EAS system is mainly composed of anti-theft antenna, charge demagnetizer and magnetic strip. The auxiliary magnetic stripe detector is also composed. Comparison of performance index.
1. Detection rate
The detection rate refers to the number of alarms when the unit number of valid labels pass through different positions in the detection area in different directions about EAS system.
Radio frequency: for daily use, the radio frequency system because of soft label of EAS system is a ring coil type, if the protected goods have tin foil or metal components, it will lose the alarm effect, and the comprehensive alarm rate is low. Generally 60-80%;
Electromagnetic system: Because the consumables used are magnetic strips, they are not affected by foil or small metal components, and the alarm rate can be between 95%.
2. Interference ability
The most severely affected by metal shielding are radio/RF systems, which may be one of the main limitations of radio/RF performance in practical use. Electromagnetic wave system will also be affected by metal items, when the bulk metal into the electromagnetic wave system detection area, the system will appear "stop" phenomenon, when the metal shopping cart, shopping basket passed, even if the goods inside have a valid label, it will not produce an alarm because of shielding.
3. Protection width
Shopping malls need to consider the protection width of the anti-theft system, so as not to narrow the width between the supports, affecting the access of customers. Besides, malls want more room for entrances and exits.
The electromagnetic system is generally installed with a width of 75-120 cm, and the radio frequency is 90-160 cm
4. Types of protection
From the protection range of the entire department store, because many small commodity wrapping paper in the supermarket contains tin foil or metal components, the RF system protection soft label is easy to shield the alarm, the number of protected goods is relatively small, and the type of electromagnetic system protection is greater than the RF system.
5. Price considerations
The price of anti-theft antenna of electromagnetic system is higher than that of RF system;
The price of electromagnetic system consumables is much less than that of RF system consumables;
