Police routinely use a handheld breath-alcohol concentration (BAC) device to determine whether suspected drunk drivers may be impaired. If the device registers a BAC of 0.08 percent or higher, the officer has probable cause for a DUI arrest. Actual evidence for a possible DUI case against the suspect is taken later, when a breath sample is analyzed by a larger, more-accurate alcohol-detection instrument at the station (commonly referred to by the "Breathalyzer" brand name). Nothing is perfect, but these instruments are subjected to rigorous testing and are considered reasonably accurate when properly used and calibrated.
While there are instances when it makes sense to challenge the evidence in a DUI case, motorists often wonder how to trick a Breathalyzer into providing a lower BAC reading. But despite numerous claims to the contrary -- sucking on a penny, for instance -- it's practically impossible to alter the results of a breath-alcohol test. The following information will help you separate fact from fiction with respect to "tricking" a Breathalyzer.
How Breath Testing for Alcohol Works: The Basics
Before looking at the various myths of how to trick a Breathalyzer, it's important to learn how these instruments work. While drinking, some of the alcohol that is absorbed into the bloodstream evaporates into the lungs as it moves through the alveoli (the tiny air sacs where gasses are exchanged). Most alcohol-detection instruments use a method called infrared spectroscopic analysis, in which the frequency of light waves absorbed by a suspect's breath vapor reflects his or her approximate BAC. The machine then translates this breath data into an estimated percentage in the bloodstream, since the two measurements rise and fall in proportion to one another.
Because motorists cannot voluntarily control this exchange of gases between the bloodstream and the lungs, masking agents (such as mints, mouthwash, or even copper pennies) will not change the level of detectable alcohol on one's breath. The portable roadside devices, known as alcohol screening devices (ASD), are not quite as accurate as the larger, evidentiary breath test instruments used at the police station after an arrest is made. Officers are instructed to wait 15 to 20 minutes prior to conducting a breath test in order to rule out skewed results from the ingestion of food, chewing gum, asthma inhalers, or other substances. Directly testing a suspect's blood is still the most accurate way to measure BAC levels.
The Myths: So You Think You Can Trick a Breathalyzer?
A DUI defendant may successfully challenge the results of a breath test if the instrument wasn't properly calibrated; the suspect had excess acetone on the breath, which is perceived as alcohol (common among diabetics); or if other outlying causes are to blame. But actively influencing -- and lowering -- one's estimated BAC level during a breath test is virtually impossible.
Here are some popular myths:
Facing a DUI Charge? Get a Free Case Review
If you have been charged with a DUI, even after sucking on a roll of pennies or holding your breath, you may want to explore your legal options. A DUI conviction will result in license suspension, fines, and other sanctions. In order to get the best possible outcome at (or before) trial, get a free evaluation of your DUI case from an experienced attorney today.