Alcohol Breathalyzer

Any interested in science here. If a person drinks one cup of whiskey, then immediately made the test, this register does alcohol through "smoke"? Or is it the camera somehow the difference and only record the actual acohol is absorbed into the blood? How?

There is a mathematical relationship between the amount of alcohol in the lungs and the amount of alcohol in the blood and can be manipulated to determine how much alcohol in the blood without drawing any. All alcohol testing device measures alcohol in the breath and use this formula to calculate the amount of alcohol in the blood. Consequently, all devices have a mouthpiece through which the test subject blows air and a sample chamber to hold air.

The breathalyzer detects alcohol by monitoring a chemical reaction that produces a color change. In addition to the spokesperson and the chamber of the sample, it consists of two glass bottles to contain the chemical reaction and a system of photocells connected to a meter. Air is bubbled through a vial containing a mixture of chemicals and in another vial. From this bottle, the air is passed over the photocells if the meter can measure the color change and to calculate the BAC.

It actually measures the amount of alcohol in the air from your lungs. This is the amount you drank earlier that has already been metabolized in your system.
Although fairly accurate, the most sure-footed measuring the level of alcohol in the body is a blood pure and simple.