Last updated: November 5, 2026

ATEX & IECEx Explosion Proof Certification Guide

Choosing the right Ex luminaire is a safety engineering decision. Gas group, temperature class and protection class combine into one Ex marking. This ATEX IECEx certification guide decodes ATEX certification and IECEx certification, explains hazardous area classification and zone 0 zone 1 zone 2 rules.

Block	Example	Meaning	Buyer check
Ex	Ex	Equipment protected against explosive atmospheres	Mark must be present and legible
Protection	ib	Intrinsic safety, one fault margin	d for Zone 1 heavy duty, ib for slim inspection torch
Gas group	IIC	Hydrogen and acetylene	IIC covers IIA and IIB automatically
Temp class	T6	Max surface 85 C	T4 is typical, T5/T6 for low ignition gases
EPL	Gb	Zone 1 and Zone 2	Ga for Zone 0, Gc for Zone 2 only

Contents
Why Explosion Proof Lighting Exists: The Fire Triangle	Gas Groups IIA, IIB and IIC
Hazardous Area Classification: Zone 0, 1, 2 and 20, 21, 22	Zone Based Selection Decision Table
Certification Systems Compared: ATEX, IECEx, Ex China and NEC 500	Step by Step Selection Using This ATEX IECEx Certification Guide
How to Read an Ex Marking: Every Character Decoded	Common Misconceptions to Avoid
Protection Concepts Explained: d, ib, e, m, p, o	Certificate Verification and Site Inspection Checklist
Temperature Classes T1 to T6 and Autoignition	Frequently Asked Questions

Why Explosion Proof Lighting Exists: The Fire Triangle

A gas explosion needs three things at the same time: a flammable substance in the right concentration, oxygen from air, and an effective ignition source. Remove any one side and the triangle collapses. Ordinary lighting fails the third side because a switched contact, a charging socket or a hot LED heat sink can all become that ignition source.

A certified Ex luminaire is designed around the triangle. If gas enters the housing and ignites internally, the heavy enclosure contains the pressure. It also cools escaping gases so they cannot reignite the atmosphere outside. The external surface is capped below the autoignition temperature of the surrounding gas.

This is why certification, not marketing words, decides whether a lamp may enter a classified area.

Certification engineer inspecting an explosion proof light under magnification, hazardous area classification review of the Ex marking, battery and flame path before approval

Three failure modes matter. First, an external arc or spark can ignite a flammable mixture directly. Second, an external surface can exceed the autoignition temperature and act as a hot plate. Third, an internal explosion can rupture a weak enclosure and send flame out.

Protection concepts address each mode differently, so one Ex marking is never enough without reading all its blocks.

Hazardous Area Classification: Zone 0, 1, 2 and 20, 21, 22

Hazardous area classification is the site map that says where flammable gas, vapor or dust can appear, and for how long. Every approved Ex luminaire must match the zone it is installed in.

Zone	Atmosphere	Presence	Typical location	Allowed EPL
Zone 0	Gas vapor	Continuous or long	Tank vapor space, analyzer cell	Ga
Zone 1	Gas vapor	Likely in normal operation	Pump seal, loading arm, sample point	Gb
Zone 2	Gas vapor	Unlikely, short only	Bund wall, drum filling outer area	Gc
Zone 20	Combustible dust	Continuous or long	Inside silo, hopper, mill	Da
Zone 21	Combustible dust	Likely in normal operation	Fill opening, bag dump station	Db
Zone 22	Combustible dust	Unlikely, short only	Dust collection outer area	Dc

Gas zones: Zone 0, Zone 1, Zone 2

Zone 0 covers areas where a flammable gas or vapor mixture is present continuously, or for long periods, or frequently. Only intrinsically safe ia equipment may enter Zone 0.

Zone 1 covers areas where a flammable gas mixture is likely to occur in normal operation. Zone 1 allows flameproof d, intrinsically safe ib, increased safety e, pressurized p and encapsulated m equipment.

Zone 2 covers areas where a flammable gas mixture is not likely in normal operation. Zone 2 permits nA equipment, Ec EPL fixtures and the more common Gb lamps.

Dust zones: Zone 20, Zone 21, Zone 22

Combustible dust follows a parallel three-zone scheme. Every dust-site Ex luminaire carries Db or Dc equipment protection levels and a separate dust temperature class.

