The use of high-radiation stone materials for home decoration is undoubtedly a "leading wolf into the room". How can ordinary people know the level of radioactive elements in stone? The geophysical department of the University of Geosciences has recently developed a convenient and fast stone radioactivity detector. Direct qualitative measurement of stone board samples, as well as measurements of panels or walls that have been installed indoors to determine the level of radioactivity in the panels used. Generally, natural stone contains radioactive elements radium, thorium and potassium. According to the level of radioactive elements, natural stone is generally divided into three categories (referred to as A, B, C). Class A stone has the lowest radioactive content and its use range is not limited. It can be used for floor and wall decoration. Class B stone radioactive elements are higher than Class A and cannot be used for interior decoration, but can be used for interior and exterior finishes of other non-residential buildings. The content of radioactive elements in Class C stone is higher than that in Class B. Therefore, it must not be used for interior decoration of living rooms, nor can it be used for interior surfaces of other buildings, and can only be used for exterior finishes of buildings. Our interior decoration should choose stone products with radioactive content of Class A. There are two methods for determining which category the stone belongs to. One is quantitative measurement. After crushing the stone sample, the content of radioactive elements radium, radon and potassium is measured and analyzed, and then it is calculated to determine which category it belongs to. However, it usually takes 25 days to produce results, which takes a long time and the measurement cost is also high. Shangqiu Jinda Tools Co.,Ltd , https://www.jindameasuring.com