The 3000 series colorimeters are all three-field colorimeters, which are specially designed for visual measurement of chromaticity grading. The left and right sides of the instrument are equipped with a colorimetric disc. The user can compare the standard sample and the two colorimetric discs at the same time by rotating the left and right knobs. , Get the numerical value of the degree of color. It is widely used in petroleum, chemical, food and other industries. The 3000 series includes multiple specific models, Gardner Gardner Colorimeter, FAC Dark Fat Colorimeter, US Armament Resin Colorimeter, EBC Beer Colorimeter and ASTM D1500 Petroleum Colorimeter, each colorimetric game The standard configuration of the corresponding glass colorimetric disc halogen tungsten lamp conforms to the CIE standard, ensuring that the light source conditions are kept constant during the day or night during the colorimetric measurement, and are not affected by the external environment.