Breath 
                                                          analyzer machines, 
                                                          (Breathalyzer, Intoxilyzer, 
                                                          Alcosensor, Alcoscan 
                                                          and BAC Datamaster are 
                                                          common brand names), 
                                                          don't actually test 
                                                          blood alcohol concentration 
                                                          (BAC). They merely provide 
                                                          an estimate based on 
                                                          your breath. A blood 
                                                          sample is required for https://experience.tripster.ru/experience/Saint_Petersburg/38130-bilety-v-isaakievskij-sobor/
                                                          an accurate analysis. 
                                                          Based on their unreliable 
                                                          reputation, some states 
                                                          don't allow data acquired 
                                                          from breath analyzers 
                                                          to be presented as evidence 
                                                          in court. 
                                                          
                                                          A major problem with 
                                                          some machines is that 
                                                          they not only identify 
                                                          the ethyl alcohol, but 
                                                          also other substances 
                                                          similar in molecular 
                                                          structure. Simply put, 
                                                          they have a hard time 
                                                          differentiating between 
                                                          alcohol and non-alcoholic 
                                                          substances on a molecular 
                                                          level. Even substances 
                                                          in the environment such 
                                                          as smog or humidity 
                                                          can lead to false BAC 
                                                          readings.