Which of the following is NOT one of the six parts of the Intoxilyzer 9000?

The pressure gauge is not one of the six parts of the Intoxilyzer 9000. This device is specifically designed to measure blood alcohol content through the analysis of breath samples, and its key components include the sample chamber, lens, and wavelength filters.

The sample chamber is where the breath sample is analyzed, while the lens focuses the infrared light onto the sample, allowing the Intoxilyzer to detect the presence of alcohol. Wavelength filters are critical as they ensure that the device only measures specific wavelengths of light associated with alcohol.

In contrast, a pressure gauge, while potentially useful in various contexts, is not a necessary component for the operation of the Intoxilyzer 9000, which utilizes optical and chemical processes to determine BAC levels without the need for pressure measurement.