The EAS supermarket anti-theft device mainly uses electromagnetic fields or radio frequency signals to achieve anti-theft monitoring of items. Here is how the general EAS system works:
Tag or hard tag: A device that attaches an EAS tag to the product. These tags can be soft tags (such as wearable sticker-type tags) or hard tags (such as plastic or metal tags with nails).
Radio frequency signals or electromagnetic fields: EAS detectors are installed at the entrance or exit of the supermarket. These detectors emit radio frequency signals or create an electromagnetic field.
Activation and deactivation: At checkout, the cashier uses a special device to activate or deactivate the EAS tag. After activation, the tag responds to the detector at the entrance of the supermarket.
Detection and alarm: When an undeactivated EAS tag passes through the detector, the detector senses the signal emitted by the tag or affects the change of the electromagnetic field. If the detector finds that an unactivated tag has passed, it will trigger an alarm or send a warning signal to indicate possible theft.
In general, the EAS supermarket anti-theft device monitors whether the goods are taken out of the supermarket without checkout through the interaction between the tag and the detector. This system helps supermarket managers effectively reduce theft losses and improve the safety of goods.