What is Breathalyzer False Positive?
Before we discuss some possible reasons for a false positive test results, one must first consider the breathalyzer percentage of accuracy. With most Breathalyzers having accuracy range of ±10% which is ±.01% BAC (on the scale of zero to .10% BAC), some false positive readings may fall within the manufacturer's specification.
Having said that, beside alcohol, the sensor inside the breathalyzer deals with several other gases with overlapping detection spectrum such an acetone, ketones and etc. which are normally radiated from our lungs. These gases are much higher in people with higher level of fatty acids. folks with hi protein diet tends to show higher level of acetone in their breath while a higher level of ketones may indicate a possible diabetic condition. In case of a diabetics situation Breathalyzers can falsely read as high as .03% BAC.
Although most Breathalyzers are designed very selective to alcohol, but unfortunately in some users these side gases could be significant. We have also learned that subjects with false positive do not always blow positive but only in certain times of the day when their metabolism is most active.
To confirm a false suspicion always try your device with friends or family members to see if the majority of them produce false positive. In that case, contact the device manufacturer for possible calibration or repair.
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