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Understanding the Different Types of Breathalyzer Tests in DUI Cases

Aurora DUI breathalyzer test defense lawyerEvery so often, when people are hanging out and drinking a few beers, the topic of drunk driving will come up. Such conversations may be filled with misinformation about Illinois laws on driving under the influence. One of the most common debates involves breathalyzer tests--whether or not you can refuse to take them, and what happens if you refuse. This article seeks to clear up some of these questions surrounding breathalyzer tests.

The Roadside Breathalyzer vs. the Police Station Test

Many people are surprised to learn that there are two different types of breathalyzer tests:

  • The preliminary breath test, which is conducted with a portable breath-analysis device at during a traffic stop at roadside.
  • The evidentiary breath test, which is conducted with a stationary machine at a police station.

Note that a person’s blood-alcohol concentration can also be measured by a blood test, but this article will focus strictly on breath testing, since it is the most common method.

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