A device called an alcohol detector measures the amount of alcohol in your blood.
Users only need to blow into a straw that is connected to the device for a few seconds in order to obtain a blood alcohol content (BAC) reading. The device then estimates the amount of alcohol in a person’s system by using the vapors their breath contains. This simple method is made possible by the fact that alcohol is merely absorbed through various bodily areas rather than being digested. The mouth, stomach, and intestines are among them. Because of this, even minutes after drinking, remnants of the cloth can be found, allowing the breath analyzer to determine an exact value.