The course + test
FREE No payment needed
- All 6 DSEAR: Dangerous Substances & Explosive Atmospheres modules
- Full English narration
- Online test and your score
- Retake the free test if you need to
No account. No card. No certificate included.
DSEAR: Dangerous Substances & Explosive Atmospheres
Free course + test.
Full course in line with HSE guidance. Free to learn.All 6 narrated modules and the online test included.
Learn on your phone, tablet or computer.
- Learn on any device
Learning + testFREEAll 6 modules included
Optional certificate£23£18PDF certificate
For your optional £18 certificatePass the free online test, then pay £18 for your PDF certificate. How the free test works
No account or card needed to learn. No obligation to buy.
Buying for a team? See team prices
Pass the free online test, then get your certificate.The optional £18 certificate is issued once you pass the online test and pay.
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Your free course
Your free course starts here.
Study all six modules and take the free final test.
6 MODULES + ONLINE TEST · FREEReady when you are.No account or payment needed.
Not finishing today? Save it for later.
Enter your email and we’ll remember every step. Come back any time and carry on exactly where you stopped.
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A clear choice
Free to learn.
A certificate if you need one.
You can finish the learning and online test without paying. The certificate is a separate, optional purchase.
How it works
From free learning to your certificate
- 01 · FREE
Learn and take the test
Six narrated modules and an online test. No account or payment needed.
- 02 · YOUR CHOICE
Need a certificate?
Pay £18 only if you want a certificate. It is issued once you have passed the online test and paid.
- 03 · IF CERTIFYING
After payment, download your certificate
Your PDF certificate is available in your account right after payment.
The course
What you’ll learn
Six short modules in a clear order, free to study, followed by a free 20-question online test.
- Module 1
Introduction and the Law
Dangerous Substances · Explosive Atmospheres · The Law in Great Britain · What ATEX Means
- Module 2
Fire and Explosion Basics
The fire triangle, the explosion pentagon, flammable range, dust explosions and ignition sources.
- Module 3
Dangerous Substances
Flammable liquids, gases, combustible dusts and oxidisers, flash point, labels and safety data sheets.
- Module 4
Risk Assessment
What the assessment must consider, the competent person, recording and review.
- Module 5
Control and Mitigation Measures
Reducing substances, controlling releases and ignition, hazardous area zoning and ATEX equipment.
- Module 6
Roles, Responsibilities and Emergency Arrangements
Employer Duties · Emergency Arrangements · Information, Instruction and Training · Recording the Findings
The certificate
What you receive
Your DSEAR: Dangerous Substances & Explosive Atmospheres completion certificate is issued by Safety Courses LLC after you pass the online test and pay. Download the PDF from your account, print it or send it to your employer.
- Assessment
- Free online test (pass mark 80%)
- Issued
- After you pass the test and pay
- Format
- PDF download from your account, plus a copy by email
- Shows
- Your name, the course and its curriculum, a validation code, and the starting and expiry dates
- Validity
- Your certificate carries a starting date and an expiry date 3 years later, which is the point we recommend you refresh. Your employer may set a shorter interval.
- Access
- Stays in your account for life — re-download any time, at no cost
Who it’s for
Who should take DSEAR: Dangerous Substances & Explosive Atmospheres
- ✓
Process & manufacturing
Sites handling solvents, fuels or combustible dust.
- ✓
Fuel & chemical storage
Depots, forecourts and chemical stores.
- ✓
Food & agriculture
Flour, sugar, grain and other combustible dusts.
- ✓
Maintenance & contractors
People working in or near hazardous areas.
Frequently asked questions
Is the whole course really free?
Yes. All 6 learning modules and the final online test are free. You can see your test score without paying. A certificate is not included in the free option.
What does the optional £18 payment cover?
It covers your PDF completion certificate, issued after you pass the online test. There is no subscription and no renewal charge.
Do I need an account or payment card to learn?
No. You can study the modules and take the free online test without creating an account or entering card details. An account is needed if you choose the paid certificate option.
How does the test work?
There are 20 multiple-choice questions and the pass mark is 16 of 20. The answers are marked instantly, and if you do not pass you can review the modules and retake it as many times as you need at no extra charge.
Will my employer accept this certificate?
The course is written for UK workplaces and follows UK health and safety law and HSE guidance. Requirements differ between jobs, so if you are training for a specific employer it is worth confirming with them that it meets their needs before you buy.
When do I get my certificate?
If you choose the paid certificate option, pass the online test and complete payment. You can then download your PDF certificate from your account.
Can I do the whole course on my phone?
Yes. The modules and the test work on a phone, tablet or computer.
What if the course is not what I expected?
Email us within 14 days of your purchase and we will refund you in full. You do not need to give a reason. This is our own guarantee, offered on top of your statutory rights rather than instead of them.
Are there any extra fees?
No. The course, the test and retakes are free. £18 is a one-off payment for the certificate, with no subscription and no renewal charge.
Still have a question? Contact our team.
For employersBuying for a team?See prices for your team.
Certification prices for teams. Learning and the online test remain free.
1–5 courses£18per certificate
6–10 courses£17per certificate
11–20 courses£16per certificate
21–49 courses£14per certificate
50–99 courses£13per certificate
100–199 courses£12per certificate
200+ courses£10per certificate
Get started
Start learning. Decide on a certificate later.
All six modules and the online test are free. Optional certification is £18.
Our 14-day guarantee & your cancellation rights
Our 14-day money-back guarantee. If you are not happy with your purchase, email us within 14 days and we will refund you in full. You do not need to give a reason.For your cancellation rights and purchase terms, read our Terms and Conditions. Learning and the online test do not require a purchase.
Course suitability & workplace training
This is online dsear: dangerous substances & explosive atmospheres training. It supports — but does not replace — your employer’s risk assessment, instruction and supervision for the work you actually do. Your employer decides what further training your role needs.
For the law behind this course, read S.I. 2002/2776 (DSEAR) .