If you were just arrested for DUI and the Intoxilyzer 8000 reported a breath alcohol level over .08, it’s easy to feel trapped by the number. Many people assume the machine must be right.

But the Intoxilyzer does not measure alcohol in your blood. It estimates alcohol concentration from your breath using assumptions about clean air, proper purging, instrument airflow, and your physiology. When those assumptions fail, the reported number can be artificially high, even for someone who did not drink enough to be over the legal limit.

If the reading doesn’t make sense, don’t panic and don’t assume you’re out of options. There are practical steps you can take immediately to preserve evidence and fight the allegation.

Attorney for DUI Breath Test Cases in Tampa, FL

The DUI defense attorneys at Sammis Law Firm focus on challenging breath tests involving the Intoxilyzer 8000. We know how to obtain and audit the electronic data tied to the instrument used in your case, including error events, clearing problems, and indicators of instrument condition that are not obvious from the one-page result slip.

In many cases, the breath test becomes the State’s most persuasive evidence. That is exactly why you should have an attorney who knows how the machine works, what can go wrong, and how to present those issues effectively in court and at the Bureau of Administrative Reviews.

Call 813-250-0500 to discuss your case and the best strategy to challenge the breath test result.

Why a Breath Test Can Read High Even When You Didn’t Drink That Much

A breath test reading over .08 can be inaccurate for more than one reason. Some issues are environmental. Others are mechanical. Others involve the assumptions the machine makes about the person providing the sample.

1) Alcohol Vapors in the Room or Near the Machine

The Intoxilyzer needs “clean” room air to establish a baseline. If the air contains alcohol vapor, the baseline can be contaminated and the machine can start from the wrong reference point.

• Hand sanitizer used by officers, staff, or subjects
• Cleaning chemicals or disinfectant sprays in the testing area
• Poor ventilation or a small testing room
• Residual vapor from recent tests in the same room

2) The Instrument Did Not Fully Clear (Purge) Between Steps

The machine is supposed to clear alcohol vapor out of its breath path between samples and checks. If it does not clear properly, leftover vapor can affect later steps and inflate the reported number.

• Carryover vapor from a prior test sequence
• Clearing problems after an aborted or interrupted test
• Conditions that cause “ambient” or air-blank anomalies

3) Airflow or Breath-Path Problems Inside the Instrument

The Intoxilyzer depends on precise airflow through internal components and tubing. Mechanical or airflow problems can interfere with purging and baseline stability, leading to unreliable results.

• Leaks, worn tubing, or compromised breath-path components
• Conditions that prevent the chamber from clearing normally
• Instrument condition problems that are not visible to the operator

4) Mouth Alcohol and “Not Deep Lung Air” Issues

The machine assumes it is analyzing deep lung air. If alcohol is present in the mouth or upper airway, the sample can be elevated even when the true blood alcohol level is lower.

• Recent burping, belching, or regurgitation
• Acid reflux or GERD
• Dental work, dentures, or alcohol trapped in the mouth
• Recent use of mouthwash or breath spray

5) The Machine Uses Averages That Don’t Fit Everyone

The Intoxilyzer converts breath alcohol into a number using fixed assumptions that do not perfectly match every person. For results near the legal limit, small physiological differences can matter.

• Breathing pattern and timing
• Body temperature (fever or elevated temperature)
• Lung function differences due to age or medical conditions

What You Should Do Immediately After a DUI Arrest (If You Believe the Reading Is Wrong)

1) Do Not “Talk Yourself Into” Pleading Guilty

Many innocent people plead guilty because the breath number feels unbeatable. That’s a mistake. The number is not the whole story, and the supporting records often contain the best defense evidence.

2) Act Quickly to Protect Your Driver’s License

In Florida, the administrative suspension timeline moves fast. Waiting can cost you options. You may need to request a formal review hearing quickly after the arrest to challenge the suspension and preserve issues.

3) Get the Right Records Before They Get Lost in the Shuffle

A one-page result slip is not enough. The important data is usually in the electronic records tied to the instrument and the testing sequence. Your attorney should request and review:

• Subject test electronic data for the test in your case
• Prior tests on the same instrument around the time of your test
• Inspection and maintenance records for the same instrument
• Any error/exception events showing clearing or airflow problems

4) Write Down Details While They Are Fresh

Small details become important later. As soon as you can, write down:

• What you drank and when you drank it
• Whether you used mouthwash, breath spray, or medication
• Whether you burped, felt reflux, or had nausea
• Whether hand sanitizer or cleaning chemicals were used nearby
• How long you waited before the test and what happened in the room

Hearings That Matter in a Florida DUI Breath Test Case

Formal Review Hearing (Bureau of Administrative Reviews)

The formal review hearing can be an early opportunity to challenge the administrative suspension, obtain documents, and lock in testimony. In some cases, the issues you raise at the administrative level help frame the problems with the breath test later in court.

Pretrial Motions in the Criminal Case

Depending on the facts, your attorney may file motions targeting the admissibility of the breath test results. The most persuasive challenges are usually supported by a detailed audit of the electronic data and compliance records for the specific Intoxilyzer used in your case.

Talk to a DUI Breath Test Attorney Now

If the Intoxilyzer 8000 result does not match reality, you need to act quickly and preserve the right evidence. The sooner an attorney requests the electronic data and related records, the better your chances of finding the problem that explains an artificially high number.

Call Sammis Law Firm at 813-250-0500 to discuss your DUI arrest, the breath test result, and the best strategy to fight the allegation.