Upgrade to AlcoSense Pro from £109.99

"Auto Express Magazine Recommended 2018 & EVO Magazine Commended 2019"
At its price point, the AlcoSense Pro is arguably the most advanced breathalyzer on the market. The culmination of 3 years of research and development, the AlcoSense Pro (and its bigger brother, the Ultra) take accuracy, features and ease of use to a new level. Red Dot Design Award Winner.


Upgrade to AlcoSense Pro from only £109.99

Before returning your unit from the EU to the UK please read this information

*Once purchased return your unit and include your order number*

As a special thank you to existing AlcoSense customers we’re offering you the chance to upgrade to a higher model at a reduced price! You simply trade in your existing AlcoSense against another model, and pay the difference. Your existing breathalyser can be in any condition, working or not. 

Use the table below to see how much you  can save by trading in your old unit. 

Model to Trade in Trade in ValueNormal Price of ProPrice You Pay for Pro After Trade In
Lite 2£25£149.99£124.99
Elite 3£30£149.99£119.99

How it works:

1)      Select the model you currently own from the drop down list on the right of the page, check the price and then proceed to the checkout and we will send you an order confirmation email.

2)      Once you have checked out just send your existing breathalyser back to us with a print out of your order confirmation email. Your new breathalyser will be despatched within 2 working days of us receiving your old breathalyser.

Frequent asked questions:

Do I need to send back the box and accessorises?
No, we can just accept the breathalyser back on its own.

What condition does the breathalyser need to be in?
It doesn’t matter – it doesn’t even need to be working.

How long does it take to complete the trade in?
We will despatch your new breathalyser to you within 2 working days of receiving your old one. 


Return Address: 
Now Group UK Ltd Unit 3, 
Maidenhead Enterprise Centre 
Off Cordwallis Street 
Maidenhead, Berks, 
SL6 7BE 
TEL: 0800 634 4480 


Auto Express 2016 Recommended"Spend £50 more than on the Excel, and you get quite a bit extra... It topped our accuracy tests... look no further than the AlcoSense Pro."


AlcoSense Pro Fuel Cell Breathalyser


Pro at a glance:

  • 121mm2 Fuel Cell Sensor – smaller version of Police sensor
  • More than twice as accurate as award winning AlcoSense Elite
  • Time until Sober & Retest alarm
  • Selectable database of all drink drive limits worldwide
  • Blow Coach making it extremely easy to use
  • Winner – 2016 Red Dot Product Design Award

At its price point, the AlcoSense Pro is arguably the most advanced breathalyzer on the market. The culmination of 3 years of research and development, the AlcoSense Pro (and its bigger brother, the Ultra) take accuracy, features and ease of use to a new level.

Designed from the ground up by AlcoSense in the UK with Patented new features, the Pro packs the punch of a breathalyzer twice its price and brings near Police accuracy into the reach of the consumer.

Professional Accuracy

Pro by name, pro by nature. It uses a 121mm² professional Fuel Cell sensor, identical to its 200mm² big brother used in several UK, US & European Police Breathalyzers – and in the AlcoSense Ultra. This gives the Pro unrivalled accuracy at this price point and accuracy of almost twice the AlcoSense Elite.

pro sensor

Advanced Sampling System with Temperature Compensation

The AlcoSense Pro features an advanced sampling system to ensure that only deep lung air (the most accurate part of the breath) is measured. It uses advanced sensors to measure the blow pressure, flow rate and volume of breath exhaled and takes a reading when 1 litre of air has been exhaled, ensuring the most accurate sample is always taken. To improve accuracy even further, readings are fine-tuned according to temperature. These sensors also allow the Pro to get clever with BlowCoach™

Alcosense Pro


Most issues while doing a breath test are caused by either blowing too hard, too soft or not for long enough, and with some products this can also cause inaccurate results. BlowCoach™ is a Patent Pending technology from AlcoSense which makes it simple to do the perfect test every time!

The Pro shows you real-time on screen feedback of how you’re blowing. All you need to do is keep the top pressure bar in the middle, and keep blowing until the bottom volume bar is full.

Blowing too softly Blowing at too softly
Blowing correctly Blowing correctly

Should you get it wrong, this is where the Pro gets really clever. Using it’s on board sensors the Pro diagnoses exactly why the test failed and gives you tailored tips so you can quickly get it right next time.

