EAS is the abbreviation of Electronic Article Surveillance.The EAS system came out in the United States in the mid-1960s. It was originally used in the apparel industry and has now expanded to all around the world. Its application areas have also been extended to various industries such as department stores, supermarkets, and books, especially in large supermarkets (warehouses).
EAS RF SYSTEM
RF is the abbreviation of Radio Frequency,which is also an abbreviation for a high-frequency alternating electromagnetic wave.The alternating current that changes less than 1,000 times per second is called low-frequency current, and the one that changes more than 10,000 times is called high-frequency current. Radio frequency is such a high-frequency current.
The main difference between the AM system and the RF system is that the frequency is different, which results in the different penetration of radio waves (the ability to bypass obstacles).
AM system has low frequency and strong penetration, and has low sensitivity to metal. Some products with metal have a certain protective effect.
Due to the high frequency and poor penetration of RF system, products with metal are almost unusable, such as chocolate and chewing gum.
In general, the RF tag contains coils and springs, steel bowls and steel balls.The quality of the tag is mainly determined by the quality of the coil and the tension of the spring. Coils are generally divided into all-copper and copper-clad aluminum.
Under normal circumstances, the AM tag contains a magnetic bar, and the quality of the magnetic bar determines the quality of the tag, which has a length of 25mm, 33mm and 39mm.
Generally, all EAS tags are magnetic, and all can be opened with a magnetic remover. For some AM super tags, a manual unlocker is also needed to open.
According to different needs, the Gaussian of the remover can be from 4000 to 20000.
This kind of detacher is generally only used to open AM super tags.
Regardless of the AM system or the RF system, the detection distance of hard tags is wider than that of soft labels.
For AM systems, the detection distance of hard tags can generally reach 3 meters, under the circumstances that the surrounding environment and various performances are good.While the detection distance of soft labels is generally more than 1.6 meters, which will be a good performance .
For RF systems, the detection distance of hard tags can generally be up to 2.6 meters, while the detection distance of soft labels can only be up to 1.2 meters.
