In real life, there are many areas such as energy, materials, pharmaceutical, chemical, metallurgy, electronics, machinery, light industry, construction and environmental protection are all closely related molecular materials with particle size. In polymer materials such as polyethylene resin is a multi-pores of the powdered substance, its properties and performance not only by the molecular characteristics (molecular weight, molecular weight distribution, chain configuration) impact, and morphological characteristics of the molecule (e.g., the particle surface morphology, average particle size, particle size distribution) are closely related. Polyethylene molecules and morphology in turn determines the characteristics and properties of polymer products during molding. Studies have shown that the morphology of the resin particles is good, moderate average particle size, particle size distribution uniform in favor of high-temperature polymer forming a contact angle measuring instrument, so people often need to test PVC resin particle size analysis. Nano-modified plastics additives in the sweet side, add nanomaterials as a filler in plastics plastics, not only can increase the mechanical strength of the plastic, airtight plastic can also increase the performance of gas and increased retardant properties. These reflect the performance of direct and shape, particle size and distribution and other factors add nanomaterials are closely related. Therefore, the need for characterization and analysis of these nano-particle additives. In terms of modern ceramic materials, functional ceramics composed of nanoparticles is an important research direction of the ceramic material. By using nano-functional ceramic material can significantly alter the physical and chemical properties of ceramics, such as toughness. Many important properties of ceramic powder materials by the average particle size and particle size distribution and other parameters of the decision. Coated areas, pigment particle size determines its coloring ability, additive particle size determines the film strength and wear resistance. In the field of electronic materials, the phosphor particle size determine the display brightness and definition television, monitor, etc. of the screen. In the field of catalyst contact angle measurement, the catalyst particle size, distribution and morphology are determined in part its catalytic activity. Thus, with the development of science and technology, about the particle size analysis technology has been widespread attention, has gradually developed into a measure of an important branch of science. Microscopy microscopy (microscopy) is a commonly used method for the determination of particle size. Depending on the particle size of the material, either by using general optical microscope, an electron microscope may be used. An optical microscope for measuring defense 0.8 ~ 150? M, is less than 0.8? M must be observed with an electron microscope. Scanning electron microscopy and transmission electron microscopy to directly observe the size commonly used in 1nm ~ 5? M within the scope of particles in nano materials for particle size and morphology analysis. Microscopy can understand the shape of the particles during the manufacturing process, the particle size distribution is plotted in Fig specific surface, not just the average particle size distribution. However, when using an electron microscope morphology of nano particles were observed in the original contact angle measurement, due to the prevalence of inter-particle van der Waals force and the Coulomb force, the particles are easy to aggregate to form pellets, to bring the particle size measurement difficulties, the need to use a dispersant or an appropriate method of operation for the particles were dispersed. The traditional microscopic method for measuring the contact angle measuring instrument retail, usually microscopic photographs statistical analysis method when a large number of particle size of the particle size distribution. Since the measurement results influenced by subjective factors, the measurement accuracy is not high, and the operation onerous and time-consuming, error-prone. In recent years, integrated image analysis system can quickly and accurately completed microscopy measurement and analysis system in the work. Comprehensive image analysis system for automatic measurement of particle size and automated analysis system. Microscope imaging test particles, and then complete the determination of particle size by computer image processing technology. Image analysis technology for their random measurements, statistics and intuitive is recognized measurement results and the actual size distribution best fit testing technology. The advantage is that you can directly observe whether particle agglomeration. The disadvantage is that a representative sample is poor, poor reproducibility of experimental results, the measurement speed. Contact angle measurement price _ _ contact angle measurement instrument ShengDing provided by Dongguan Sheng Ding Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) strong, credible, in Dongguan, Guangdong specialized instrumentation industry has accumulated a large number of loyal customers. 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