Views:2 Author:Allen Publish Time: 2019-04-02 Origin:Site
There are many merchants who do not know the difference between the eas AM system and the eas RF system when purchasing the anti-theft device. In fact, the alarm principle and the frequency are different. Therefore, when designing the supermarket anti-theft system, it needs to be rationally used.
Supermarket anti-theft system is generally divided into two types: acoustic magnetic security door(AM system) and radio frequency security door(RF system). Among them, the radio frequency security door(RF system)installed in many supermarkets before. It is applied earlier and is used widely and cheaply. The magnetic security door(AM system) developed later, and the stability and detection rate are better, so the price will naturally be higher.
The RF security door is an electric field that the RF antenna emits a frequency modulated signal and then generates an alert. When a radio frequency tag enters this electric field range, the security door will resonate and alarm.
The acoustic magnetic security door is a resonance phenomenon generated by the tuning fork principle, and can approach an operation of almost zero false alarm. When the frequency of the signal coincides with the oscillation frequency of the tag, the tag will cause resonance and generate a resonance signal; the acoustic magnetic security door will alarm.
Besides the price , other aspects of AM security door are better than the RF security door. First, the store installation width is larger, the distance of the soft label is 1.2-1.6 meters; the detection distance of the hard label is 1.6-2.4 meters, two labels generally higher than RF. And it can achieve wireless synchronization without the need for error frequency. Secondly, the stability and anti-interference performance of the AM security door is better, and it is not disturbed strongly as the RF. The AM security door can be applied to most store environments.
At present, if you have enough budgetto install an anti-theft device, we recommended to buy an AM security door. If less budget, buy RF device, but before you buy it, you should consult whether it is suitable for installation. Otherwise, it will not be worth the loss. If you have any questions, please feel free to contact Nanjing bohang electronics.