This machine is a standard analytical sieve that integrates powder classification and liquid filtration; it is suitable for laboratories and quality inspection rooms for accurate analysis of particle size structure of particles and powders, liquid solids content and sundries content testing analysis. It has the characteristics of low noise, high efficiency and high precision. Adopt a new type of special power generator to generate multiple high frequency vibrations and filter samples with high efficiency; standard sieve body ensures high precision of sample analysis; electronic delay device can set the same screening time of the same material according to needs to ensure sample analysis The uniformity of the data minimizes the inspection error so as to make accurate judgments on product quality.