Certification Systems Compared: ATEX Certification, IECEx Certification, Ex China and NEC 500

Four major certification systems appear on international projects. They share the same underlying Ex logic but differ in legal basis, mark and mutual recognition.

ATEX, the European system

ATEX certification comes from the two ATEX directives adopted in the European Union. ATEX requires a notified body involvement for groups I and II categories M2, 1 and 2.

IECEx, the international system

IECEx certification runs under the IEC 60079 series and is administered by the IECEx certification scheme. In practice, ATEX and IECEx test the same product to the same clauses.

Ex China, the national system

China has its own Ex certification scheme under the GB 3836 series, harmonized with IEC but not automatically mutual recognized.

NEC 500 and 505, the North American system

North America uses NEC Article 500, which classifies locations as Class I Division 1 and Division 2. UL and CSA are the main certifiers.

System	Legal base	Mark	Accepted in	Key note
ATEX	EU directives	CE + Ex hexagon	EU, many contractors	Notified body required for category 1 and 2
IECEx	IEC 60079 scheme	IECEx logo	Global tenders	One test report often covers both ATEX and IECEx
Ex China	GB 3836 series	CEx / NEPSI	Domestic China	Not automatically recognized in EU or USA
NEC 500/505	US National Electrical Code	UL / CSA listing	USA, Canada	Division 1 equals Zone 1 broadly

How to Read an Explosion Proof Light Marking: Every Character Decoded

Walk up to any certified lamp and you will see a line that looks like Ex ib IIC T6 Gb. Each block answers one approval question.

Block	Example	Meaning	Buyer check
Ex	Ex	Equipment protected against explosive atmospheres	Mark must be present and legible
Protection	ib	Intrinsic safety, one fault margin	d for Zone 1 heavy duty, ib for slim inspection torch
Gas group	IIC	Hydrogen and acetylene	IIC covers IIA and IIB automatically
Temp class	T6	Max surface 85 C	T4 is typical, T5/T6 for low ignition gases
EPL	Gb	Zone 1 and Zone 2	Ga for Zone 0, Gc for Zone 2 only

Why the battery pack is part of the marking
A handheld Ex lamp is tested as an assembly. The lamp head, switch, battery pack and charger are all evaluated together. A third party replacement cell voids the certificate.

What Ga, Gb and Gc really mean
Ga is very high protection for Zone 0. Gb is high protection for Zone 1 and Zone 2. Gc is enhanced protection for Zone 2 only.

Protection Concepts Explained: d, ib, e, m, p, o
The letter after Ex is the protection concept. Six concepts dominate the lighting world.

Ex d, Flameproof Enclosure
Ex d means flameproof enclosure. Ex d is widely used for fixed lighting, junction boxes and many handheld torches for Zone 1 and Zone 2.

Ex ib and Ex ia, Intrinsic Safety
Ex ib and Ex ia limit electrical energy to a level insufficient to ignite flammable gas. Ex ia includes two fault margins, and it is the only handheld type approved for Zone 0.

Ex e, Increased Safety
Ex e provides extra safety margins for terminal boxes and connection chambers.

Ex m, Encapsulation
Ex m encapsulates spark-generating components inside resin.

Ex p, Pressurization
Ex p maintains the enclosure with clean air under positive pressure.

Concept	How it works	Typical zone	Typical lamp
d flameproof	Heavy enclosure contains internal explosion	Zone 1, 2	Handheld torch, fixed floodlight
ib intrinsic	Energy limited below ignition level	Zone 1, 2	Slim inspection torch
ia intrinsic	Energy limited, two fault margins	Zone 0, 1, 2	Tank entry torch
e increased safety	Extra clearance and cooling	Zone 1, 2	Terminal box, fitting
m encapsulation	Spark parts sealed in resin	Zone 1, 2	Driver board, indicator
p pressurized	Purge with clean air at positive pressure	Zone 1, 2	Analyzer cabinet

Temperature Classes T1 to T6 and Autoignition

The T class caps the maximum external surface temperature. T6 is the strictest and the safest for low-autoignition gases.

Class	Max surface temp	Typical use
T1	450 C	High temperature furnaces, low hazard gases
T2	300 C	General refinery areas
T3	200 C	Many petrochemical streams
T4	135 C	Common standard, covers a wide range of solvents
T5	100 C	Low ignition temperature gases
T6	85 C	Hydrogen, carbon disulfide, conservative choice

Match the T class to the lowest autoignition temperature in the process. The conservative engineering habit is to choose T6 whenever the power budget allows.

