With the development of science and technology, alcohol analyzers have become one of the important tools for traffic police to detect drunk driving. So, how does a alcohol analyzer tell if a person has drunk alcohol?
We need to understand how an alcohol analyzer works. Alcohol analyzers mainly detect the amount of alcohol in the breath exhaled by the human body to determine whether you are drinking. When a person drinks alcohol, the alcohol enters the bloodstream through the digestive tract and travels to the lungs with blood circulation and is excreted with breathing. Therefore, by measuring the amount of alcohol in the exhaled breath, it is possible to infer the amount of alcohol in the human body.
So, how does an alcohol analyzer do this?
First of all, the alcohol analyzer uses electrochemical sensor technology. This type of sensor consists of two electrodes, called the inductive electrode and the reference electrode. When a gas containing alcohol passes through the sensor, the alcohol molecules undergo an oxidation reaction with the sensing electrode, producing a weak current signal. The magnitude of this current signal is directly proportional to the concentration of alcohol, so the concentration of alcohol can be calculated by measuring the magnitude of this current signal.
Secondly, the alcohol analyzer uses a high-precision measurement circuit. This circuit converts a weak current signal into a digital signal, which is calculated and processed by an internal algorithm. Eventually, the calculated alcohol concentration is displayed on the screen in the form of a number for the traffic police or relevant personnel to judge.
In addition, calibration and maintenance are required to ensure the accuracy of the alcohol analyzer. Typically, alcohol analyzers need to be calibrated before leaving the factory to ensure their accuracy and reliability. During use, regular calibration and maintenance are also required to ensure its performance and accuracy.
Alcohol analyzers are able to tell if a person has drunk alcohol, mainly by detecting the amount of alcohol in the body's exhaled breath. Through the use of electrochemical sensor technology and high-precision measurement circuits, as well as calibration and maintenance, the accuracy and reliability of the alcohol analyzer can be ensured, providing important tools and support for traffic police to detect drunk driving.