Explosion-Proof Robots: What ATEX/IECEx Certification Actually Buys You
None of the 339 robots in our database carry an ATEX or IECEx rating. If your cell sits in a refinery, paint booth, or battery plant, that is the question to ask before you shortlist anything, not after.
Ask an integrator to quote a robot for a paint booth, a battery electrolyte line, or a refinery walkway, and the first question back is not payload or reach. It is the zone classification. Get that wrong and the arm you already priced out is not an option at any price, because a standard industrial robot has no certification path into an explosive atmosphere at all.
We checked our own database before writing this: zero of the 339 robots we track, across 20 brands, carry an ATEX or IECEx rating. That is not a data gap we plan to backfill by asking manufacturers for a field they do not publish. It is the honest shape of the market. Explosion-proof capability here is a specialist retrofit or a small-batch product built on a standard arm’s chassis, not a checkbox on a FANUC or ABB datasheet.
What “explosive atmosphere” actually means, in zones
ATEX (the EU directive) and IECEx (its international counterpart) classify hazardous areas by how often an explosive atmosphere is present, not by how severe an explosion would be. For gas, vapor, and mist:
| Zone | Frequency | What it means for equipment |
|---|---|---|
| Zone 0 | Continuously present, more than 1,000 hours/year | Highest-hazard equipment category; rare for a robot cell |
| Zone 1 | Likely during normal operation, 10-1,000 hours/year | The common industrial case: paint booths, solvent lines, most refinery process areas |
| Zone 2 | Unlikely, under 10 hours/year, abnormal conditions only | Perimeter areas, unclassified zones adjacent to a process, some Class-2 US-style layouts |
A parallel Zone 20/21/22 scale exists for combustible dust rather than gas (RoboticsTomorrow’s ATEX/IECEx robotics overview). The zone is not a formality: a robot certified for Zone 2 cannot operate in Zone 1. Moving up a zone means a different certification, not a looser interpretation of the one you already have.
Three ways a robot earns the rating
There is no single “ATEX robot” design. Certification comes from one of three protection strategies, and which one a given machine uses shapes what it can and cannot do:
- Intrinsic safety (Ex i). Electrical circuits are limited to energy levels physically incapable of igniting the surrounding atmosphere, even in a fault condition. Common on smaller, lower-power designs.
- Flameproof enclosure (Ex d). The electronics live inside a housing built to contain an internal ignition and stop the flame front from reaching the outside atmosphere, rather than preventing ignition in the first place.
- Pressurization (Ex p). The enclosure is continuously purged with a protective gas at positive pressure, physically excluding the explosive atmosphere from ever reaching the electronics inside.
All three are legitimate, standards-recognized approaches (RoboticsTomorrow); the right one depends on the robot’s power draw, size, and how the zone itself is defined at your site.
Two paths to a certified arm: buy specialist, or retrofit standard
Buy a purpose-built explosion-proof cobot. A.I. Automation sells two ATEX/IECEx and NFPA/FM dual-certified cobots built on a Universal Robots UR20 base: the 15XP (18 kg payload, 1,300 mm reach) and the 30XP (35 kg payload, 1,300 mm reach), positioned for paint booths, flammable-liquid filling, sealing, and gluing operations. Both are de-rated in reach against UR’s own stock UR20 (1,750 mm, 20 kg) — the explosion-proof housing and shielding cost real working envelope, not just money.
Retrofit-certify a robot you already have. For the lower-hazard Zone 2 case specifically, specialist integrator AEP Zimmer offers an ATEX Ex II 3G IIB T3 certification service for an existing collaborative robot, priced at approximately €15,380 excluding VAT, with financing available from roughly €1,000/month (Unchained Robotics’ AEP Zimmer ATEX certification listing). It will not get you into Zone 1, but for perimeter or lower-hazard areas it is a materially cheaper door into a classified zone than a dedicated machine.
| Path | What you get | Approximate cost |
|---|---|---|
| Standard industrial robot (no certification) | Zero hazardous-area capability | $50,000-80,000, arm only |
| Complete standard robot system, integrated | Zero hazardous-area capability | $100,000-150,000 |
| Zone 2 retrofit certification on an existing cobot | Ex II 3G IIB T3, Zone 2 only | ~€15,380 certification fee |
| Purpose-built Zone 1-certified robot | Full Zone 1/21 capability | ~$200,000, robot alone, before integration |
Source: cost figures compiled from RoboticsTomorrow’s ATEX/IECEx robotics overview and Unchained Robotics’ AEP Zimmer listing. Treat these as order-of-magnitude figures, not a quote: zone, protection method, and integration scope all move the number.
