The best breathalyzers in the UK 2023

Although breathalyzers are no longer mandatory when driving, they are still a safety measure that can save lives. Indeed, excessive alcohol consumption causes 30% of fatal accidents in the UK. So, if you don't have a breathalyzer yet, it's time to buy one. By browsing through our buying guide, you will find our advice and a comparison of the best breathalyzers of the moment.

BLO portable breathalyzer 1

Editor's Choice

BLO portable breathalyzer

The best breathalyzer in 2021

With this digital breathalyzer, a young driver can quickly check his blood alcohol level after a drunken night out. Afterwards, he can choose between driving or being driven home.

31,99 £ on Amazon

The operation of this electronic breathalyzer is based on very sensitive semi-conductor sensors. These sensors emit an alarm when the blood alcohol level is exceeded. To find out the blood alcohol level, you have to blow into the mouthpiece for 5 seconds and wait until the results in BAC (blood alcohol concentration) appear on the LCD screen. Above 0.50 BAC, the driver must not drive. This BLO breathalyzer has been made very compact so that all drivers can take it with them in their bags or in the glove compartment. It comes with a protective cover, and 10 clear BPA-free mouthpieces.

Turdus FreeDrive Chemical Breathalyzer 2

The best cheap

Turdus FreeDrive Chemical Breathalyzer

The best entry-level breathalyzer

This chemical breathalyzer signed Turdus is undoubtedly the easiest to use on the market. You just have to blow inside the tube and observe if the content changes color. It's hard to make it simpler!

1,70 £ on Cdiscount

All the information you need to use this chemical breathalyzer is mentioned in the instructions provided. Among other things, you will find the manual for the use of the tube and the color charts which will allow you to know your blood alcohol level at the time of the test. Remember that this chemical breathalyzer is for single use only. As for its validity, it is estimated at 24 months. To avoid erroneous or altered results, avoid storing this device in a place over 40°C. Of course, you must keep the test in its packaging until the time of use. According to the manufacturer's instructions, the blood alcohol measurement is validated between 2 and 10 minutes.

ACE AF-33 Electronic Breathalyzer 3

The best high end

ACE AF-33 Electronic Breathalyzer

The best high-end breathalyzer

Compact and easy to use, this electronic breathalyzer with digital display will allow you to know your alcohol level accurately whenever you need to know.

88 £ on Amazon

The ACE AF-33 is the ultimate in electronic breathalyzers. We appreciate its compact size and its sober but refined design. A real concentrate of technology, this device will allow you to check your blood alcohol level in the blink of an eye. To do so, you just have to turn it on, let the countdown pass and wait until the device is ready to use. Then, blow into the mouthpiece until the sensors have finished the necessary analysis. Caution! Never interrupt the test before the audible click is heard. Normally, the results appear in less than 60 seconds. The ACE AF-33 stores up to 10 test results and measurement times.

Set of 2 Simplex Health breathalyzers 4

The best breathalyzer for young drivers

Set of 2 Simplex Health breathalyzers

The best single-use breathalyzer

Very simple to use, this set of 2 chemical breathalyzers will allow you to control your blood alcohol level easily and quickly. Indeed, it delivers the results after only 3 to 4 minutes.

4,39 £ on Amazon

So that you can control your blood alcohol level at any time, Simplex Health proposes this batch of 2 single-use chemical breathalyzers. The 2 tubes fit in a pouch that can be placed in a handbag or glove compartment. If needed, you just have to take out the test and push the 2 ends of the tube together in order to break the security film. Then breathe in deeply and breathe out into one side of the tube for 10 seconds. Repeat this process twice. The results should appear after 4 minutes. All you have to do is compare the color of the crystals in the tube with the color chart on the packaging. Note that this certified product can be used in the UK, Germany, England and Poland.

Buying guide • November 2023

Best breathalyzer

Any specific needs?

