To ensure optimal performance, all breathalyzers must be calibrated periodically. Calibration is a process in which a trained technician adjusts the software inside the breathalyzer so that it measures BAC levels accurately. Over time, as a breathalyzer is used, its sensor becomes saturated, and the results of the device can drift. You ca
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calibration done but not really
I sent My older device in for Calibration, as it was a few points off from the newer device I own. It was sent back to me and I again tested against the newer device and is still off. I'm not sure what calibration entails but I thought it would make it actually accurate at base or "zeroline" save your money on calibration and just buy a new one
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MarkAnthony · October 16, 2026
Quick service with frequent progress updates.
Just sent it in for calibration. It was returned promptly, but I would have liked to know the outcome, whether it needed it and how much it was off, to get an indication on how much I can rely on its accuracy over time and how often I should send it in.
Great and accurate device. I find it very useful sticking it a pocket when going out to have it handy just in case.
I never use the app feature so could live with that not being there.
I have had this device for 4 years where it has worked prefectly.
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Jens · October 9, 2026
Relatively Easy Calibration
I have several BACtrack Mobile breathalyzers. When I noticed one reading far lower than the others, I paid the reasonable fee and dropped it off at a UPS store.
Within two weeks, I had a freshly calibration device that differed from the others by only 0.002%.
BACtrack breathalyzers are handy devices I have found to have great utility over the years.