Breathalyzer and Breath Tests in Columbus, Ohio

ATTENTION

Perhaps the most common way police try to find evidence that someone was driving under the influence is through Breathalyzer and breath tests. When someone blows over the Ohio legal limit of .08, they can be charged with OVI / DUI per se. That means it does not matter if your driving was perfect: the percentage of alcohol in your blood is enough to establish a violation.

However, breath tests are far from perfect and there are numerous factors that can cause a breath test machine to give an inaccurate reading. If you’ve been charged with OVI / DUI based on the results of a breath test, an experienced OVI attorney may be able to help you fight the charge.

How Breath Tests Work in Ohio

The types of breath tests that are admissible in court in Ohio predominantly use infrared technology to calculate your blood alcohol content. You’re asked to blow into the machine for as hard and as long as you can to capture the breath from deep inside your lungs where there are the most blood vessels. Alcohol passes through the walls of your blood vessels into your lungs, and the idea behind the breathalyzer is that the breath from the depth of your lungs comes closest to reflecting the alcohol content of your blood. The breathalyzer machine uses infrared wavelengths to detect alcohol molecules and is programmed to calculate your BAC.

The Ohio Department of Health is responsible for approving the breath test machines that can be used for evidentiary purposes in the state. Currently, the breathalyzer machines approved for use in Ohio that produce results that are admissible in court are the BAC DataMaster, BAC DataMaster K, BAC DataMaster cdm; Intoxilyzer 5000 series 66, 68, and 68 EN; and the Intoxilyzer 8000.

Law enforcement officers in the field also may use handheld breath test devices but the results of those are not admissible as evidence of an OVI / DUI offense.

PBT vs. Evidential Breath Tests in Ohio

Ohio law divides breath alcohol testing into two very different categories, and understanding which test you took matters for your defense.

Portable Breath Tests (PBTs). Officers carry handheld breathalyzers in the field and often ask drivers to blow during a traffic stop. These roadside devices are screening tools only. Under ORC 4511.19 and Ohio case law, PBT results are not admissible at trial to prove BAC, though officers can use them to establish probable cause for an arrest. You can decline a PBT without triggering Ohio’s implied consent penalties, because the implied consent statute applies to evidential tests administered after arrest.

Evidential Breath Tests. Once you are arrested and taken to the station or a mobile testing unit, the sample the officer takes from you is considered evidential. The Ohio Department of Health approves a short list of machines for evidential testing, with the Intoxilyzer 8000 being the most common in central Ohio outside Franklin County. Refusing an evidential test triggers an automatic license suspension under Ohio’s implied consent law.

If you are not sure whether the test you took was a roadside PBT or a station-house evidential test, ask your attorney to review the arresting officer’s report and the chain-of-custody documents. That distinction drives which challenges your defense can raise.

Ohio Regulations for Breath Tests

To be valid, a breath test administered in Ohio has to comply with certain laws and regulations that govern when a test can be administered to a suspected intoxicated driver, how the samples are analyzed, how the results are recorded, and how the machine is maintained and calibrated. When these rules aren’t followed, a good OVI / DUI defense lawyer may be able to convince a judge to rule that the results can’t be used in court.

Some key regulations involving breathalyzer machines are:

• Breath tests have to be administered within three hours of when you are alleged to have driven under the influence
• You must be observed for a mandatory 20 minutes before the breath test
• The samples must be analyzed according to the machine’s operational checklist
• A proper instrument check must be performed every seven days to ensure the machine is in proper working order
• The instrument check has to follow procedures and meet specific parameters described in the Ohio Administrative Code
• The person performing the test has to be a valid senior operator or operator as described in the Ohio Administrative Code

How to Challenge a Breath Test Result in Ohio

Breath test results look authoritative in court, but they are only as reliable as the machine, the officer, and the procedure behind them. At Luftman, Heck & Associates, we routinely pull apart every step between the moment of arrest and the printout that the prosecutor intends to hand the judge. When any piece of that chain breaks down, your attorney can move to suppress the result, challenge its weight, or argue for reduced charges. Here are the most productive angles we use to challenge breath test evidence in Franklin County and central Ohio courtrooms.

Calibration and Maintenance Failures

Evidential breath machines have to be calibrated on a strict schedule. Ohio Administrative Code 3701-53-04 requires an instrument check every seven days, with the results logged and preserved. If the agency cannot produce those records, or if the check fell outside required parameters, the reading it produced may be unreliable. We subpoena maintenance logs, calibration solution certifications, and Department of Health inspection reports, and we look for gaps, missed checks, out-of-tolerance readings, and expired reference solutions. A single missing record is often enough to keep a breath result out of evidence.

Operator Certification and Training Errors

Only senior operators and operators certified under Ohio Administrative Code 3701-53-07 are permitted to administer evidential breath tests. Certifications expire, lapse, or were never issued for the specific machine used. When the officer who ran your test does not hold a current credential for that specific instrument, the state cannot lay the foundation for admitting the result. We pull operator access cards, training records, and permit histories for every officer involved in the test.

The Mandatory 20-Minute Observation Period

Ohio rules require that the suspect be observed continuously for a full 20 minutes before the breath sample is collected. During that window the officer must watch for any belching, vomiting, regurgitation, or oral ingestion that could affect the reading. In reality, officers often step away, process paperwork, or leave the suspect unattended. When the observation period was interrupted, even for a minute, the sample risks mouth alcohol contamination and should not go to the jury.