The best breathalyzer in 2021

The best entry-level breathalyzer

The best high-end breathalyzer

The best single-use breathalyzer

Your guide : Samuel

Rate this buying guide :
0/50 votes

By rating this buying guide, you are helping us to reward our best writers. Thank you!

Comparison table of the best breathalyzers

BLO portable breathalyzer 5
Turdus FreeDrive Chemical Breathalyzer 6
ACE AF-33 Electronic Breathalyzer 7
Set of 2 Simplex Health breathalyzers 8
BLO portable breathalyzer
Turdus FreeDrive Chemical Breathalyzer
ACE AF-33 Electronic Breathalyzer
Set of 2 Simplex Health breathalyzers
With this digital breathalyzer, a young driver can quickly check his blood alcohol level after a drunken night out. Afterwards, he can choose between driving or being driven home.
This chemical breathalyzer signed Turdus is undoubtedly the easiest to use on the market. You just have to blow inside the tube and observe if the content changes color. It's hard to make it simpler!
Compact and easy to use, this electronic breathalyzer with digital display will allow you to know your alcohol level accurately whenever you need to know.
Very simple to use, this set of 2 chemical breathalyzers will allow you to control your blood alcohol level easily and quickly. Indeed, it delivers the results after only 3 to 4 minutes.
Type of breathalyzer
FN certified
Total test time
A few minutes
2 to 10 min
Quick minutes
4 min
One-time use
Product advantage
This device runs on batteries. It comes with 10 hygienic tips.
Very easy to use and guaranteed for 24 months.
This breathalyzer comes with batteries, 6 tips and 1 carrying case.
Delivered with instructions in multiple languages.

Help us improve this table:
Report an error, request the addition of a feature to the table, or suggest another product. Thank you for your kindness!

Buying guide - breathalyzer

Primary Item (H2)Sub Item 1 (H3)

Why can you trust us?

Why you can trust us
Our mission
How to support us
We do NOT accept any sponsored posts or advertising.

We spend thousands of hours each year studying the major specialized websites, analyzing products of hundreds of brands and reading user feedback to advise you on the best products.

Our mission is to simplify your purchasing decisions.

We are a product review company with a single mission: to simplify your buying decisions. Our research and testing helps millions of people every year find the best products for their personal needs and budget.

We are a small team of geeks and enthusiasts.

To support us you can: use our links to make your purchases (which often earns us a small commission), share our articles on social networks, or recommend our site on your blog. Thanks in advance for your support!

How to choose your breathalyzer

A breathalyzer is never chosen at random. For a reliable and efficient measuring tool, here are the criteria to take into account:

#1 - The type of breathalyzer

Motorists will have to choose between the chemical breathalyzer and the electronic breathalyzer. First of all, we would like to point out that the chemical model is for single use only. You must therefore throw it away after using it. As for the electronic breathalyzer, it can be reused several times and is very fast. One thing is certain: these two types of breathalyzers are equally accurate. You are free to choose the one that best meets your expectations.

#2 - The reliability of the breathalyzer

The best breathalyzers on the market are those certified by the NF X 20 704 standard. This identification clearly attests that the device complies with all safety requirements. This standard therefore testifies to the proper functioning, quality and legal compliance of the device. By choosing an NF certified product, you are assured of using a breathalyzer that has undergone thorough testing from an approved certifier.

#3 - The accessories provided with the breathalyzer

The best breathalyzers come with a set of accessories, including a protective cover, replacement mouthpieces, batteries, a rechargeable battery, a charger, a USB cable and even a cigarette lighter adapter. Some come with an automatic function and a memory function for the tests performed.

#4 - The speed of the measurement

As the breathalyzers on the market each have their own specificities, the time at which the results are displayed varies greatly. For high-end products, it takes less than a minute to perform the test. On entry-level products, the results are displayed only after two or three minutes.

#5 - The size

The breathalyzer should be neither too big nor too small to avoid wasting time looking for it in case of a road check by the police. Even if you choose a disposable model that comes in a soft plastic container, make sure it is always handy and prominently displayed in the glove compartment.

