A breathalyzer operates by analyzing the subject's breath for ethanol, or alcohol, using either a fuel cell or infrared spectroscopy.

This converts the chemical reaction or light absorption into a digital reading of the subject's Blood alcohol content whicj is called BAC.

When the subject blows into the machine, the alcohol in the subject's breath interacts with the sensor

This sequence creats an electrical signal or altering light waves, a microprocessor then translates this into a numerical BAC percentage, indicating the level of intoxication. Call Jack Hyatt if you have any questions