The professional breathalyzer is a tool for rapidly measuring the concentration of alcohol in the exhaled air by patients with clinical suspicion of alcohol intoxication. The specific version for Occupational Medicine with the Medical CE is available as required by the Law and the version with integrated printer for law enforcement agencies is available. The breathalyzer measures the concentration of alcohol in the blood by analyzing the air exhaled from the lungs, in fact a part of the alcohol present in the blood begins to be eliminated through the latter; the amount of alcohol eliminated in this way is directly proportional to the percentage of alcohol present in the blood and therefore the analysis of the exhaled alveolar air can provide a precise assessment of the alcohol level.