For example, a BAC of 0.08 means 0.08 grams of alcohol per 100 milliliters of blood.īut how can breathalyzers determine your blood alcohol concentration through your breath? When you drink an alcoholic beverage, the alcohol does not get broken down immediately, and it enters your bloodstream without any real changes to its chemical structure. Breathalyzers and BACīreathalyzers work by measuring your blood alcohol concentration, which is expressed as a percentage that equates to the weight of ethanol in grams for every 100 milliliters of blood. Read on to learn more on how ignition interlock devices work. Many people wonder how long car breathalyzers can detect alcohol on your breath. They can be an impactful tool in discouraging and preventing alcohol-impaired driving and any injuries, deaths, or property damage resulting from it.
Used by law enforcement and in ignition interlock devices, breathalyzers have become the primary tool for detecting the presence of alcohol and measuring a person’s blood alcohol concentration when taking a blood or urine sample may be too difficult at that moment in time.
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