Gas Groups IIA, IIB and IIC

Gas grouping measures how easily a gas ignites. IIC lamps also cover IIA and IIB, which is why many buyers specify IIC as a default.

IIA covers propane, town gas, butane. IIB covers ethylene, ethane, coke oven gas. IIC covers hydrogen, acetylene, carbon disulfide.

Group	Representative gas	Common sites	Select this lamp if
IIA	Propane	LPG bottling, LNG offloading	Only propane or town gas present
IIB	Ethylene	Refinery, petrochemical cracker	Typical hydrocarbon processing
IIC	Hydrogen, acetylene	Hydrotreater, chlor alkali, welding	Any hydrogen present, or conservative spec
IID	Methane in mines	Underground coal	Methane mine atmosphere

Zone 0 Zone 1 Zone 2 Based Selection Decision Table

Once the zone, gas group and T class are known, the protection concept narrows down quickly.

Zone	Minimum EPL	Typical concept	Typical lamp shape	Surface temp
Zone 0 gas	Ga	ia intrinsically safe	Slim handheld torch	T6 preferred
Zone 1 gas	Gb	d, ib, e, m, p	Handheld torch, fixed flood, work light	T4 to T6
Zone 2 gas	Gc	nA, ec, ob	Economy torch, fixed fitting	T3 to T4
Zone 20 dust	Da	ia intrinsic, encapsulation	Compact sensor light	Dust layer temp
Zone 21 dust	Db	tD, tb	Fixed dust tight fitting	Below dust layer ignition
Zone 22 dust	Dc	tc	Sealed industrial fitting	Conservative T4

Step by Step Selection Using This ATEX IECEx Certification Guide

A clean procurement workflow prevents the frequent selection errors. Walk the six steps in order.

1. Confirm the zone on the drawing.
2. List the gases and vapors present.
3. Pick the gas group.
4. Pick the temperature class.
5. Pick the protection concept.
6. Verify the certificate.

Once the zone and marking are settled, match the decision to the real families: browse the explosion proof light product range for fixed and portable Ex fixtures, see how these ratings apply on site in the hazardous area lighting scenarios for refineries, and use a mobile light tower for temporary turnaround lighting. Handheld inspection work pairs with the bulk flashlights and torches line, while certified spares come from the battery packs and chargers range.

Common Misconceptions to Avoid

After years of site audits, a handful of mistakes recur.

Mistake one: IP65 means explosion proof

IP65 only proves that dust and water cannot get in. It says nothing about ignition energy. Always look for the Ex marking and a certificate number.

Mistake two: Zone 2 can use ordinary lights

Zone 2 is still a classified area. Ordinary lights without Gc or Ec EPL are not allowed.

Mistake three: one certificate covers every model

Each model, its battery and its switch combination are tested as one assembly.

Mistake four: ATEX and IECEx are interchangeable stickers

The test logic is shared, but the legal mark differs. Pick the mark the end user files.

Mistake five: IIC T6 automatically covers dust

A gas-certified lamp with Gb marking is not automatically approved for a dust zone.

Certificate Verification and Site Inspection Checklist

Use this checklist at order intake and again at site arrival. It turns a vague "send me an ATEX lamp" request into a traceable approval record.

• Certificate number: record the Ex certificate number, issuing body and validity; verify it online against the public register.
• Nameplate cross check: compare model, manufacturer, gas group, temperature class, EPL and protection concept on the housing against the certificate line by line.
• Battery and charger: confirm the battery pack model and charger are inside the certified assembly; refuse third-party cells.
• Zone coverage: confirm the certificate explicitly covers the zones on your drawing, zone 0 zone 1 zone 2 or the corresponding dust zones.
• Temperature and gas group: confirm the T class meets or beats the lowest autoignition temperature, and IIA IIB or IIC matches the hardest site gas; mines use Group I.
• IP and IK: record ingress and impact ratings separately; they are add-ons and do not replace Ex protection.
• Installation and spares: check the flame path gaps, certified cable glands and torque figures on the drawing; list certified spare seals, lens gaskets and switch caps for site repair.

ATEX 2014/34/EU vs IECEx Scheme: Notified Body vs ExCB, 12-18 Week Test Cycle and Post-Certificate Surveillance

An ATEX IECEx certification guide must explain how the two systems actually differ on paper. They share the same IEC 60079 test clauses, but the legal route, the issuing body and the surveillance rhythm are not the same.

