The R300 CNC Test Sieve, developed by Zhongren Company, is a high-precision particle analysis screening machine. It features an electronic control panel and benchtop operation. It utilizes standard Ø200 test sieves or Ø75 sample sieves with corresponding fixtures. The machine can be equipped with 1 to 8 sieve layers, allowing the decomposition of a single material sample into multiple particle size fractions.