Who actually needs this
The demand concentrates in a short list of industries where an ignitable atmosphere is a routine, not exceptional, condition: refineries and petrochemical plants, offshore platforms, and battery and hydrogen-infrastructure manufacturing (RoboticsTomorrow). The narrower retrofit-certified case skews toward paint booths, flammable-liquid filling, sealing, and gluing lines, applications where a facility runs one or two zoned cells inside an otherwise standard plant rather than an entire site classified as hazardous.
If your application does not sit in one of those categories, this is very likely not a spec you need to chase. Adding ATEX/IECEx certification to a shortlist for an unclassified area only narrows your options and adds cost for a capability the site does not require.
What this means for your shortlist
If any part of your cell sits inside a classified zone, the zone classification has to be the first filter, ahead of payload, reach, or brand. Every other spec on this site, and on every catalog brand’s own datasheet, assumes an unclassified area. Our cobot vs. industrial robot guide and CE marking explainer are still the right place to reason through payload, reach, and safety-mode questions once the hazardous-area question is answered, not before it.
What to ask before you shortlist anything for a classified zone
- What is the exact zone classification of the installation location, gas/vapor (0/1/2) or dust (20/21/22), determined by your site’s own hazardous-area classification study, not a guess.
- Which protection method does the quoted robot use, intrinsic safety, flameproof enclosure, or pressurization, and does that match how your zone is actually defined and maintained?
- Is this a purpose-built certified machine or a retrofit certification on a standard robot, and does the retrofit path’s zone rating (often Zone 2 only) actually cover your classified area?
- What payload and reach de-rating does the certified housing cost against the same brand’s standard, uncertified model?
- Who holds the certification, the robot manufacturer or the integrator performing the retrofit, and what happens to that certification if the robot is serviced or modified after installation?
None of these questions has a shortcut. A standard robot, including every one of the 339 we track, is not an option here at any price until one of these two paths is taken.
Frequently asked questions
Does any robot in the Industrial Robotics Hub database have an ATEX or IECEx rating? +
No. None of the 339 robots we track carry a factory ATEX or IECEx certification. Explosion-proof capability in this industry is overwhelmingly delivered as a third-party retrofit or a small-batch specialist product built on a standard arm, not a spec field the major catalog brands publish.
What do Zone 1 and Zone 2 actually mean for a robot cell? +
They describe how often an explosive atmosphere is expected, not how dangerous a single event would be. Zone 1 means a hazardous gas or vapor atmosphere is likely during normal operation, 10 to 1,000 hours a year. Zone 2 means it is only expected briefly, under 10 hours a year, typically an abnormal condition like a seal failure. A robot certified for Zone 2 cannot legally run in Zone 1: it needs a different, more expensive certification, not just a risk-tolerance decision.
How much more does an ATEX-certified robot cost than a standard one? +
Industry figures put a standard industrial robot at roughly $50,000-80,000 and a complete standard system at $100,000-150,000, against approximately $200,000 for a Zone 1-certified robot alone, before integration. A narrower retrofit path exists: certifying an existing collaborative robot for Zone 2 (the lower-hazard classification) through a specialist integrator has been priced around €15,380, a fraction of a purpose-built Zone 1 machine.
Can I just buy a standard cobot and use it in a hazardous area? +
No. A standard robot has no intrinsic-safety, flameproof-enclosure, or purge-pressurization protection, and using one in a classified zone without certification is a safety and regulatory violation, not a gray area. The retrofit and purpose-built options in this article exist specifically because standard catalog robots, including everything in our own database, are not rated for it.
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