When Stopped By The Police, How Do They Measure Alcohol Levels?

When Police pull a driver over, they are usually concerned with the driver’s Blood Alcohol Content or Concentration.

They usually measure BAC in concentration of alcohol in the bloodstream and is measured as mass per volume.

For example, using the English drink drive limit, a BAC of 0.8% means the same as 80 milligrams of alcohol for every 100 millilitres of blood.

Or if we use the drink drive limit in Scotland, a BAC of 0.5% means the same as 50 milligrams of alcohol for every 100 millilitres of blood.

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