June 2, 2026 | DUI/OVI
Many drivers assume that a breath test result over the legal limit automatically leads to an OVI conviction. However, a breath test is only one piece of evidence, and prosecutors must still prove that the test was administered in accordance with Ohio law.
What Is the Intoximeter DMT?
The Intoximeter DMT is the primary breath-testing device used by law enforcement agencies throughout Ohio. It uses infrared technology to measure alcohol in a person’s breath and estimate their blood alcohol concentration (BAC).
While the Intoximeter DMT is approved for use in Ohio OVI cases, the results are not automatically beyond challenge. Like any testing device, it must be properly maintained, operated, and administered according to state regulations.
What Does Ohio Law Require?
Before a breath test result can be admitted in an Ohio OVI case, the prosecution must generally demonstrate substantial compliance with state laws and Ohio Department of Health regulations.
Key requirements include:
- The test was administered by a properly certified operator.
- The Intoximeter DMT was properly maintained and certified.
- The driver was observed for the required 20-minute observation period.
- The breath sample was collected within the applicable legal time limits.
- The testing procedures complied with the Ohio Department of Health rules.
If the State cannot establish compliance with these requirements, a court may limit or exclude the breath test evidence.
Common Challenges to Intoximeter DMT Results
Although the Intoximeter DMT is widely used in Ohio OVI cases, breath test results can still be challenged under certain circumstances.
Common issues include:
- Problems with the 20-minute observation period
- Operator certification errors
- Instrument maintenance or calibration issues
- Medical conditions that may affect breath samples
- Timing issues related to the test
- Mouth alcohol contamination
A breath test result is only as reliable as the procedures used to obtain it. Reviewing these factors can help determine whether a challenge to the result is appropriate.
Frequently Asked Questions
If you have been charged with OVI after taking an Intoximeter DMT breath test, you likely have questions about your rights and the reliability of the test results. Below are answers to some common questions drivers have about breath testing and OVI cases in Ohio.
Can a Breath Test Be Wrong Even if I Blew Over 0.08?
Yes. A breath test result over 0.08 does not automatically mean the result is accurate or admissible. Issues with the testing procedure, observation period, operator qualifications, or the machine itself can affect the reliability of a breath test.
How Accurate Is the Intoximeter DMT?
The Intoximeter DMT is designed to provide accurate results when it is properly maintained and operated. However, factors such as calibration issues, testing conditions, medical conditions, and procedural errors can affect the accuracy of an individual test.
Can I Refuse a Breath Test in Ohio?
Yes, but refusing a breath test can result in consequences under Ohio’s implied consent laws. A refusal may trigger an Administrative License Suspension and could be used as evidence in your OVI case.
Can Acid Reflux, GERD, or Diabetes Affect a Breath Test?
Potentially. Conditions such as acid reflux and GERD may contribute to mouth alcohol contamination, while diabetes and certain metabolic conditions can affect breath chemistry. These factors may be relevant when evaluating the reliability of a breath test result.
Does the Officer Have To Read Me Anything Before the Breath Test?
Yes. Ohio law generally requires officers to provide an implied consent advisement explaining the consequences of taking or refusing a chemical test. Failure to follow these requirements could affect certain aspects of the case.
What if My Two Breath Samples Don’t Match?
The Intoximeter DMT requires two breath samples that fall within an acceptable range of one another. If the samples do not sufficiently agree, the test may be deemed invalid, and the machine may generate an error message.
How Long Do I Have To Act After an OVI Charge in Ohio?
You should act as quickly as possible. Important deadlines can arise shortly after an OVI arrest, including deadlines related to license suspension issues and pretrial motions. Speaking with an attorney early can help preserve potential defenses and ensure critical evidence is obtained.
Contact Suhre & Associates DUI and Criminal Defense Lawyers To Schedule a Free Consultation With a Cincinnati Criminal Defense Attorney
A breath test result over the legal limit does not automatically mean a conviction is inevitable. The reliability of an Intoximeter DMT result depends on proper testing procedures, accurate equipment, and compliance with Ohio law. Reviewing the circumstances surrounding a breath test can help identify issues that may affect the strength of the prosecution’s case.
If you have been charged with OVI after taking an Intoximeter DMT breath test, it is important to understand your rights and legal options. For more information, contact an experienced criminal defense lawyer in Cincinnati, OH, at Suhre & Associates DUI and Criminal Defense Lawyers to schedule a free consultation today. Give us a call today at (513) 333-0014 or visit us at our Cincinnati Law Office.
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