This is a common question and one that can cause a lot of confusion as different models of breathalyzer can display different units of measure. Valuebreathalysers www.valuebreathalysers.co.uk commonly receive questions regarding this, and today was no exception.
Alcohol Breathalyzer Limits UK
Here are the current UK alcohol breathalyzer limits for drivers on a normal driving license, that you may often see quoted-they all refer to the same amount of alcohol in the blood stream it is just the unit of measure that is different. The different ways that this is displayed can cause confusion.
The most common measurement is the BAC or blood alcohol concentration. Some models of breathalyzer display in BRAC or breath alcohol concentration but this is far less common now.
Blood Alcohol Concentrations (BAC) – 80 milligrammes of alcohol in 100 millilitres, 80mg/ml, 080 on mg/100ml display or 0.08 %BAC, 0.8 Promille
Breath Alcohol Concentrations (BrAC) – 35 microgrammes of alcohol per 100 millilitres of breath
If you are purchasing a breathalyzer it is important to know the unit of measure that that the breathalyzer diplays in so that you interpret the readings correctly.
To find out more about UK breathalyzer limits and limits for other EU countries including France visit
The UK’s limits are much higher than most other EU countries and there are many who believe that they should be brought down to a lower level for example 0.05%, which is the limit in most EU countries. for a driver on a normal driving license. Some countries operate even lower limts of 0.02 % BAC or even 0. I think it will only be a matter of time before the UK follows suit, and come into line with most of Europe with a 0.05% limit. Most drivers are impaired by even small amounts of alcohol in their blood stream and the effect does vary considerably from driver to driver. Generally the higher the levels of alcohol , the greater the impairment.