of failure, the more independent third-party scrutiny ATEX requires. Selecting the correct procedure for your group and category is therefore a foundational compliance decision, and the precise modules are set out in the Directive.

Technical documentation and the EU declaration of conformity

Manufacturers must compile technical documentation that demonstrates how the equipment meets the essential health and safety requirements — design and manufacturing drawings, the explosion-protection rationale, applied standards, test and examination results, and any notified-body certificates. They must draw up an EU declaration of conformity stating that the product satisfies 2014/34/EU, and keep both the declaration and the documentation available to authorities for the retention period set by the Directive. Each product must also be accompanied by instructions in a language easily understood by users in the Member State concerned.

Marking: CE plus the Ex marking

ATEX equipment carries the CE marking like other CE-regulated products, and where a notified body is involved in production surveillance, its identification number. In addition, ATEX requires the specific marking of explosion protection — the distinctive “Ex” hexagon symbol — followed by the equipment group and category (and, where relevant, the gas/dust indication). The marking must show the manufacturer’s identity, the type or series designation, any serial number, and the year of construction. This Ex marking is what tells an installer at a glance that a product is built and certified for a hazardous area, and for which group and category.

Obligations by role

Manufacturers — classify equipment by group and category, meet the essential health and safety requirements, run the correct conformity assessment (involving a notified body where required), compile technical documentation, draw up the EU declaration of conformity, and apply the CE and Ex markings with instructions.
Importers — verify the manufacturer’s conformity assessment and documentation, check the markings and declaration are present, add their own identification, and refuse non-compliant products.
Distributors — confirm the CE and Ex markings, declaration and instructions are in place, store and transport products without compromising conformity, and stop supply of products they believe to be non-compliant.
Authorised representatives — perform the tasks specified in their mandate, typically holding documentation and cooperating with authorities.

Enforcement

Each Member State designates market surveillance authorities to enforce ATEX. In Denmark, the Danish Safety Technology Authority (Sikkerhedsstyrelsen) is the competent authority for ATEX equipment placed on the market. Authorities can require corrective action, demand technical documentation and the declaration of conformity, restrict or prohibit the making available of non-compliant equipment, and order withdrawals or recalls.

Because ATEX is part of the EU market surveillance system, dangerous or non-compliant products can be shared EU-wide through the Safety Gate rapid alert system, so action taken in one country can ripple across the Union. Consequences for non-compliance are set at national level and can include sales bans, recalls, fines and the reputational damage that follows a public alert — particularly serious for products whose failure could cause an explosion.

Getting compliant

Confirm your equipment is in scope and identify the correct group (I or II) and category.
Identify the relevant essential health and safety requirements and the applicable harmonised standards.
Select the conformity assessment procedure for your category and engage a notified body where required.
Compile technical documentation including the explosion-protection rationale and any notified-body certificates.
Draw up the EU declaration of conformity and retain it with the documentation.
Apply the CE marking, the notified body number where applicable, and the Ex marking with group, category and identification details.
Provide instructions in the right languages and keep records available for market surveillance.
Check whether the workplace directive 1999/92/EC also affects how the equipment is used (an employer duty, distinct from this product law).

How Conphora helps

Conphora monitors ATEX and maps your products against its requirements, flagging gaps in group and category classification, conformity assessment, technical documentation, the declaration of conformity and the CE and Ex markings before they become enforcement problems. The platform helps you generate and keep the right documentation, and alerts you when obligations change so your compliance stays current.

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Sources and further reading

This guide is for general information and is not legal advice.

Last updated: 12 June 2026