The Breath Alcohol Detector is for rapid detection of the presence of alcohol in exhaled breath and provides relative Blood Alcohol Concentration (BAC) at 0.05%. The test is based on a chromogenic
reaction.Alcohol, if present in the exhaled breath, reacts with the chemically coated crystals and produces a colour change. This colour change is proportional to the concentration of alcohol in
the breath, which is an approximation of relative Blood Alcohol Concentration (BAC).