As a bookstore owner, it is particularly important to choose a book anti-theft device. Nowadays, there are a wide variety of book anti-theft devices of various brands and styles on the market. The quality is also uneven. Consumers often find it difficult to choose because they are faced with too many choices. Because if you buy bad products. It tends to produce a higher false alarm rate. That is really miserable. Is there a blind spot in the book anti-theft device? Why doesn't it sound sometimes? The editor has compiled the following content to choose tips for you:
Book anti-theft
1. EAS products are divided into acoustic and magnetic anti-theft devices and radio frequency anti-theft devices. The sound magnetic book anti-theft system has higher performance, and of course the price is higher.
2. The natural frequency of the design is different. The natural frequency of the radio frequency anti-theft buckle is 5.2MHz, and the natural frequency of the acousto-magnetic anti-theft buckle is 58KHz. Of course, a certain deviation is allowed in actual production. Generally, the deviation of high quality does not exceed 1.5%.
3. In terms of appearance and shape, generally speaking, radio frequency anti-theft buckles are square and round, and acoustic and magnetic anti-theft buckles are long strips. However, nowadays, there are also interspersed use in appearance and shape, and there are also long strips of radio frequency, but the personality is poor. Acousto-magnetic also has a round shape. Therefore, it is difficult to distinguish whether it is radio frequency or acousto-magnetic anti-theft buckle by looking at the appearance.
4. The testing equipment used is different, the radio frequency must use the radio frequency detection system, the acousto-magnetic must use the acousto-magnetic detection system
5. The shielding performance is different. Acousto-magnetic has a longer wavelength, strong penetrating power, and better shielding ability, while the radio frequency is easily shielded by the influence of metal and tin foil, resulting in underreporting.
6. The detection distance is different. Generally speaking, the detection distance of acousto-magnetic is wider than that of radio frequency.
Radio frequency anti-theft device, the performance is relatively higher than the false alarm rate. That's what everyone asked-why the book anti-theft device sometimes doesn't sound. The requirements of the radio frequency system on the working environment and several factors affecting the system are as follows:
A. Environmental requirements:
1. There should be no large-area metal objects and 220V open wires within 1.5M around the system;
2. The installation distance of the decoder should be more than 1.5 M away from the system;
3. The spotlights used around the system should be far away (above 1.5M)
B. Influencing factors:
Active: electric sparks; high-power electrical appliances such as motors, hair dryers, and electric drills; high-voltage spotlights; ignition caused by poor contact.
