What factors can negatively influence the accuracy of the Intoxilyzer 9000 results?

The accuracy of the Intoxilyzer 9000 can indeed be negatively influenced by factors such as temperature, humidity, and mouth alcohol. Temperature and humidity affect the physical and chemical processes involved in the alcohol detection process. The Intoxilyzer's sensors and the infrared light used for measuring alcohol content can produce different results based on environmental conditions.

Mouth alcohol, which can be present if a subject has recently consumed alcohol or used mouthwash containing alcohol, may be detected by the device, leading to inaccurate readings of a person's blood alcohol concentration (BAC). This factor is particularly significant because it can yield a false positive reading if the breath sample reflects residual alcohol in the mouth rather than alcohol being expelled from the lungs.

By understanding these influences, it becomes clear why ensuring proper testing conditions and procedures is critical for obtaining accurate results with the Intoxilyzer 9000.