Intravenous contact angle measurement, Conghua contact angle measurement, ShengDing instrument (View) provided by the Dongguan City Sheng Ding Precision Instrument Co., Ltd .. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.gdshengding.com) is a specialist in the "contact angle measurement, tensile tester, drop angle detector, tables, interface equipment," the company. Since its inception, we adhere to the "honesty, sound management" approach, the courage to participate in healthy competition in the market, so that the "" brand has a good reputation. We adhere to the "service first, customers first" principle, so ShengDing instrument has won the trust of customers congregation in chemical instrumentation, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! The so-called contact angle is the temperature drops a droplet contact angle measurement on a solid horizontal plane, solid appearance on solid - liquid - gas three-phase bordering point, the gas - liquid interface and solid - liquid interface of two tangents to liquid sandwiched therebetween when the angle formed. Contact angle measuring instrument used to measure the primary liquid contact angle on a solid, namely liquid wettability of the solid, the instrument can measure a variety of liquid contact angle on a variety of materials. The instrument for petroleum, printing and dyeing, pharmaceutical, coating, dressing and other professional research and production has a very important role. When the droplets in the free space is not affected by the force field, the presence of the interfacial tension and the cylindrical ball. However, when the planar contact with the solid droplet contact angle measuring instrument manufacturers, which ultimately depends on the shape of the droplet and the relative size of the internal cohesion of the adhesive force between the droplet and the solid. When a droplet placed on a solid plane, the droplets can automatically start to shop in a solid appearance, or the appearance of a solid contact angle of droplets must exist. Droplet height / width method is an overall drop method. When consideration is summarized accounting entire droplet shape is not part of, so when the shape of the droplet was disturbed when other objects direct contact angle measurement instrument, such as a needle placed in a droplet, it will affect the accuracy of the approach, and even longer applies. The contact angle is defined as the gas, liquid and solid at the intersection by gas - liquid interface tangent and solid - liquid junction angle θ between the lines, is a measure of the degree of wetting. If θ90 °, then the solid is liquid repellent, the liquid does not wet the solid that is easy to move on the surface and can not enter the pores. The contact angle of existing test methods are usually two: one for the shape of the image analysis method; the other for the gravimetric method which is often referred to as a wetting balance or osmosis contact angle meter, but the most widely used, the measured value is best or directly with an accurate shape of the image analysis method. Principle of the shape of the image analysis method, the liquid drops on the surface of a solid sample, the shape of the droplets to obtain an image with the camera through the lens of the microscope, then the use of digital image processing algorithms, and some of the images The method of contact angle of droplets calculated calculation of the contact angle is usually based on a specific mathematical models such as the droplet can be regarded as part of the ball or conical, and then by measuring specific parameters such as width / height or by directly fitting to the calculated value of the contact angle. Young-Laplace equation describes the interface in a closed, the relationship between the curvature of the interface with the external pressure difference and interfacial tension is used to describe a liquid droplet axisymmetric contours accurately to calculate the contact angle.