breathalyser


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to breathalyser: breathalyzer, Preliminary Breath Test

breathalyser

A device used to detect alcohol on a suspected drunk driver’s breath.

Principle
The air in the alveoli is in intimate contact with the capillary blood, meaning that the blood alcohol concentration can be closely estimated from concentration of alcohol in the breath. The breath to blood ratio is about 1:2300, with the caveat that breath alcohol concentration rises faster and falls earlier than in venous blood.
References in periodicals archive ?
On the other hand we have had people who didn't look drunk yet they failed the breathalyser so I'm giving it a chance though I'm not fully convinced it's going to work in the long run.
The breathalysers have three levels rated green, amber and red.
There's no guarantee that the breathalyser you use – no matter how much you pay for it – will be accurate against the device used by the police.
Main, Mrs Raj Jones, the wife of breathalyser inventor Dr Thomas Parry Jones (left), unveils a commemorative plaque of her husband at the official opening of the new police HQ in Llangefni Pic: RICHARD BIRCH
Six out of 10 Britons travelling to France are not aware they have to carry two NF approved breathalysers at all times, according to the company.
Only 13% said that the new regulations will reduce people driving over the limit, and 70% said that drivers will only carry the breathalysers to comply with the law, and will not change their behaviour.
New French regulations require drivers to include two breathalysers in vehicles when driving in the country
But if you are stopped you'll probably also be asked to blow into a police breathalyser anyway.
Motorists who appear unfit to drive will be stopped and asked to take a breathalyser test if police suspect they are driving under the influence of alcohol, although Dubai Police will not carry out random breathalyser tests, which is standard practice in many countries.
MILLIONS of motorists could risk losing their licences this summer if they are encouraged to drink-drive by the number of cheap breathalyser kits flooding the market.
More than half the devices tested - costing between EUR5 and EUR18 - gave a "safe to drive" reading when an official breathalyser used at the same time showed the person was not.
Any youngsters who are suspected of drinking at the venues will be asked to carry out the breathalyser test.