There are several types of EAS sensors, includeing:
●Magnetic system-Magneto-harmonic
●Microwave system
The major type is RF(Radio frequency) system and AM (Acousto Magnetic)system. Nowadays they are mostly widely used in various retail industries.
RF sensor(Radio frequency sensor) takes 8.2Mhz Radio frequency technology. It is the most widely used system in the world today. RF labels and RF tags are making smaller size. The RF label, is basically a small disposable electronic circuit with antenna. When a product attached with a RF label, pass through the gate area, the label will response a specific frequency emitted by the transmitter, then the response will be received by the adjacent receiver and trigger an alarm. After a Deactivatable RF label is decoded by the cashier, it will become invalid, then the RF sensor will let it pass. deactivated