General use of field strength meter (electric and magnetic fields) and spectrum analyzer to test. Test instruments and methods can refer to national standards or regulations (GB 8702-88 electromagnetic radiation protection regulations, GB 9175-88 environmental electromagnetic wave health standards);
Radiation type requires a professional instrument to detect. Computer radiation detector. These radiation is not how big. There is no need to worry too much. Qualified chassis is able to block the vast majority of radiation. Computer radiation is the biggest keyboard and monitor. Because the keyboard under the printed circuit board is basically exposed. Monitor radiation is not school computer distance from pregnant women 1 meter away.