Material particle size analysis method to have many, has developed and produced more than 200 kinds of analysis based on various works Dongguan contact angle measuring device tester, and there are always new particle size measurement methods and instruments developed. Although a variety of methods of particle size analysis, basically can be summarized as the following method. The traditional methods of measuring particle sieving, microscopy, sedimentation, electric induction method contact angle tester sales method developed in recent years with a laser diffraction method, laser scattering method, photon correlation spectroscopy, electron microscopy image analysis law, step-based particle size measurement method of Brownian motion and mass spectrometric method. Wherein the laser scattering method and photon correlation spectroscopy method because of high speed, wide measurement range, the data is reliable, reproducible, high degree of automation, ease of on-line measurement, etc. are widely used. (Particle size analysis with length proportional to the size of the surface tension meter F boundaries of MN. Can be written as F = σL or σ = F / L. The ratio σ instrument called surface tension coefficient, its unit commonly dyn / cm. In value on the surface tension of liquid meter coefficient is equal to some semblance adjacent to each other between the two traction unit length. film surface tension meter coefficient = film appearance can / film surface tension meter area = F / (2 * segment length taken) The surface tension coefficient of the liquid nature of the instrument, the size has nothing to do with the surface. Dongguan contact angle tester, ShengDing instrument (certified), contact angle measurements provided by the Dongguan Sheng Ding Precision Instrument Co., Ltd., Dongguan City, Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) is Dongguan, Guangdong, dedicated instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In ShengDing leadership with instruments staff warmly welcome all inquiries negotiations to create ShengDing instrument a better future.