Breathalyzer or The alcohol detector is an instrument used to detect whether the human body has ingested alcohol and how much alcohol has been ingested. It can be used as a detection tool for traffic police to detect the amount of alcohol consumed by drinking drivers during law enforcement to effectively reduce the occurrence of major traffic accidents; it can also be used in other occasions to detect the alcohol content in the human body’s exhaled breath to avoid casualties and major property losses, such as Some high-risk areas prohibit enterprises that work after drinking