Blowing too hard

BlowCoach™ dramatically reduces the learning curve of using a breathalyzer and makes operation simple.

Eliminating Under-Reading

Every breathalyzer has an accuracy tolerance of +/- X.XX of the reading – the smaller the number the more accurate the breathalyzer claims to be. The AlcoSense Pro has some clever software to eliminate the downside – i.e. instead of having a tolerance of +/-0.1‰BAC, the AlcoSense Pro’s tolerance is +0.10‰BAC, -0.00‰BAC. This means the Pro will read a little on the safe side, not too low and more than twice as accurate as the award-winning AlcoSense Elite.

Screen shots AlcosensePro

Any Limit in the World – Literally

At a click of button the AlcoSense Pro will work with any limit, anywhere in the world! Just select the country/region you’re driving in from the menu and using AlcoSense’s patent pending technology the Pro sets every up for you according to the local legislation. It sets the limit, unit of measure and blood breath conversion ratio to allow accurate readings in either blood alcohol or breath alcohol. Should a limit change the unit can be updated through a software download from our support section. Ideal for cross border or even cross continent travel.

AlcosensePro choose country

If you want to set your own self-imposed limit, for example maybe half the drink drive limit, you can do that too! Just select “Limit” from the main menu to adjust it to the limit you desire.


Award Winning Product Design

The AlcoSense Pro and Ultra won the prestigious 2016 Red Dot Award for Product Design. The Red Dot Design Award is an international product design prize awarded by the Red Dot Design Museum in Essen, Germany. In 2016, a total of 5,216 products were assessed for the award by a jury of 41 independent design professionals. Past winners of the award include Apple in 2001, BMW in 2007, LG in 2008, Porsche Design in 2012, Lenovo in 2013, Bose in 2014 and Dell in 2015. You can find out more by clicking here.

Red Dot Design Award Winner 2016

From the ground up, the product design communicates the AlcoSense Pro's core values of simplicity and precision. 

Detailed, Easy to Understand Results

AlcoSense Pro features a full colour 1.8 inch (48mm) TFT screen which gives clear and detailed readings of your alcohol level in your choice of breath (mg/L or µg/100mL) or blood (%BAC or ‰BAC) readings. If you’re close to or over your chosen limit the Pro will alert you not to drive.

No alcohol No alcohol
Up to 80% of the limit Up to 80% of the limit
Close to or over limit Close to or over limit

Time Until Sober & Retest Alarm

AlcoSense Pro will even calculate how long it may take until you’ll be sober and show it with your results, see screen shots above and below. Want to have a reminder to re-test again later? No problem, just press the alarm icon and the Pro will alert you to retest again later.

Sober in time shown with results, press the bell icon to set a re-test reminder Sober in time shown with results, press the bell icon to set a re-test reminder
Easily adjust when the timer will remind you to re-test Easily adjust when the timer will remind you to re-test

Memory Recall

The Pro will store 128 test results with both the date and time of the test.

Backlit “Twin” Blow Tube Receptor

The Pro features a backlit blow tube receptor so it’s easy to put a blow tube even in low light. The Pro works with both the “Pro” mouthpieces which feature a one-way valve to eliminate contamination from previous tests for ultimate accuracy, or the “regular” blow tubes used by the AlcoSense Lite and Elite.

Pro Backlit

Re-Calibration Alert

Any breathalyzer requires re-calibration after a period of use, the AlcoSense Pro has an industry leading calibration period of 12 months from the first time you use it. To improve reliability and user friendliness AlcoSense Pro reminds you to recalibrate after 11 months of use. When calibration expires just post it to us and we will recalibrate it using Police spec Breath Alcohol Simulators and return it to you within 5 working days.

Temperature Alerts

If a breathalyzer is used outside its operating temperatures you can get erroneous readings due to temperature affecting the quality of the reaction inside the sensor. For your safety and protection AlcoSense Pro will alert you if the unit goes outside its operating range (note the operating temperature is the temperature of the unit, not the surrounding air temperature) of 5°C~40°C. This means that, unlike rival brands, the Pro will never let you perform a test when you could get an unreliable result.

