With the wide application of radiation equipment in the fields of nuclear power, X-ray equipment and medical radiation, the requirements of radiation protection have been paid more and more attention. Wyi Technology is committed to radiation detection and prevention, and launched a personal dosimeter GM-100 series for personal safety protection, using all-metal GM counter imported from Russia. The sensor has a long life, stable data, and high quality. The characteristics of good consistency have also been used by many European and American companies to develop radiation detection instruments such as personal dosimeters.