What is an EAS Tag and how does it work in an EAS System?

An EAS (Electronic Article Surveillance) tag is a security device commonly used in retail settings to prevent theft and protect merchandise. EAS systems are designed to detect the presence of these tags or labels as items pass through designated exit points. The primary function of EAS tags is to trigger an alarm if a tagged item exits the store without being properly deactivated or removed at the point of sale.

Here's how an EAS system typically works with EAS tags:

1. Types of EAS Tags:

  - There are various types of EAS tags, each with its own characteristics and application methods. The three main types are:

    - RF (Radio Frequency) Tags: These tags use radio frequency technology for detection.

    - AM (Acousto-Magnetic) Tags: These tags use acousto-magnetic technology.

    - RFID (Radio-Frequency Identification) Tags: While RFID tags serve a similar purpose, they are more advanced and can store additional information beyond security purposes.

2. Tag Application:

  - EAS tags are attached to merchandise during the manufacturing or packaging process. They can be in the form of hard tags (rigid plastic or metal), labels, or soft tags (fabric-based).

3. Deactivation at the Point of Sale:

  - When a customer purchases an item, the EAS tag needs to be deactivated or removed at the point of sale. This is typically done by passing the item over a deactivation pad or through a deactivation device.

4. EAS Detection System:

  - The store entrance or exit is equipped with an EAS detection system. This system consists of antennas or sensors positioned on either side of the exit.

5. EAS Alarm Activation:

  - If an item with an active EAS tag passes through the detection zone without being properly deactivated, the EAS system triggers an alarm. The alarm can be an audible sound, a visual signal, or both.

6. EAS System Technologies:

  - Depending on the type of EAS system, different technologies are used for detection. For example:

    - RF systems use a transmitter and receiver to create a detection zone.

    - AM systems use a pulsed magnetic field and resonating tag to detect EAS tags.

    - RFID systems use radio frequency identification for both security and inventory management purposes.

7. Anti-Shoplifting Deterrent:

  - The presence of EAS tags and the audible alarm act as a deterrent to potential shoplifters, discouraging them from attempting to steal merchandise.

EAS systems are widely used in retail stores, libraries, and other environments where the protection of valuable items is essential. The integration of EAS tags and systems helps enhance security and reduce theft-related losses.