When a person consumed alcohol and exhale air into the breathalyzer then the gas sensor plays its role. The conductivity of the gas sensor compound will be changed on the basis of alcohol concentration. And this sensor generates output that is being processed by the control board. The control board will work as a brain that makes decisions and send the data to the display unit to show the alcohol level.
Modern breathalyzers are fairly accurate, but they are not perfect. Its accuracy mainly depends on the gas sensor whereas the control board comes second in this. The analyzers are having a margin of error, as any device can, and can be off as much as .01%.
Breathalyzers are the most preferred gadget to check the blood alcohol level, as they provide fairly accurate and quick results. Unlike other methods where blood or urine samples are collected, which takes much time and effort to inspect. I hope this article helps to understand Breathalyzers.
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