How to use and interpret the results of a breathalyzer

Drunk driving is the main cause of traffic accidents, not only in the UK, but anywhere in the world. To make motorists more responsible, they must have a functional breathalyzer in their car.

Thus, after having had a few drinks, a driver must check his alcohol level or that of his friend. If the authorized blood alcohol level is exceeded, measures must be taken. It is not difficult to read the results of a breathalyzer.

For the chemical breathalyzer

If you are using a chemical breathalyzer, you must break the ends of the plastic tube before using it. You must take a deep breath and blow to inflate the balloon in one exhale. Then deflate the balloon so that the contents can pass through the chemical reagent in the mouthpiece. If the yellow crystals in the tube do not change color, the test is considered negative. Alternatively, if the crystals turn green, it is more responsible to leave the wheel to someone else.

For the electronic breathalyzer

The electronic breathalyzer works in much the same way as the chemical model. You place a disposable mouthpiece on the device and blow into it until the device emits an audible or visual signal. The alcohol level will then be displayed on the screen. If it is higher than 0.5 g/L (or 0.25 mg of alcohol per liter of exhaled air), it would be more prudent to take a cab home.

The limits are quickly reached with drinking and driving

As we keep saying, the majority of fatal accidents are due to drunk driving. Note that the body needs one hour to eliminate the equivalent of one glass of alcohol in the blood. If you drink a lot of alcohol, the chances are high that you will exceed the legal blood alcohol level. At 0.5 g/L, alertness decreases, the visual field narrows, distance perception is blurred and reaction time increases. According to the authorities and health specialists, a motorist should never consume more than 2 glasses of alcohol.

The different types of breathalyzers

Breathalyzers are distinguished by the sensors that embed different technologies. On the market, there are 3 types:

The chemical breathalyzer

Also known as a balloon breathalyzer, this device consists of a solid chemical reagent (potassium dichromate) in the form of crystals that change color upon contact with ethanol molecules.

- This device is inexpensive
- The results are very fast

- It is a single use device
- The shelf life is approximately 2 years
- It does not quantify the precise blood alcohol level

The electronic breathalyzer

This device uses an oxide sensor to measure the reactivity between the metal oxide and the alcohol molecules in the exhaled air. Thus, when the alcohol molecules come into contact with the metal oxide, the conductivity changes according to the concentration of the gas detected in the breath.

- This device is compact.
- It presents excellent performances for low concentrations
- Its power consumption is low.

- This device performs poorly if the human breath flow is low.
- High temperature and humidity can affect the performance of the sensor.
- The risks of false positive, because the device does not detect the residual alcohol present in the mouth.

The electronic breathalyzer with infrared spectroscopy

Contrary to the other two types of breathalyzers, the present model is equipped with an infrared spectroscopy which is the technology having the same legal metrology as a blood test.

Advantages :
- Its effectiveness is indisputable.
- It is the only device capable of detecting residual alcohol in the mouth, trachea and esophagus.
- The longevity of the sensor is almost infinite.

- The cost of the sensor is expensive due to its advanced technology.


A breathalyzer is completely different from a breathalyzer. While the former is an over-the-counter device intended for motorists and certain employers, the latter is the accessory used by law enforcement agencies to check the blood alcohol level of people suspected of driving while intoxicated.

Conventional breathalyzer or ignition interlock?

Classic breathalyzer

Whether chemical or electronic, the breathalyzer is a mobile device that allows you to check the level of alcohol in your breath. When in doubt, a motorist or a motorcyclist must perform a breathalyzer test. It is a responsible gesture intended to ensure his safety and that of the other users of the road.

Ignition interlock device

The alcohol ignition interlock device or EAD is an on-board electronic device that prevents the car from starting if the alcohol level measured in the breath is above the authorized threshold. Technologically advanced, the alcohol ignition interlock is one with the car.