Saturation Protection

Unlike rival brands, AlcoSense Pro also protects you from inaccuracy caused by “Sensor Saturation”. Sensor Saturation can affect any breathalyzer, including Police units and is caused when extremely high levels of alcohol are blown directly into the sensor. Normally this happens when a breath test is performed shortly after drinking when alcohol is still present in the mouth, the sensor can be overloaded, known as “saturation”. Readings taken after a saturation event can be unreliable until the sensor recovers. For your safety and protection, rather than allowing potentially unreliable readings to be shown, AlcoSense Pro will enter a protection mode which allows the sensor to recover before allowing further tests.

Quality & Reliability Assured

The AlcoSense Pro is manufactured under ISO13485 conditions, the benchmark in medical device quality systems. After calibration, each unit is then tested 3 times for accuracy before leaving the factory meaning that the Pro is a device you can rely on.

pro quality

Additional Information

Suitable forConsumer Use, Workplace Use
AwardsAuto Express Recommended 2016, Red Dot Product Design Award 2016
Certified StandardISO13485
Product Accuracy+0.10‰BAC, -0.00‰BAC
Sensor TypeFuel Cell
Sensor Size (mm²)121 mm²
Police SensorSmaller version of exactly the same fuel cell sensor used in several UK, US and European Police breathalysers
Breath Sampling SystemAdvanced
Don't Drive Alert When Close to LimitYes
Adjustable Don’t Drive Alert LevelAdjustable - Pre-Loaded Database of Worldwide Limits
Features - Ease of UseBacklit Mouthpiece Receiver, BlowCoach - live on-screen blowing feedback, Don't Drive Alert When Close to Limit, Re-Calibration Reminder, Re-Test Alarm, Shows Estimated Time Until Sober, USB Port for Updates & Improvements
Features - AccuracyBreath Sampling Sensors, Sensor Overload Protection, Sensor Purge for Better Accuracy, Temperature Compensation
Unit of Measure%BAC (Blood Alc), mg/L (Breath Alc), µg/100mL (Breath Alc), ‰BAC (Blood Alc)
Reading DetailUp to 3 decimal places
Max Reading (‰BAC)4.0
Test Memory128 tests with date and time stamp
Screen Size (Diagonal)48mm
Screen TypeFull Colour TFT
Mouthpiece TypeBlow Tubes, Professional Mouthpieces
Re-Calibration Period12 Months
Re-Calibration Cost£29.99 inc VAT
Expiry Date2 Years from Manufacture (may be slightly shorter on delivery)
Product DimensionsNo
Product WeightNo
In The Box1 x Breathalyzer, 3 x AAA Batteries, 5 x Professional Mouthpieces, Instruction Manual, Micro USB Cable
Warranty12 Months (Register your unit for 3 years)
Media Reviews

Media Reviews

Evo Group Test Commended Logo

Group Test Runner Up
(AlcoSense Excel 1st - AlcoSense Pro 2nd)

26th April 2019

Rating: ★★★★

"It [the AlcoSense Pro] topped our accuracy test ahead of the AlcoSense Excel. AlcoSense is the clear industry leader: we suggest you pick the one that matches your budget. The Excel offers an excellent mix of price and performance - but if you can afford it, buy the Pro."

Read the full article here

March 2018

Rating: ★★★★

The AlcoSense Pro came second to the AlcoSense Excel in the 2016 Auto Express breathalyser Group Test, featuring ten breathalysers from 6 different brands! Testing under lab and real world conditions they concluded:

"Spend £50 more than on the AlcoSense Excel and you get quite a bit more with the Pro. It topped our accuracy tests by a small margin from the Excel. For the next step up, look no further than the Pro."

Read the full article here

"The AlcoSense Pro and Ultra have been awarded the international distinction of the Red Dot Award for exceptional product design against competition from multinationals including, Dell, Lenovo, LG, Apple, Logitech and many more. A total of 5,214 products from 57 nations were assessed by a jury of 41 independent designers, design professors and specialist journalists to decide the winners of the 2016 Red Dot Product Design Award, with the AlcoSense Pro and Ultra breathalysers winning the “Red Dot Award: Product Design”.

Red Dot has been an internationally recognised design award since its inception in 1955 and is recognised as a quality label for excellent product design. Past prize-winners include Siemens in 1995, Apple in 2001, BMW in 2007, LG in 2008, Porsche in 2012, Lenovo in 2013, Bose in 2014; and Dell in 2015.

