Articles Posted in Breath-Blood-Urine-Testing

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Maine criminal defense lawyer John Webb explains why he doesn't believe the Intoxilizer 800 breath test machine accurately measures a person's blood alcohol concentration, or BAC.
For years DUI lawyers near me and breath testing experts claimed that breath test machines (like the Intoxilyzer 5000) read other substances on your breath as alcohol and thus gave a false high reading. These substances are called “interferents.” Examples of interferents are paint fumes, carburetor cleaner, and substances found in many beauty salon supplies. For just as many years the the corporation that made the machines (CMI, Inc.) and the Maine’s breath test staff claimed that was just a Portland ME defense lawyer’s gimmick.

They said the machines were specific for alcohol, would reliably detect interferents, and would subtract any interferents from the final blood alcohol content (BAC) results reading.

So who was right? Was it a gimmick from a DUI lawyer? Were the people whose jobs depended on the machines being right covering something up?

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breathtest-300x199-1Wikipedia defines Radio Frequency Interference as:

“Electromagnetic interference (or EMI, also called radio-frequency interference or RFI when in high frequency or radio frequency) is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.[1] The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit. These effects can range from a simple degradation of data to a total loss of data.”

This article discusses RFI and breath testing machines.

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