​Lifangmei Technology EM Electromagnetic Protection System: 1.042 KHz frequency, unaffected by metal interference

In the EAS security field, AM (sound-magnetic) and RF (radio frequency) are the two mainstream technologies. However, Lifangmei Technology's product catalogue also offers a third technology option - the EM (electromagnetic) security system. This technology operates at a frequency of 1.042 KHz, has a detection range of less than 90 centimeters, and is not affected by metal materials. It is suitable for specific retail scenarios.

Characteristics of EM Technology

According to Lifangmei Technology's product catalogue , the main parameters of EM technology are as follows:

Working Principle of EM Technology

EM technology achieves label detection through low-frequency electromagnetic fields. When a demagnetized label enters the detection area, the system will not trigger an alarm; while an un-demagnetized label will interfere with the electromagnetic field and be recognized by the antenna, triggering an alarm. Due to the low frequency, the detection distance of EM technology is relatively short (less than 90 cm), but it is also less susceptible to interference from metal items.

Comparison with Other Technologies

Advantages and Limitations of EM Technology

Advantages:

Not disturbed by metal shelves or display cabinets

The soft label is narrow and flat, making it easy to conceal.

The system cost is relatively low.

Limitations:

The detection distance is short, and the channel width should be within 1 meter.

Not applicable to large stores with wide entrances and exits

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