What is the function of the mouthpiece on the Intoxilyzer 9000?

The mouthpiece on the Intoxilyzer 9000 serves a critical role in preventing cross-contamination between breath samples. This is essential for ensuring the accuracy and reliability of the test results. By using a disposable mouthpiece, each sample collected is isolated from previous samples, which helps to avoid any residual mouth alcohol or saliva that could lead to inaccurate blood alcohol concentration (BAC) readings. This design feature is vital for maintaining the integrity of the sampling process, as any contamination could skew the results and potentially affect legal outcomes.

While enhancing breath collection, assisting in providing accurate readings, and warming the breath sample are important factors in the overall functioning of breath analysis devices, the primary and most crucial function of the mouthpiece specifically addresses the need for sample purity by preventing cross-contamination.