What is the EAS system and how it works

What is the EAS System

The full name of eas is Electronic Article Surveillance. It uses high-tech means to give goods a self-defense ability, which can effectively protect goods and prevent theft of goods. Globally, 90% of the retail industry uses EAS systems to reduce theft rate. In China, the EAS system has gradually been accepted and adopted by the majority of merchants. So far, the majority of merchants believe that the widespread adoption of EAS system is the most reliable and economical high-tech management means to reduce theft, reduce losses.

Information from Wikipedia


How does electronic article surveillance work?

The EAS system consists of three main components: a detector, a deactivator, and an electronic label.
Electronic tags are classified into soft tags and hard tags. Soft tags are cheaper and adhere directly to "hard" products. Soft tags are not reusable; hard tags are more expensive than soft tags but can be reused.
Hard tags must be equipped with special nail removers, which are mostly used for soft, easy-to-penetrate items. Most of the decoders are non-contact devices, which have a certain decoding height. When the cashier accepts the cash or bags, the electronic tag can be decoded without touching the degaussing area.
There is also a device that combines the decoder and the laser bar code scanner so that the collection and decoding of the goods can be completed at one time, which is convenient for the cashier to work. This way, it must cooperate with the laser bar code supplier to exclude the two. Mutual interference to improve decoding sensitivity.
It is a 7.5~8.5MHz FM model transmitted by the transmitting antenna to generate a warning electric field. When the inductive tag enters the electric field, the undecoded product is taken away from the mall, and after passing through the detector device (mostly gate), Trigger an alarm to alert cashiers, customers, and store security personnel to timely processing.

What are the classifications of EAS system?

There are four main technologies in the EAS system, namely electromagnetic, acoustic magnetic and radio frequency identification. They all have their inherent advantages and disadvantages.

Radio Frequency (RF) Systems

Radio Frequency Identification (RFID) is a wireless communication technology that uses radio signals to identify specific targets and read and write related data without the need to identify mechanical or optical contact between the system and a particular target.
The radio's signal is transmitted from the tag attached to the item by an electromagnetic field that is modulated into a radio frequency to automatically identify and track the item. Some tags receive energy from the electromagnetic field emitted by the recognizer when they are recognized and do not require a battery. The tag itself has a power source and can actively emit radio waves (electromagnetic fields modulated to radio frequencies). The tag contains electronically stored information that can be identified within a few meters. Unlike barcodes, RF tags do not need to be within the line of sight of the recognizer, but can also be embedded within the object being tracked.
1. Quick scan. The RFID recognizer can recognize and read several RFID tags at the same time!
2. The size is small and the shape is diverse. RFID is not limited in size and shape for reading and does not need to match the fixed size and print quality of the paper for reading accuracy.
3. Anti-pollution ability and durability. Traditional bar code carriers are paper and are therefore susceptible to contamination, but RFID is highly resistant to substances such as water, oil, and chemicals.
4. It can be reused. Nowadays, barcode printing cannot be changed after it is printed. RFID tags can repeatedly add, modify, and delete data stored in RFID tags to facilitate information updates.
6. The data has a large memory capacity. The capacity of the one-dimensional barcode is 50 Bytes, the maximum capacity of the two-dimensional barcode can be stored from 2 to 3000 characters, and the maximum capacity of the RFID is MegaBytes. With the development of the memory carrier, the data capacity has also been expanding. The amount of information that will be carried in future items will increase, and the demand for capacity expansion of the volume label will increase accordingly.
7. Security. Since RFID carries electronic information, its data content can be protected by passwords, making it's content difficult to be forged and altered.

Electro Magnetic (EM) Systems

The electromagnetic system (Electromagnetic System) uses electromagnetic waves as the detection signal. It has been published at the same time as the radiofrequency system for more than 30 years.
The advantage is that the label is the smallest, the concealment is strong, and the label is cheap, and the degaussing can be repeated, which is suitable for the protection of specific products such as books. The application environment is mostly in libraries, libraries, audio-visual stores, etc.
Acoustic magnetic system tuning forks only cause resonance when the oscillation frequency is the same. AcoustoMagnetic is the application of this physical principle to achieve almost zero false positives. When the acoustic magnetic system tag attached to the product enters the detection area of ​​the system, resonance occurs, but the system will only issue an alarm after the receiver receives four consecutive resonance signals (every 1/50th of a second).

Acoustic Magnetic (AM) Systems

The characteristics of the acoustic-magnetic system are high anti-theft detection rate, almost zero false alarm, no metal foil paper shielding, good anti-interference, and wide exit protection (the single system can protect 4 meters wide).
Electromagnetic (EM) systems are used by retail chains, supermarkets, and libraries around the world. Using this technology, a magnetic strip with iron and a sticky layer is applied to the surface of the product. It is not necessary to remove this magnetic strip when you check out - the scanner can be disabled by using a specific strong magnetic field. A big advantage of the EM magnetic strip is that it can be reactivated and the cost of use is low.
Most people say that the electromagnetic tag is a metal coil or metal strip with a very high magnetic permeability, which makes the magnetic signal flow easily. “When we drive the tag, the electromagnetic flow will be allowed to pass through the tag until the flux in the tag is saturated,” he said. “When the tag is saturated, it is magnetically no different from air. Saturation occurs momentarily, which is very important in the design of the label."


The EAS system itself is a high-tech product. Its beautiful appearance and sophisticated production technology can be integrated with the modern and magnificent decoration to achieve the effect of “icing on the cake”, protecting the products and beautifying the environment of the shopping mall. It is a high-end shopping mall, large and medium-sized supermarkets showing the economic strength and technological content of the iconic equipment, which is the inevitable trend of the development of modern shopping malls.

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