YXW-99D static image particle analyzer is an instrument specially used for analyzing particle size and shape. It gains the particle information through elaborately designed optical microscope and professional lens of camera. It tests particle size, distribution and particle shape characteristics by adopting the technology of image analysis with computer. The instrument has outstanding characteristics including easy operation, clear image, intuitional test, high resolution (high as 0.1µm/picture element) and extensive application, etc. It can be used in colleges, universities, research institutes and large and mediums-sized enterprises for new products developing, quality and technology controlling.