Study light scattering method light scattering method (light scattering) is divided into two kinds of static and dynamic and static light scattering (ie, the time-averaged scattering) measurement of scattered light distribution space, dynamic light scattering study law in the scattered light at a fixed spatial location The variation of intensity with time. Mature light scattering theory mainly Fraunhofer (Fraunhofer) diffraction theory, Fresnel (Fresnel) diffraction theory, m (Mie) and Rayleigh scattering theory (Royleigh) scattering theory. Laser particle size analysis is the most major nanomaterials system size analysis methods. When a beam wavelength in a certain size small spherical particles, the diffraction and scattering two phenomena occur for λ laser irradiation, usually when the particle size is larger than 10λ when to diffraction phenomenon based; when the main diffraction phenomenon; when droplet diameter is smaller than the angle 10λ tester, places the main scattering. In general, the sample analysis laser diffraction particle size analyzer only at 5 ?? m or more accurately; and dynamic light scattering particle size analyzer in the nanometer particle size 5 ?? m or less, submicron particles accurate sample analysis. In addition, the theoretical model of laser particle size analysis is based on the particle shape for the autumn, on monodisperse condition, but actually measured particles were more irregular shape and polydispersity. Therefore, the particle shape, particle size distribution characteristics on the final result of the larger particle size analysis, and the more irregular particle shape, particle size distribution is wide, the greater the results of error analysis. What exactly is the surface tension of the instrument, the following summarizes the three major points, for everyone to do an analysis: 1, surface tension meter tangent direction and level, and some of the dividing line, and two straight, if the surface is flat, the surface tension instrument in this plane. If the surface is curved, the surface tension meter is in the section of this surface. 2, the surface tension of the instrument is a reflection of the molecular force. Some divide it occurs in liquids and gases when touched. Because the outer layer of the liquid molecules in particular the resolution. Between liquid molecules and the molecules inside almost immediately, the intermolecular spacing often maintain a balance, a little farther on the attraction, a little closer to repulsion, which, unlike the resolution of the liquid molecules capable of infinite diffusion of gas molecules as water droplets Angular contact angle test, but only near the equilibrium position and rotational oscillations. Appearance of neighboring molecules in the liquid as the liquid inside of the molecule only has obviously been the effect of uneven force, so that the speed of larger molecules out of a very simple level, into steam, resulting in the liquid outer layer (thin liquid gas with a touch of molecular layer) is more rare than the spread within some sub-distribution. Some of the liquid with respect to the sub-spread, they are in a particular case. Repulsion between molecules with the outer surface of the interval between each other decreases with the increase in this particular layer gravitational effects between molecules predominate. So droplets angle measuring instrument, if the liquid looks neat dividing line MN wanton put liquid into a, b two some. F indicates that a some of the molecules in the outer layer b some attraction, Fb showed some right outer layer of molecules of the attractiveness of a somewhat, some force must be the size of the two equal and opposite. This outer layer in some mutual traction between any two promoted the trend of the liquid outer layer has a contraction because of the effect of surface tension meter, liquid appearance always tends to reduce as much as possible, so the air in droplets often cylindrical ball shape. Droplets angle tester, ShengDing instrument (certified), Shanwei City droplets angle provided by Ding Sheng Precision Instrument Company. Dongguan 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. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create ShengDing instrument a better future.