Designed in the UK, the AlcoSense Pro & Ultra are the culmination of 3 years R&D and reflects AlcoSense’s values of simplicity, functionality and precision. The result is a breathalyser with near Police level accuracy and several patented innovations which bring a level of performance & ease of use previously unseen in the industry.

The product’s external design also impressed the jury by reflecting these values in a refined the external form with precise split lines and slide action with hidden mechanism, invisible battery compartment and backlit mouthpiece hole for use in low light conditions."

Sunday Times Breathalyzer Review

Rating: ★★★★★

The test involved using a machine to pump vapour from a solution of alcohol and water (using a human test subject introduces inconsistencies) into a Draeger police evidential breathalyser, which is used at police stations (they offer an industry-best ±0.03‰ BAC), and immediately after running the same test with the Pro.

The results: 

  • Draeger Alcotest 9510: 0.312mg/l
  • AlcoSense Pro: 0.32mg/l

The AlcoSense Pro got impressively close to the benchmark police evidential breathalyser. 

In addition, helpful features of the Pro include colour-coded results (red being over the limit), a backlit tube connector, the amusingly-named BlowCoach (shows in realtime whether you're blowing too soft or hard to get an accurate reading), and a handy Time Until Sober reading.

The Pro also works abroad as it includes a database of legal limits in various countries/regions — you simply tell it where you are and it'll do the rest.

the AlcoSense Pro appears to be a good investment for any law-abiding driver, especially during the Christmas party season, to make sure you're not caught out the morning after. The alternative could ruin your life.

Rating: ★★★★★

Read the full review here.



 Telegraph Review of the AlcoSense Pro

"...a fresh level of accuracy in consumer breath-testing."

“It’s very straightforward to use…. to get the same features as the Pro you’ll have to pay approximately twice as much.”

“Its accuracy was proven in a demonstration in our office comparing an AlcoSense pro against a correctly calibrated, Home Office-approved breath alcohol simulator. Reassuringly, the Pro passed with flying colours.”

Read the full review here.



Financial Times Breathalyser Review

8th July 2017

“A failsafe breathalyser for the international traveller”

Read the full review here

AlcoSense Pro - AutoExpress Hot Kit


10th February 2016

"The sleek Alcosense Pro is handy and simple to use, with a high-spec fuel-cell sensor that gives almost the same accuracy as police kit. The sensor has accounted for a 10 per cent tolerance, to prevent giving an under-reading. It also helps control breath flow, so you don’t breathe too hard, too softly or not long enough – all explained on the hi-res colour TFT screen. If you’re over the limit, it’ll advise how long to wait until you’re sober. EXACTLY when are you safe to drive again the morning after a night out drinking? There’s no real certainty, so investing in a personal breathalyser is one way to be sure."




The Sun Motors Breathalyzer Review


"Alcosense Pro is a top-of-the-range model and offers reliable accurate readings, which could prove priceless... As far as breathalysers go, this is one of the best"

Read the full article here



The Guardian Breathalyzer Review

"Designed in the UK, both breathalysers offer levels of accuracy, reliability and consistency that we as consumers have not been able to access until now."

"The units have several excellent features. They are pre-loaded with all the different limits in every country, so if travelling in Europe, for instance, you wouldn’t be caught out by different levels when crossing borders. Also, they feature an ‘estimated time until sober’ with an alarm that alerts you to re-test again when it is likely you will be safe to drive. The AlcoSense Pro costs £129.99 (£149.99 from February 2016) and the Ultra is £249.99 – which isn’t cheap but considering the alternatives could be a bargain."

Read the full review here.



Scottish Sun Breathalyzer Review


"An AlcoSense Pro breathalyser could be the smartest gift you buy this year. The Pro knows it is in Scotland, knows the limit and can even tell you when you can next drive. It uses a 121mm2 version of the 200mm2 “Fuel Cell” sensor used in several UK police forces. That sounds technical but this machine even gives you a lesson on how to give a breath sample properly with its BlowCoach mechanism. It doesn’t get any easier than that. — so there are no excuses for being over the limit."

Read the full review here.



18th May 2017

Rating: ★★★★★
Winner: Recommended Award

“AlcoSense Excel and Pro review: Are these the best breathalysers in the business?”