The use of an alcohol ignition interlock device is often the result of a decision by the prefect. It is an alternative to license suspension. So, if you have not yet violated the rules of driving with a higher alcohol level in your blood, just make sure you have a breathalyzer in your car.

5 good reasons to buy a breathalyzer

One drink is fine, but three drinks can cause damage! This adage is still true today since the share of alcohol in fatal accidents has not changed despite decades of prevention. Basically, the reasons to buy a breathalyzer revolve around this subject.

It is an essential safety accessory
All French motorists are no longer required to have a working chemical or electronic breathalyzer in their car since 2020. However, always have one for your safety and that of your family. You will know that this accessory is very useful, especially after a drunken night with friends.

It's for your well-being and that of others
For safety reasons, it is wise to have a breathalyzer in your car. In the spirit of clarity, this device will prevent you from risking your life by getting behind the wheel when you shouldn't. If the indicators show that your blood alcohol level is above the legal limit, don't drive. Instead, take a cab or get a ride home.

A friend may need one
A breathalyzer is still useful even if you haven't had a drop of alcohol. The device could be useful for the friend who has had too much to drink and can't remember where they put theirs. If your friend doesn't pass the test, it is your duty to refuse him or her the wheel. Always be rational, especially since alcohol causes thousands of deaths each year.

To drive with peace of mind
Implicitly, the presence of a breathalyzer in your car will remind you of your responsibility towards others. You'll be able to drive with peace of mind because you're fairly alert, even after you've had a drink. If you feel any effect, take out your breathalyzer and use it.

You will understand your body better
Using a breathalyzer will give you a better understanding of your body. You will know how your body reacts after having 1, 2 or 3 drinks. From now on, you will know what to expect.

The best brands of breathalyzers

In our opinion, the best brands of breathalyzers in 2022 are :


BLO UK is an English manufacturer specialized exclusively in breathalyzers. Although it is still little known, this brand offers NF certified products that will be useful in your daily life.

VicTsing is a brand expert in creating high-tech devices useful in everyday life. Its range of breathalyzers is especially known for their performance and practicality.

Topelek is a key player in the solar lamps and computer accessories sector. With a strong know-how, the brand also offers practical and very reliable breathalyzers.

Specialized in road safety accessories, Patuoxun offers a rich range of breathalyzers that seduce by their ergonomics, but also by their design.

Norauto is a French automotive service center whose origins date back to 1970. Taking advantage of this long experience, the company started offering safety accessories, including chemical and electronic breathalyzers.

What is the price for a breathalyzer

The diagram below will help you to get an idea of the typical prices for each price range (entry-level, mid-range and high-end).

However, more expensive does not necessarily mean better.

We therefore advise you to always consult our ranking before deciding, rather than blindly relying on price ranges.

3 £ to 30 £
30 £ to 99 £
more than 99 £
Price range diagram


Check the expiration date

If you plan to buy a single-use breathalyzer, remember to check its expiration date, but also if it is NF certified. This way, you will be sure to use a quality product for at least 24 months. If you have any concerns, switch to another model.

Prepare the tube properly

When using a chemical breathalyzer, be sure to break off the plastic tips so that you can blow air into the device. Normally, the kits are easy to break off. All you have to do is apply a little pressure to both ends and you're done.

Pull the white crystals

To avoid repeating the process, remove the white crystals that are in the tube. These substances are only there to preserve the product. However, this operation is useless if you have to blow directly into the device, as is the case with the electronic breathalyzer.

Take a deep breath

Fill your lungs with air before blowing into the device. This will allow the balloon to inflate properly. When it's full, close the valve and gradually empty the container. The goal is to get the air into the crystal tube or sensor to find out the alcohol level.

Have 2 breathalyzers in the car

For single-use breathalyzers, it's a good idea to have several in your car. If you screw up the first test, you can always make up for it with another one. This is also very useful if you have been drinking with a lot of people. The person with the lowest alcohol content will be responsible for driving the others home.


