Certified for More

Hazardous Area
Market Access

Expand Your Device’s Potential with Ex Certification

Unlock New Markets for Your Regulated Measuring Equipment

If your equipment is certified under MID or NAWI, it already meets strict legal metrology standards. Adding Ex certification (ATEX, IECEx, UKCA Ex) also allows it to be used in or near hazardous areas—such as chemical plants and other environments where flammable gases, vapours, dusts, or powders may be present.

As part of the NMi Group, NMi Certin works closely with ExVeritas—our in-group specialists in hazardous area certification—to offer a streamlined process tailored to regulated measuring devices. Together, we help you meet global requirements with less complexity and greater efficiency.

Start with a Hazardous Environment Safety Certification Review

Before committing to certification, our senior Ex experts will carry out a tailored review of your product and its potential to meet hazardous area requirements. This includes:

– Review of global Ex certification options (ATEX, IECEx, NEC500, UKCA Ex)
– Analysis of your product’s design against gas/dust zone classifications
– Identification of viable protection concepts (Ex d, Ex i, Ex p, etc.)
– A roadmap of required changes (if any), timelines, and indicative costs
– Alignment with your existing MID or NAWI certifications

Think of it as adding an Ex certification specialist to your team—without the overhead.

Why Add Ex Certification to Your Measuring Devices?

– Expand into high-demand industries such as oil & gas, petrochemicals, mining, and energy
– Streamline compliance with a coordinated approach to MID/NAWI and Ex requirements
– Avoid duplicated effort with a review that identifies key overlaps
– Access global markets with ATEX and IECEx approvals
– Gain confidence early in design, documentation, and timelines

The NMi and ExVeritas Advantage

NMi is a preferred European Notified Body for regulated measuring devices. ExVeritas brings global recognition in hazardous area certification. Together, we offer:

An integrated to legal metrology and Ex compliance
Deep technical expertise in both regulated and hazardous environments
A single point of contact throughout the certification process

FAQ

What documentation is needed to begin Ex certification?

To begin the process, you’ll typically need:

General arrangement drawings + certification drawings
Material datasheets (for critical components)
Sample product(s) for assessment
Applicable test reports
User instructions and installation guidelines
Safety compliance evidence (e.g. intrinsic safety calculations)
Valid ISO 9001 certificate (or equivalent QMS)

We’ll help you review and align your documentation before submission.

Can I combine audits for MID, ISO 9001, and Ex (ATEX/IECEx QAN/QAR)?

Yes, in many cases. While it’s technically complex, combining audits has major benefits:

Fewer audit days
Less time coordinating teams
Lower travel and administrative costs
One unified report = simpler follow-up

Let us know your current audit scope, and we’ll advise on integration potential.

In MID, non-metrological changes must be listed on the certificate. Does this apply under ATEX?

No — not in the same way. If a change isn’t included in the Ex schedule drawing, and it doesn’t impact safety, re-certification (variation) is not needed. This is why clear, efficient schedule drawings — focused only on relevant elements — are critical. We support you in preparing these correctly to minimise certification complexity.

Is there a difference between certifying a single instrument and a full system?

Yes. Ex certification can apply to:

Equipment: stand-alone devices
Components: elements used in assemblies
Assemblies: a defined combination of certified parts

It’s important to define your system architecture early — we can help clarify the right certification path.

Which AWI system components need ATEX certification?

Any component located in an ATEX-classified zone will typically require Ex certification. Additionally, components outside the zone may still need certification if they play a role in ensuring safety within the hazardous area. Protective systems and interfaces are also commonly in scope.

How long does it take to transfer Ex certification from another Notified Body?

It depends on the complexity and whether your documentation or product needs updating to meet the latest standards. However, we can review your current certificates quickly and provide a free expert assessment.

We’ll identify the most efficient transfer path — and where possible, help expand your certification for broader market access.

Do hardware changes require a full retest under Ex certification?

Not necessarily.

If your existing instrument has a valid accredited test report, a full retest is often not required. We can assess whether your change impacts safety — and if not, we can accept the report and update the certification accordingly. This approach avoids unnecessary testing and cost, unlike in MID where even non-metrological changes must be documented.