These factors can influence breath test device accuracy

On Behalf of | Dec 18, 2023 | Criminal Defense |

Breath test devices determine blood alcohol content levels, providing law enforcement with a valuable tool for maintaining road safety. However, their accuracy hinges on several key factors.

Awareness of these elements is important for anyone seeking a deeper understanding of the reliability of breath test results.

Calibration and maintenance

A key factor influencing breath test accuracy is the calibration and maintenance of the device. Regular calibration ensures that the instrument remains sensitive to trace amounts of alcohol. Failure to calibrate or maintain the device can lead to inaccurate readings. This can impact legal outcomes and compromise the reliability of BAC measurements.

Environmental conditions

Environmental factors such as temperature and humidity can impact the accuracy of breath test results. Temperature changes affect the chemical reactions occurring within the device. When this happens, it can lead to deviations in BAC readings. High humidity levels may also introduce moisture into the system. This can affect the precision of the measurements.

Individual variations

Human physiology varies widely. This diversity can influence the accuracy of breath test devices. Factors like lung capacity and breathing patterns may contribute to BAC reading variations.

Mouth alcohol

The presence of residual mouth alcohol is another factor that can compromise the accuracy of breath test devices. Inhaling fumes from substances like mouthwash, breath fresheners or even certain medical conditions can introduce additional alcohol into the breath sample. This can lead to elevated readings.

Medical News Today reports that most breath test devices produce similar readings, with about 94% of them placing impaired drivers into similar categories. However, this suggests that breath test results are less accurate in about 6% of instances. Staying informed about the factors that impact accuracy helps ensure an accurate assessment of an individual’s BAC level.