The first device meant to provide a visual indication of intoxication levels was introduced in 1954 and was called the “Drunkometer.” Since then, breathalyzer technology has made significant advancements, making the devices quicker, more user-friendly, and generally more accurate. Even so, these devices still have a margin of error that, in some cases, can result in a person who is not impaired being convicted of DUI.
An individual’s lung capacity, body temperature, and rate of alcohol metabolism can impact the concentration of alcohol in the breath. Add to that the timing of the test, as testing too early can result in inaccurately high readings due to residual mouth alcohol. Other variables include medical conditions and substances other than alcohol in the breath that may be falsely detected as alcohol by breathalyzer machines.