How does a breathalyzer work?

Whether it is chemical or electronic, a breathalyzer always works the same way. After blowing into the device, a driver is informed of the amount of alcohol in his or her blood. If the level is higher than 0.50 g/L, he or she is strictly forbidden to drive, at the risk of being arrested.

How do you know when a breathalyzer is positive?

For the chemical test, the test is negative in case the crystals do not change color. If they turn green, it means that you have exceeded the authorized threshold. The electronic test is easier to interpret and simply shows you the level of alcohol in your blood.

What is the difference between a breathalyzer and a breathalyzer?

Thebreathalyzer is the detection device used by law enforcement to confirm the level of alcohol in your blood. It is therefore an authorized device in a legal proceeding, which is not the case with the breathalyzer, which is a free product for sale.

Is a breathalyzer mandatory in a car?

From 2013 to 2020, thebreathalyzer was a mandatory accessory in the car although its absence did not always result in a fine. Despite this, many organizations encourage motorists to have one in the glove compartment. It is a way to make them aware of the dangers of drinking and driving.


Note: Below are some of the sources we have consulted in writing this article. Links to other sites are not continuously updated. It is therefore possible that a link may not be found. Please use a search engine to find the desired information.
  1. How to use a breathalyzer properly ?,
  2. How to use a breathalyzer ?,
  3. Ethylotest (EAD) : alternative to the suspension of the license - Medical visits of the driving license,
  4. The breathalyzer an alternative to the withdrawal of license,
  5. How to choose a breathalyzer ?,
  6. Everything you need to know about the breathalyzer.,
  7. How and why to read a breathalyzer ?,
  8. BAC level : how to use a breathalyzer ?,
  9. Ethylotest : the guide. How to use it ? Regulations ? Alcohol and driving ?,
  10. Ethylotest - Wikipedia,
  11. Everything you need to know about breathalyzers - Passeport Sante,
  12. Ethylotest - Electronic and disposable breathalyzers - Feu Vert,
  13. Ethylotest Electronic breathalyzers | NORAUTO,
  14. Ethylotest : functioning legislation price of a breathalyzer ?,
  15. Ethylotest to measure its blood alcohol level,
  16. Ethylotest approved to order online,
  17. : ethylotest electronique,
  18. Your search : ethylotest - Darty,
  19. L'é des éthylotests personnalisables sans ...,
  20. : ethylotest,
  21. | Manufacturer of Ethylotest without balloon & for Use ...,
  22. Sale Ethylotest NF mandatory Reliable approved ...,
  23. Chemical Disposable Ethylotest standard NFX20-702,
  24. Definition | Ethylotest - Ethylometer - Alcohol test | Futura ...,
  25. Chemical Ethylotest nf: customized disposable ethylotests ...,
  26. Chemical Ethylotest Alcopass single use,
  27. Ethylotest - Manutan....,
  28. Ethylotest : ethylotest |,
  29. Where to buy an ethylotest ? | Road safety,
  30. Alcootest & ethylotest : electronic & disposable breathalyzer ...,
  31. Employer and ethylotest : can you control the ...,
  32. ethylotest - Wiktionnaire,
  33. Contralco specialist in single-use ethylotest,
  34. ,
See more


March 2022 : Translation of this buying guide from our partner

See more
Our selection
BLO portable breathalyzer 9
BLO portable breathalyzer
Turdus FreeDrive Chemical Breathalyzer 10
Turdus FreeDrive Chemical Breathalyzer
ACE AF-33 Electronic Breathalyzer 11
ACE AF-33 Electronic Breathalyzer
Set of 2 Simplex Health breathalyzers 12
Set of 2 Simplex Health breathalyzers


Every month we help more than 1 000 000 people buy better and smarter.

Copyright © 2022 - Made with by

Your reviews and buying guides 0% advertising, 100% independent!