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infrared energy Tag

Dayton DUI Attorney Charles Rowland > Posts tagged "infrared energy"

Breath Testing: A Synopsis of the Intoxilyzer 8000

The Intoxilyzer 8000 breath test machine uses the method of INFRARED ABSORPTION to analyze a breath sample.  Unlike the BAC DataMaster, the Intoxilyzer 8000 uses a pulsed Infrared light source.  The wavelength frequency is 3.4 and 9.4 microns for ethanol and other interfering substances.  The decrease in intensity of the infrared light due to absorption by alcohol in the breath sample is proportional to the amount of alcohol in the breath.  The sample chamber holds 29.4 cc's of deep lung air for the Intoxilyzer 8000's analysis.  The information most recently shared by the Ohio Department of Health indicates that the...

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The BAC DataMaster: Margin of Error and Interfering Substances

HOW THE MACHINE WORKS[1]The BAC DataMaster is an evidential breath testing machine which works on the principles of infrared spectrophotometry.  Many vapors, including ethanol in the breath, absorb[2] infrared energy.  The machine captures a breath sample in its testing chamber and sends a beam of infrared energy through the sample.[3] When infrared energy passes through the ethanol molecule[4], the molecule begins to vibrate at its Hydro-Carbon bond and in the process uses up some, or all, of the energy.[5] Repeated scientific experimentation has allowed chemists to conclude that ethanol vibrates at – to varying degrees – are 3.4, 5 and...

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