Breathalyzers can also "strike", i.e. show values on the display when the test person has not drunk any alcohol.

 

This can be the case, for example, with:

- Diabetics with acetone (acetone is a metabolic product that occurs, for example
   produced, for example, by insulin deficiency)
- if the microbiology of the intestine is disturbed (homebrew syndrome)
- with disinfectants or solvents in the ambient air
- if the test candidate has previously taken medication
- repeated use of the breathalyzer mouthpiece.
  Please always use a new mouthpiece for each measurement