Contact angle tester; sessile drop method using a step Introduction (θ / 2 method): Start: Start contact angle measurement applications. Drop method steps: First, adjust the level of Petroleum & Chemical ultra-low contact angle, then the sample is placed in the table, the use of micro-injector to adjust the amount of liquid droplets that form droplets in the needle, turn the knob to the table shift, so that the sample surface in contact with the droplets, and then move down the table, you can leave the sample droplets. Click frozen, you can press the following method for measuring the contact angle. The measurement scale shift by clicking on the shortcut button on the left or right or up or down move, measuring tape and tangent to the droplet edge displayed. Then click on the down down the intersection measuring tape coincides with the droplet edge, click the L button interface, the measurement scale side intersect with droplets, and then click to calculate the surface tension of the hanging drop published instrument, you can find the contact angle. There must be two liquids of different polarity, which must from polar liquid and the nonpolar liquid elect a liquid. Testing was not the surface of the solid dissolves, expansion and deformation. In the calculation of the surface energy, you need to dispersion forces liquid A and liquid B, the polarity of the force and the contact angle were measured filled interface. Then press the "OK" key to calculate the solid surface energy. Name: contact angle measurements and oil ultralow interfacial contact angle measurement, interface, Sheng Ding instruments provided by the Dongguan City Ding Sheng Precision Instrument Company. Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (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 into the brilliant and you work for a better future!