How do I operate a breathalyzer?
Most breathalyzers can be used by following the same general steps.

First, you turn the device on and wait for a "countdown". During the countdown, the alcohol sensor is being warmed up to be at the proper temperature for accurate testing.

When the countdown is done, you will hear a beep and/or see a "Ready" indicator.

The breathalyzer is now ready to take a breath sample. Blow sharply and steadily into the device, using a mouthpiece, if applicable. (If your breath sample does not register, please try again by resetting the device, then blowing even more sharply and for a longer time.)

Wait a few moments for the breathalyzer to analyze the breath sample.

When the analysis is done, you will see a %BAC reading displayed.

How do I install a "Pre-Calibrated Replaceable Alcohol Sensor Module"?
Please refer to our Pre-Calibrated Sensor Module page.

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