Medical Conditions That Skew Readings

A surprising number of medical conditions can inflate a breath alcohol reading without any impairment. Gastroesophageal reflux disease, or GERD, can push alcohol-containing stomach contents into the mouth and throat just before the breath sample. Uncontrolled diabetes can cause the body to produce acetone, which infrared breath machines can misread as ethanol. A low-carbohydrate or ketogenic diet produces isopropyl alcohol and acetone that the instrument cannot always filter out. Recent asthma inhaler use, oral wounds, and certain mouthwashes, cold medicines, and denture adhesives can introduce residual alcohol. If you have a documented medical condition, we gather the clinical records and expert testimony needed to explain the inflated number.

Mouth Alcohol Contamination

A breath alcohol machine is calibrated to read deep lung air. When a small amount of alcohol remains trapped in the mouth, throat, or esophagus, the first breath that reaches the sensor is not lung air at all. The result is artificially high. Burping, regurgitating, recent drinking during a traffic stop, dental work, oral piercings, retainers, and the 20-minute observation failures described above all create mouth alcohol conditions. The Intoxilyzer 8000 has slope-detection software that is supposed to flag mouth alcohol, but it misses often enough that independent breath test experts regard mouth alcohol as one of the most common sources of false positives.

Intoxilyzer 8000 Reliability Issues

The Intoxilyzer 8000 has been the target of serious challenges in Ohio and other states. The Ohio Supreme Court has recognized the right to challenge specific Intoxilyzer 8000 results based on the machine’s reliability. Franklin County does not use the Intoxilyzer 8000, but neighboring central Ohio counties do. Known issues include an inability to fully distinguish between mouth and lung air, a fixed 2100:1 blood-to-breath partition ratio that does not reflect individual physiology, and a history of software and hardware problems. When the machine used in your case was an Intoxilyzer 8000, we examine the source data, error codes, and testing history from that specific unit.

Radio Frequency Interference and Record-Keeping

Breath machines can be disrupted by nearby police radios, cell phones, and other RF sources. Ohio rules require a radio frequency interference check using the types of radios the agency uses. Skipping that check or using the wrong equipment during it can invalidate the result. Separately, agencies are required to keep specific forms and logs for a set period. Missing test cards, incomplete logs, or destroyed records all give defense counsel grounds to argue the sample cannot be verified.

Even if your reading was over the legal limit of .08, a suppression motion or targeted challenge to the procedure can get the number excluded or its weight reduced. Our Columbus OVI defense team has used each of the angles above to get charges reduced or dismissed for clients across Franklin County, Delaware County, and the surrounding central Ohio courts. If you chose to refuse the breath test entirely, Ohio’s implied consent law imposes an automatic license suspension of at least one year, even when the underlying OVI charge never results in a conviction.

Frequently Asked Questions About Ohio Breath Tests

How accurate are breathalyzers?

Evidential breath machines approved by the Ohio Department of Health, including the Intoxilyzer 8000 and BAC DataMaster series, are designed to produce readings within a narrow margin of error. In practice, accuracy depends on calibration schedules, operator training, the 20-minute observation period, and the physiology of the person being tested. Independent analyses routinely find real-world error rates higher than the advertised accuracy, which is why defense attorneys review every step that led to the printout.

Can I challenge a breath test in Ohio?

Yes. A breath test result is only evidence, not a conviction, and Ohio law gives defendants multiple paths to contest it. You can challenge calibration records, operator certification, observation-period compliance, the machine’s maintenance history, chain of custody, and specific instruments such as the Intoxilyzer 8000. When any of those grounds succeeds, your attorney can file a motion to suppress the result or argue for reduced charges.

What is the margin of error for a breath test?

Ohio regulations allow a breath test result to fall within a narrow statutory tolerance during calibration checks, but the real-world margin for an actual test is wider. Variables like body temperature, breathing pattern, hematocrit level, and the fixed 2100:1 partition ratio assumed by the machine can all shift the reading. A reported BAC of .08 may not reflect the driver’s true blood alcohol level, which is one reason defense attorneys rarely accept a breath result at face value.

What is the Intoxilyzer 8000?

The Intoxilyzer 8000 is an infrared breath alcohol instrument manufactured by CMI, Inc., and approved by the Ohio Department of Health for evidential testing. Several central Ohio counties use it, though Franklin County does not. The machine has been the subject of Ohio Supreme Court litigation and ongoing defense challenges tied to its software, its inability to fully distinguish mouth from lung air, and its fixed partition ratio.

At Luftman, Heck & Associates, we help clients confront the Ohio criminal justice system from arrest through trial. By advocating for your rights and thinking strategically about your defense, we work to maximize your chances of a positive outcome. If you have been charged with OVI in Columbus, call us today for a free, confidential consultation.

Charged with DUI in Columbus? Contact Us.

If you’ve been charged with a OVI / DUI, it’s important to know what you’re up against. If you have any questions left unanswered by this page, or if you need a competent, experienced Columbus DUI attorney to fight for you in court, please contact us at (614) 500-3836 or via email at advice@columbuscriminalattorney.com.