The CLJ-BII (G) dual flow laser dust particle counter is a professional measuring instrument used under the guidance of the Medical Polymer Product Quality Testing Center of the National Medical Administration to test the air cleanliness level in cleanroom workshops according to YY/T0142-94 standard. Compliant with the technical requirements of JJF1190-2008 "Dust Particle Counter Calibration Specification" issued by the State Administration of Metrology, the entire machine function is controlled and processed by a microcomputer, and the test results can be directly printed.