ATEX: EU directive and Notified Body

ATEX is the European legal framework, anchored in Directive 2014/34/EU. It requires a Notified Body to issue an EU-type examination certificate. Common Notified Bodies include Baseefa, LOM, Intertek (ITS) and TUV. The certificate number looks like "ITS 19 ATEX 12345 X".

After certificate issue, ATEX requires annual factory inspection by the Notified Body. The quality system audit keeps the certificate alive. Without the annual audit, the certificate lapses. The CE mark on the product can be challenged at any EU customs point.

IECEx: international scheme and ExCB

IECEx is the voluntary international scheme run by the IEC. It uses Ex Certification Bodies (ExCB) such as PTB in Germany and SRC in Russia. The route combines an Ex Test Report (ExTR) with an Ex Certification Report (ExCR). The certificate number looks like "IECEx ITS 19.0012 X".

IECEx surveillance runs on a three-year cycle rather than annual. It is more flexible for global brands selling outside the EU. However, IECEx alone does not grant CE marking. EU-bound product still needs ATEX.

Test cycle and cost

The official IECEx landing page isiecex.iec.ch. For the broader standards family, see the IEC 60079 series.

Step	ATEX	IECEx
Sample submission to lab	Week 0	Week 0
Type testing (flamepath, temp, IP)	Weeks 2-10	Weeks 2-10
Quality system review	Weeks 10-14	Weeks 10-14
Certificate issue	Weeks 14-18	Weeks 14-18
Typical cost per model	€8,000-15,000	€7,000-13,000
Post-cert surveillance	Annual factory audit	3-year surveillance visit

NEC 500 vs NEC 505 in North America: Class I Div 1/2 Mapping to Zone and UL 844/UL 913

ATEX and IECEx do not work in the United States. North America runs on the National Electrical Code. Buyers shipping to refineries in Texas or Louisiana must follow NFPA 70 NEC Articles 500 and 505.

Division system (NEC 500)

NEC 500 classifies gas locations as Class I, Division 1 or Division 2. Division 1 covers areas where an ignitable concentration exists continuously or frequently. Division 2 covers areas where such a concentration exists only abnormally. The mapping to Zone is approximate but useful.

NEC 500 Division	Rough Zone equivalent	Typical lamp approval
Class I Division 1	Zone 0 + Zone 1 combined	UL 844 explosion-proof or UL 913 intrinsic safety
Class I Division 2	Zone 2	UL 844 or non-incendive rated
Class II Division 1	Zone 21 (dust)	Dust-ignition-proof per UL 1203
Class II Division 2	Zone 22 (dust)	Dust-tight enclosures

NEC 505: the Zone-based alternative

NEC 505 is the zone-based alternative adopted voluntarily by some US states and plant owners. It aligns with IECEx Zone 0/1/2 terminology. Even under NEC 505, however, the product must still carry a UL or FM certificate. An ATEX certificate on its own is not accepted by OSHA inspectors.

UL standards and OSHA

UL 844 covers explosion-proof and dust-ignition-proof luminaires. UL 913 covers intrinsically safe apparatus. OSHA enforces hazardous location wiring through29 CFR 1910.307. The test route itself is described in UL 844. Expect a UL or FM add-on test cycle of another 16-24 weeks on top of the ATEX baseline.

Certificate Verification SOP: Five Steps to Validate ATEX and IECEx Documents Before Site Arrival

Counterfeit Ex certificates are common in low-budget supply chains. Use this five-step SOP at order intake and again at site delivery. It takes ten minutes and stops a wrong shipment.

Step 1: Read the certificate number format

An ATEX cert reads "ITS 23 ATEX 12345 X" or "Baseefa 18ATEX0123U". The prefix names the Notified Body. The "ATEX" block confirms the directive. A trailing "X" means special conditions apply. A missing "X" still means the certificate is valid, but without special conditions.

Step 2: Identify the issuing Notified Body

ITS means Intertek. Baseefa is the UK body. LOM is the Czech body. TUV has several regional offices. Cross-check the body's name and number in the EU NANDO Notified Body list. If the body number does not match the name, the document is fake.

Step 3: Query the IECEx database

Open the IECEX Certification Database. Type the certificate number. The record shows the holder, the valid status, the protected equipment list and the expiry date. An entry that returns "not found" is grounds to reject the order.

