Will smoking affect the result of a breath test using a Lion instrument?
There are many different chemicals in tobacco smoke, and some of these could either damage the instrument, and/or influence the breath alcohol reading to a very small extent. The general rule is to allow a period of at least TWO MINUTES since the subject last smoked before taking a sample of breath from them. This delay period is generally more than adequate as, in most cases, any significant traces of smoke are gone from their lungs in under HALFa minute. On no account ever allow raw tobacco smoke to enter the instrument. This could possibly damage the sensitive alcohol sensing system within it.