In the application of industrial Internet of Things, industrial routers are key devices for data transmission, and their performance and security are of great concern. Among them, the radiation safety distance is one of the many factors to be considered. The following is a detailed explanation of the radiation safety distance of industrial routers.

First of all, it needs to be clear that the electromagnetic radiation of industrial routers mainly comes from their transmission power. The greater the transmission power, the wider the transmission range of the router, but at the same time, the stronger the electromagnetic radiation generated. However, this does not mean that the higher the transmission power, the better. Excessive transmit power not only increases energy consumption but also may have potential effects on human health.

In order to protect human health, countries have strictly regulated the transmission power of wireless devices. In China, the transmission power of wireless routers generally needs to be within the 100mW range specified by the state, that is, within the 20dBm 2.4GHz frequency band. This regulation ensures that the electromagnetic radiation level of wireless devices during normal use will not cause harm to human health.

So, in practical applications, how to determine the radiation safety distance of industrial routers? This mainly depends on factors such as the router's transmit power, antenna gain, and usage environment. Generally speaking, the electromagnetic radiation power density value is higher at the antenna that is close to the router, but as the distance from the router increases, the electromagnetic radiation will rapidly attenuate. Therefore, under normal use conditions, as long as a certain distance is maintained, the impact of electromagnetic radiation on the human body can be effectively reduced.

Specifically, for small wireless routers, the electromagnetic radiation power density value may be between 1.1 μW/cm2 and 13 μW/cm2 at the location close to the antenna. However, when the distance is 50 centimeters from the router, this value has decreased to between 0.024 microwatts per square centimeter and 0.14 microwatts per square centimeter, far below the national limit. When the distance is further increased to more than 1 meter, the electromagnetic radiation power density value is already below the lower limit of the test of conventional electromagnetic radiation testing instruments, and basically has no effect on the human body.

For industrial routers, due to their relatively high transmission power, it is necessary to maintain a safe distance when using them. But similarly, as long as the appropriate power and gain antenna products are selected, and as far as possible in an open area, the impact of electromagnetic radiation on the human body can be minimized.

The radiation safety distance of industrial routers is not a fixed value, but depends on the combined effects of various factors. In practical applications, it is recommended to determine the safe distance reasonably according to the router's transmission power, antenna gain, and usage environment, as well as relevant national regulations, to ensure that human health is not affected.