Step 4: Cross-check the nameplate

On arrival, read the product nameplate. The Ex marking must match the certificate line by line. Compare "Ex d IIC T6 Gb" on the nameplate with the same string on the certificate. A mismatch on gas group or temperature class means the lamp cannot enter the zone.

Step 5: Confirm model coverage

One certificate often covers a family of models. Check the certificate's schedule of equipment. If your specific SKU is not listed, the cert does not cover it. Reuse of a certificate across different SKUs is the most common fraud pattern in Asian supply chains.

Why IP65 is Not Explosion Proof: The Overlap Table Buyers Keep Getting Wrong

The single most expensive buyer mistake on hazardous area projects is specifying "IP65" instead of the correct Ex rating. IP and Ex measure completely different risks.

What IP rating actually measures

IP rating comes from IEC 60529. It measures solid object and water ingress. IP65 means dust-tight and protected against low-pressure water jets. It says nothing about ignition energy, flame paths or surface temperature.

What Ex rating actually measures

Ex rating comes from the IEC 60079 series. It measures how the equipment prevents ignition of the surrounding gas. An Ex d IIC T6 lamp survives an internal explosion and keeps the surface under 85 C. An IP65 ordinary LED lamp can neither contain an explosion nor limit surface heat.

Overlap table

Marking on lamp	IP65 ordinary LED	IP66 + Ex d IIC T6
Dust tight	Yes (6)	Yes (6)
Water jets / rain	Yes (5)	Yes (6, stronger)
Internal explosion contained	No	Yes
Surface under 85 C	Not guaranteed	Yes (T6)
Allowed in Zone 1	No	Yes
Typical unit price	$20-40	$150-300

The price gap is 7-15x. That is exactly why buyers try to substitute. OSHA's 1910.307 treats the substitution as a willful violation. For outdoor Zone 1 work, the correct combo is IP66 plus Ex d IIC T6.

Cost and Timeline Reality Check: What a Real ATEX IECEx Certification Guide Tells You About Budget

Buyers new to Ex procurement often underestimate certification cost. A realistic budget per product line changes the supplier shortlist fast. The numbers below are typical, not fixed.

This is why a cheap factory quote from a no-name workshop should set off alarm bells. Without a Notified Body relationship, the certificate will not exist on delivery.

Activity	ATEX only	ATEX + IECEx	ATEX + IECEx + UL
Type testing fee	€5,000-8,000	€8,000-12,000	€15,000-22,000
Quality system audit	€1,500-3,000/yr	€1,500-3,000/3yr	€3,000-5,000/yr
Factory production inspection	Annual	Triennial	Semi-annual
Lead time to first cert	14-18 weeks	16-20 weeks	32-44 weeks
Typical small factory capability	Can handle	Usually can handle	Rarely has

How to read a supplier's certificate list

Ask for the certificate number, not a scan of a CE sticker. A scan can be photocopied. The number can be queried. Then follow the five-step verification SOP earlier in this guide.

For buyers working on a government tender, the compliance dossier matters as much as the product. The dossier packs the certificate, the test report, the quality manual and the nameplate drawing. Without it, the bid fails on a technicality.

Use this ATEX IECEx certification guide as a checklist. Walk your supplier through each step. If they hesitate on the database query, walk away.

What changes in the next ATEX revision cycle

The 2014/34/EU directive is stable, but the underlying harmonised standards roll forward. IEC 60079-1, IEC 60079-0 and IEC 60079-7 all see minor revisions every few years. Certificates reference the edition year on the face.

When a new edition publishes, existing certificates do not auto-expire. They remain valid until their stated end date. New production, however, must test to the new edition. Buyers signing a long-term supply contract should ask which edition year the next batch will test to.

Avoid suppliers who cannot name the edition year on their certificate. That gap usually means the document is older than they claim.

For buyers preparing a first-time tender dossier, collect the following in a single folder: the certificate front page, the schedule of equipment, the type test report cover, the quality manual index and the nameplate drawing. That one folder answers 90% of EHS reviewer questions.

If a supplier hesitates to provide the schedule of equipment, treat it as a red flag. The schedule is the document that proves your SKU is actually inside the certificate. Without it, the cert number is a meaningless string.

