YX-9300S laser diffraction particle size analyzer for non-metallic powder is upgrade model of YX-9300H. In addition to all features of YX-9300H, this particle size analyzer has many automatic features including light path self-alignment, automatic sample feeding, automatic water supply and drainage, ultrasonic timer and water flow rate controller, etc. Powerful functional software makes it user-friendly. Imported semi-conductor laser provides larger power, longer service life as well as better monochromaticity; specially designed large-sized high-sensitivity photoelectric detector is manufactured by technique of large scale integrated circuit; sample feeding mode includes small sample cell and flow cell; full Mie theory is applied and data is processed by several distribution models; integrated circuit with highly precise data transmition and processing improves accuracy, repeatability and test speed.