“Yes. The AlcoSense Excel and especially the Pro are great products. They’re easy to use and packed with thoughtful features and, most importantly, they’re accurate. But is it worth your while spending up to £150 on one? … Absolutely. These devices will tell you unequivocally and, with absolute clarity, if you’re okay or not to drive.”

Read the full review here


10th October 2017 Issue

“We’ve seen some pretty flashy breathalysers in our time. But with features like the Blow Coach and Time Until Sober, this one really does take the whole bloody biscuit tin.”

Read the full review here.

Diesel Car AlcoSense Pro Breathalyser Review

"We pitched the AlcoSense Pro up against the police evidential tester and it was absolutley spot-on for accuracy, every time. It's a neat little piece of kit too, small enough to slip into a pocket, smooth-looking and easy to use."

DieselCar Magazine, May 2016 Issue


Read review here


“One of the most advanced breathalysers around for its price. It’s basically a smaller version of what the police use.”

FQ Magazine, Autumn Edition



“the Pro is ahead of the game, condensing cutting edge technology and design into one super simple personal breathalyser… the best personal breathalyser available to buy right now.”

Read the full article here

Parkers Breathalyzer Review - AlcoSense Pro

"Just how accurate are home breathalyzers? We test one against a Police-spec unit.

We tested it [AlcoSense Pro] scientifically (not in the pub, honest) with some control alcohol measured to read just below the UK’s 35ml drink-drive limit. Tested on the sort of super-accurate unit the Police will use at the station for your conviction, we found our test unit [the AlcoSense Pro] read almost exactly the same as the Police device.

Verdict: If you drink, buy one. It’s a no-brainer, really."

Read the full review here.



Car Mechanics Review of AlcoSense Pro

“In the side-by-side comparison, the AlcoSense Pro proved to be as accurate as the larger machine [£13,000 Police breathalyser], as well as offering a number of innovations over other compact breathalysers.”




Lorraine ITV Breathalyzer Review

The Lorraine Show, ITV 1


“It’s very easy to be still over the drink drive limit in the morning; and the ‘Morning After campaign’ the Police have been running are picking up a lot more convictions now than they did 10 years ago. It’s worth getting yourself a DIY breathalyser. The AlcoSense Pro works very well and you can use it as many times as you like”.

Dr Hilary Jones

"A really, really handy thing"
Lorraine Kelly



Image result for practical caravan


"This device uses sensors developed from UK police units, so you can be sure you're safe to get behind the wheel if you've enjoyed a few drinks the night before."




"A 5-6% margin of error is added so that it never under-reads, and it switches between different countries with a few clicks of a button."

" ...this is a cost-effective way of keeping you, your licence and other road users safe." 





“delivers a level of accuracy that is on a par with police-approved devices”

 Read the full review here 



Rating: ★★★★★

“Easy to use and super accurate”

January 2018 Issue



 "The Pro is sleek and modern looking, with a simplistic design." "Once set-up the device itself is actually quite quick to use."

"blow to hard, too soft or not long enough, the Pro tells you clearly where you have gone wrong...it couldn't be made much simpler."

"the Pro performed excellently"...."clear and easy to understand"

"For any person who drives frequently, and especially for those whose livelihood depends on it, the AlcoSense Pro is a perfect solution to allow them to be confident in knowing the alcohol level in their system..."

Read the full review here


Mighty Gadget AlcoSense Pro Breathalyser Review

20th July 2017

"one of the most accurate devices on the market.... if your livelihood is dependent on your driving licence then this could be a very wise investment."

Read the full review here


“At its price, the AlcoSense Pro is arguably the most advanced breathalyser on the market”

November 2017 Issue

29th November 2017

“The AlcoSense Pro is top of the market. Right now, I wouldn’t be without it.”

Read the full review here


Road Magazine and Blog Logo

"One of the smartest, simplest & most effective car-related gadgets we've had the pleasure of testing. Compact, cool and clear."

Read the full review here

“Using the device is about as simple as it gets. Just slide the cover open, put the blow tube in place, follow the on-screen instructions of how long and how strongly to blow, and inspect the results. The breathalyser then tells you if you are under, close to or over the limit.”

Issue - October 2017

Customer Reviews

Upgrade to AlcoSense Pro from £109.99

Availability: Despatched within 2 working days of receiving your old unit back in part exchange


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