Frequently Asked Questions

What is the difference between an Ex d luminaire and an intrinsically safe lamp?
An explosion proof light (Ex d) contains an internal explosion inside a heavy enclosure. An intrinsically safe light (Ex ib or Ex ia) limits circuit energy so no spark or hot surface can occur at all. Cross-check the Ex marking using this ATEX IECEx certification guide.

What does Ex ib IIC T6 Gb actually mean?
Ex ib is intrinsic safety with one fault margin. IIC covers hydrogen and acetylene. T6 caps the external surface at 85 C. Gb is the EPL for Zone 1 and Zone 2 gas. This ATEX IECEx certification guide maps T-class to gas ignition.

Can I use a regular torch in Zone 2?
No. Zone 2 is still a classified hazardous area. Use a Gc or Ec rated lamp. Keep this ATEX IECEx certification guide beside the site dossier.

Which explosion proof light is allowed in Zone 0?
Zone 0 requires Ga EPL, almost always Ex ia intrinsic safety. Use this ATEX IECEx certification guide to pick the right lamp.

What is the difference between ATEX and IECEx?
ATEX is the European directive system with CE marking. IECEx is the international IEC 60079 scheme. Both test to the same clauses. This ATEX IECEx certification guide explains flameproof vs intrinsic safety.

Is an IP65 flashlight the same as an explosion proof light?
No. IP65 means dust and water ingress protection. It says nothing about ignition energy. Verify the certificate schedule with this ATEX IECEx certification guide.

Which gas group do I need for hydrogen service?
Hydrogen belongs to group IIC. Use an IIC rated lamp, which also covers IIA and IIB. This ATEX IECEx certification guide covers IIA IIB and IIC gases.

What does T6 mean for surface temperature?
T6 caps the maximum external surface at 85 C. It is the strictest common class. Reference this ATEX IECEx certification guide before Zone 0 selection.

Can one explosion proof flashlight certificate cover a searchlight?
No. Each model, battery and charger is tested as an assembly. This ATEX IECEx certification guide lists the 12-18 week test cycle.

Do Ex lights work in dust zones?
Only if the certificate explicitly includes dust scope. A gas Gb lamp is not automatically Db. Use this ATEX IECEx certification guide during factory follow-up.

What battery can I use in a certified Ex lamp?
Use only the exact battery pack listed on the nameplate and in the certificate. This ATEX IECEx certification guide clarifies the notified body steps.

How long does ATEX certification actually take?

From sample submission to certificate issue, plan 12 to 18 weeks. Type testing takes weeks 2-10. Quality system review takes weeks 10-14. Issue follows at weeks 14-18. Add another 16-24 weeks if you also need UL or FM for North America. This ATEX IECEx certification guide separates IP rating from Ex rating.

YRF supplies certified Ex lighting, intrinsically safe lamps and ATEX (EU) / IECEx (international) / UL (North America) rated ranges from China. Use this certification guide to match the right standard to your project destination. Specifications and certification scope are confirmed per order.

How does this ATEX IECEx certification guide map temperature classes to gases?
This ATEX IECEx certification guide links the T-class to gas ignition temperature. T4 covers most gases at 135 degrees C. Use T6 for low-ignition solvents. The Ex marking shows the exact class. Share this ATEX IECEx certification guide with the safety officer.

What is the difference between ATEX and IECEx per this certification guide?
This ATEX IECEx certification guide treats both as equivalent test systems. ATEX is the EU directive and IECEx is the global scheme. One test report supports both marks in most countries. This ATEX IECEx certification guide covers dust zones too.

How long does ATEX certification take according to this guide?
Per this ATEX IECEx certification guide, plan 12 to 18 weeks. Type testing takes weeks 2 to 10. The quality audit runs weeks 10 to 14. Add time for a factory follow-up visit. Use this ATEX IECEx certification guide to compare Ex e and Ex d.

Can one certificate cover a whole family of explosion proof lights?
This ATEX IECEx certification guide allows a family certificate for similar models. Each variation must share housing and temperature class. List every covered model on the certificate schedule. This ATEX IECEx certification guide supports approval sign-off.

Keep this ATEX IECEx certification guide beside your site dossier. This ATEX IECEx certification guide turns Ex marking, gas group and temperature class into a short approval checklist before you order.

Bookmark this ATEX IECEx certification guide before your next site survey. This ATEX IECEx certification guide helps a safety officer map each zone to the right lamp. Revisit this ATEX IECEx certification guide whenever a new gas group enters the plant.