Breath testing machines in California are manufactured to be accurate within 0.01% of the actual blood alcohol level, and California law requires that two breath test samples taken must be within 0.02% of each other; however, breath test results can be challenged based on calibration records and other factors, meaning they are not automatically conclusive evidence of guilt.
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How Reliable Are Breath Tests in California DUI Cases?Added:
So we get asked how reliable are the breath tests in California? The manufacturers of the breath testing machines, they promise or guarantee that their result is within.01% of the actual level. Under California law, the variance or the two tests that are taken have to be within.02% of each other. Breath tests are challengeable depending on the calibration records law enforcement have and lots of other reasons. David Leer Law, strongestdefense.com.
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