A breathalyzer is a device used to measure the amount of alcohol in exhaled air to estimate blood alcohol concentration (BAC). It works using an electrochemical or infrared sensor that detects ethanol vapors. The device is commonly used for personal checks before driving, by police for roadside testing, and in workplaces to ensure safety. Results are displayed in promille (‰) within seconds. It is a quick and convenient way to prevent accidents and ensure compliance with legal alcohol limits.
















