What is the principle of baggage security instrument?

The detection principle of the equipment is divided into two types, including ion mobility and fluorescent polymer.

Traditional ion migration: for the ionization of the detected substance molecules, the time and speed of migration in the electric field are different from those at the end of the electric field to the sensor due to the difference in mass and charge. By comparing these parameters with the database, whether the ion belongs to dangerous ion can be detected.

Fluorescent polymer technology: In order to solve the problem of false positive, a special film material is used, which can only react with the molecular structure of various explosives. Therefore, in theory, fluorescence technology will not have false positives, but unlike ion migration technology, it can only detect explosives by upgrading the database.

Extended data:

When entering the airport, security personnel should stick explosion-proof test paper on everyone's bag or body and collect sample information of suitcases and backpacks. If people have been exposed to explosives, traces of explosive particles (nitrate ions) will remain on their bodies.

These particles will stick to the test paper, which will be inserted into the explosive detector. If there is something wrong with the machine, it needs further inspection. Some special types of work, such as mining, escort, props for film and television crews, and soldiers, have special safety certificates when they come into contact with explosives.