How does alcohol breaTh testers work?

Alcohol breath testers, or breathalyzers, work by measuring the concentration of alcohol in a person's breath. When a person consumes alcohol, it enters the bloodstream and is eventually exhaled through the lungs. The device typically uses a fuel cell or infrared spectroscopy to detect the presence of ethanol, converting the breath sample into a measurable blood alcohol concentration (BAC) reading. This reading can then be used to assess a person's level of intoxication.