Electromagnetic radiation safety standards and detection methods

I. Electromagnetic radiation safety standards

Class 1 standard (safety standard, no effect on human body)
High frequency radiation less than 10 μW/cm²
Low frequency radiation less than 10 V/m
Class 2 standard (intermediate zone, safe for human body)Harmful effects)
High frequency radiation less than 40 μW/cm²
Low frequency radiation less than 25 V/m

Second, household appliances are generally electromagnetic low-frequency radiation, and base stations are high-frequency radiation.Therefore, when testing, low frequency and high frequency should be detected together.It is recommended to buy LZT-1000 and LZT-6200

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4. The news bai of the 13 central programs "Common Concern" has smashed the rumors of base station radiation, and the base station radiation is very small, 100 times lower than the national standard radiation value.
3G, 4G and other wireless networks use cellular mobile communication technology, which requires many base stations on the ground, and each base station is responsible for communication in an area, so as to ensure that mobile phones can quickly connect to nearby base stations for communication anytime, anywhere.Cheng Jing, a telecommunications engineer, explained that the signal propagation of the communication base station is a kind of straight-line propagation, and the signal will be seriously fading due to the blockage of buildings.For communication services, it is necessary to build base stations in residential areas.
The radiation generated by electromagnetic energy can be divided into ionizing radiation and non-ionizing radiation. The former refers to a high-energy radiation that can destroy physiological tissues and cause harm to the human body.Such as X-rays, nuclear radiation, etc.; the latter generally only have thermal effects and will not damage the molecular bonds of the organism. The radiation generated by the base station belongs to this category and will not be harmful to the human body.
In fact, in order to strengthen the management of electromagnetic environment,To protect public health, in 2014, China integrated and revised the "Regulations on Electromagnetic Radiation Protection" (GB 8702-88) and "Environmental Electromagnetic Wave Hygiene Standards" (GB 9175-88), and issued the "Electromagnetic Environmental Control Limits" (GB8702-2014), and was officially implemented on January 1, 2015. According to this standard, the power density of the communication frequency band should be less than 40 microwatts/square centimeter, and the standard in the United States is 600 microwatts/square centimeter, a difference of 15 times between the two.According to industry insiders, considering that the base station signals will be superimposed on each other, the construction of mobile communication base stations is now one-fifth of the national standard, that is, less than 8 microwatts/square centimeter.

At present, science cannot explain the relationship between long-term radiation exposure and cancer, and cannot provide relevant evidence.It can be explained that the maximum power of the antenna of the mobile signal transmitting station (base station) is 20 watts, the transmission frequency is 900 MHz (or 1800 MHz), and it is generally in the order of milliwatts when it reaches the human body; the maximum transmission power of the mobile phone is2 watts.The radiation from the mobile phone will be far greater than that of the base station when using a mobile phone.
There is radiation, but it is within the national safety standards and will not have any adverse effects on the human body.The transmission towers of the communication facilities are all built with the approval of the local environmental protection bureau.
Experts say that although the term electromagnetic radiation pollution is a bit strange, it is very common in our lives.Pollution sources that can produce electromagnetic radiation pollution are everywhere, including TV and broadcasting towers, radar stations, communication transmitters, substations, high-voltage wires, computers, mobile phones, microwave ovens, electromagnetic cookers, and even the subway trains we take.Create electromagnetic radiation pollution.
Experts told us that some cities have TV towers, because TV towers are hundreds of meters high, and the radiation area has exceeded the height of residential buildings, which will basically not affect the health of citizens.Some high-rise buildings have antennas, such as parabolic antennas, cell phone base stations and paging station antennas. These antennas have limited power and are controlled by the local radio management committee, which has little impact on residents.
China Unicom, China Mobile, China Telecom and other signal transmission towers.The height of the signal transmitting tower is generally more than 45 meters, while the height of the general residential building is about 21 meters.
Europe and the United States have conducted a large number of surveys and statistical analysis. The scale of each survey varies. The number of respondents at one time is thousands, tens of thousands, hundreds of thousands or even millions.The survey locations are in the field, for example, near power lines, near substations, subway stations, electric trains; or in factories, laboratories, offices, and residential homes.The investigation spanned more than ten years or even decades.
A large number of survey results convince that the probability of the occurrence of various tumor lesions in the human body is closely related to the exposure to low-frequency magnetic field radiation.Experts in many European and American countries and some government agencies are convinced that low-frequency magnetic fields can significantly increase the incidence of the following diseases: leukemia and leukemia (especially for children), cancer, birth defects, breast cancer, brain tumors,Malignant lymphomas, tumors of the nervous system, development of astrocytes, chronic myeloid leukemia, chromosomal aberrations, etc.Some reports also pointed out that the decrease in the secretion of certain hormones under the action of electromagnetic fields may also be the cause of the development of breast tumors.Some survey reports also pointed out that people who are often exposed to electromagnetic radiation are at greater risk of breast cancer if they are exposed to high temperature.
If you have frequent headaches, you can ask the people you live with to see if they have symptoms similar to yours. If there is, it means that the problem is with the signal tower. If not, it is another problem.You can move out to check it out.

V. Baidu video search: base station radiation

https://haokan.baidu.com/v?vid=11918979769462732044&pd=bjh&fr=bjhauthor&type=video