To be easily, the machine has x-ray tank, can release x-ray beam. The beam penetrate the baggage, and received by the detectors on the other side. The detectors collected the xray signal and transfer to the computer, and the software will show it by a image. We can see the image on the monitor and k

The EI means EASTIMAGE, it is the brand name and short company name. The numbers means the tunnel size, 5030 means 50cm W x30cm H, 100100 means the tunnel size is 100cm Wx100cm H.The last number means different configuration of the same size machine, 5030C, and we also have 5030A, they are different

X-ray machines are different mainly in the tunnel size. Small size to check hand held bags, because the tunnel is small. Big bags can not pass through.Middle size and large size can check bigger luggage and cargo, they are used in different places.