How Long Does It Take to Get ATEX Certification?

This is the most common question R&D and sales teams ask when entering the ATEX process: "How long until we have it in hand?" The correct answer varies from weeks to months depending on the product's category, protection type, and whether notified body involvement is required. In this article we cover the factors that determine the timeline, realistic time expectations by category, and ways to speed up the process.

The Primary Factor Determining Timeline: Category

The factor that most affects the duration of the ATEX process is which category the equipment falls into. Category 3 equipment proceeds under Module A (self-declaration), so there is no notified body waiting time; the process largely depends on internal testing and documentation preparation. For Category 1 and 2, EU-Type Examination (Module B) is mandatory, so the process duration becomes largely dependent on the notified body's review schedule. We covered how category determination is made in our article What Is ATEX?.

Realistic Time Expectations by Category

For Category 3 equipment, once the technical file and required tests are ready, the process can generally be completed within a few weeks. For Category 2 equipment, the notified body's type examination process is added, so the total timeline can extend from a few weeks to a few months. For Category 1 equipment, both type examination and production-stage audit (Module D/H) are required, making it take the longest — generally a few months. These timeframes can vary depending on product complexity, file quality, and the notified body's current workload.

The Steps That Extend the Process the Most

Based on our experience, the three factors that extend the process the most are: laboratory appointment waiting times (which can extend to several weeks, especially during busy periods), design revisions arising after testing (which can take from a few weeks to months depending on the root cause), and review periods stemming from the notified body's own workload. Anticipating these three factors at the very start of the process is key to creating a realistic project timeline. We covered how the need for testing is determined in our article How Is ATEX Risk Analysis Carried Out?.

The Parallel Work Approach That Speeds Up the Process

Not all steps of the ATEX process need to wait for each other sequentially. Technical file preparation, user manual writing and ignition source analysis can be carried out in parallel with the notified body's type examination process. This parallel work approach can significantly shorten total duration, especially for Category 1 and 2 products. We covered in detail which elements the technical file should contain in our article How Is the ATEX Technical File Prepared?.

Existing Product vs. New Design: Which Is Faster?

Including an existing, already-in-production product in the ATEX process can proceed relatively quickly if the product's design is already close to ATEX requirements. However, if the product was designed without ATEX requirements in mind, a substantial revision may be required, and in that case the process can take longer than a product designed ATEX-compliant from scratch. For this reason, taking ATEX requirements into account from the very start of the design in new product development projects optimizes both cost and timeline.

Running in Parallel With IECEx

If you are planning to sell to both the EU/Türkiye and markets outside the EU, planning the ATEX and IECEx test campaign together from the start saves significant time. Thanks to the substantial overlap between EN and IEC 60079 series standards, a single round of testing can form the basis for both applications; starting a separate IECEx application after the ATEX process is complete means largely repeating the process. See our article Difference Between IECEx and ATEX on this topic.

Practical Ways to Speed Up the Process

• Clarify category and protection type determination decisively at the very start of the process.
• Schedule the laboratory appointment as early as possible, before the technical file is ready.
• Prepare the technical file completely, in the format the notified body will request, to prevent additional information requests.
• Run technical file and user manual preparation in parallel with the notified body process.
• Plan your ATEX and IECEx needs together from the start to avoid repeated test rounds.

Relevant Directives and Standards

The conformity assessment modules that affect the duration of the ATEX process are defined in Decision No 768/2008/EC. Which module applies is determined by the category definitions in the annex of ATEX Equipment Directive 2014/34/EU. Test durations depend on the methods defined in the harmonized EN IEC 60079 series standards; some tests (for example, long-term temperature stability tests) can inherently take longer than others.

Step-by-Step Process

1. Clarify your product's category and protection type to determine the expected duration range.
2. Plan required laboratory tests as early as possible and secure appointments.
3. Begin preparing the technical file in parallel with testing.
4. For Category 1-2 products, submit the notified body application early.
5. Assess test results and make a targeted design revision if necessary.
6. Complete the technical file, user manual, and declaration of conformity simultaneously.
7. Finalize the process by affixing the CE and Ex marks.

Most Common Mistakes

• Postponing the laboratory appointment until the technical file is complete, wasting unnecessary time.
• Determining category too late and having to switch modules midway through the process.
• Also pausing technical file and manual preparation while waiting for the notified body process.
• Building an overly optimistic timeline that never accounts for the possibility of post-test revision.
• Never evaluating IECEx needs until the ATEX process is finished.

Frequently Asked Questions

Conclusion

The duration of ATEX certification cannot be expressed as a single fixed figure; category, protection type and whether notified body involvement is required directly determine the timeline. Planning the process correctly from the start, identifying steps that can run in parallel, and anticipating possible delay points in advance are key to building a realistic market entry schedule.