Electrophoresis (electrophoresis) in the electric field force, the charged particles in the suspension system for mobile phones directional migration angle meter drops, particle size and particle size mobility related to its mobility by measuring the particle size can be calculated. Electrophoresis can measure less than 1 ?? m of particle size droplets angle measurement, but only to obtain an average particle size, it is difficult to measure the particle size distribution. Fisher method (fisher? Method) Fisher method first law of the land belonging to the steady flow of gas (laminar) state. Under constant pressure, the air first through the measured particle? Accumulation body, and then flows through an adjustable needle valve atmosphere. According to the air flow resistance and stole particles generated during accumulation body surface area can be obtained and the average size of the particles. Fisher method is a relative measurement method, size book called the Fibonacci average particle size, can not accurately reflect the true size of the particles, nor other particle sizing methods and the results were compared, not accurately reflect the true particle size nor other particle size measurement methods and results obtained were compared, only used to control the process and product quality. Typical products are the United States Fisher Number sieve grade powder tester. New Progress in particle size analysis of nanomaterials with a wide range of applications in the field of high technology industries heart, defense, medicine and other wetting angle of water droplets ShengDing angle measurement, particle measurement technology will lower measurement limit, wide measurement range, measurement accuracy and accuracy, reproducibility and good direction. Therefore droplets angle, particle measurement technology requirements are also increasing. Looking at the various particle measurement methods and techniques, to meet the higher requirements of particle size analysis, light scattering method, based on the Brownian motion of the particle measurement methods such as particle size and mass spectrometry analysis methods will be more complete and more widely used. To suit the needs of the development of nanotechnology, particle size analysis methods nanomaterials gradually become an important part of the particle size analysis. Currently, nanomaterials for particle size analysis method is mainly dynamic light scattering particle size analysis and photon correlation spectroscopy, the measurement of the smallest particle size of 20nm and can reach 1nm. Droplets angle measurement ShengDing _ _ droplets droplets corner angle provided by the Dongguan City Ding Sheng 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. The company better work attitude and constantly improving innovative ideas will lead ShengDing instrument and you hand into the brilliant, for a better future!