Conductivity salt density testerIt is a measuring instrument developed for anti pollution flashover detection in power systems, used to measure the equivalent attached salt density (hereinafter referred to as "salt density") on the surface of insulators. It can also measure the conductivity and temperature of solutions. The whole machine is widely used in power, teaching, scientific research and other related industries due to its high measurement accuracy, intuitive reading, large measurement range, and convenient use. The classification of pollution levels and the drawing of pollution level distribution maps are the basis of anti pollution flashover work, and accurate pollution level distribution maps are the basis for selecting the creepage distance of electric porcelain outer insulation for transmission and transformation equipment. The equivalent attached salt density value on the surface of insulators is a quantitative data for judging the severity of pollution on electric porcelain outer insulation, and is one of the important criteria for dividing pollution levels and drawing pollution zone maps. Therefore, salt density measurement work is of great significance for the safe operation of the power system.