Dynamic contact angle measurement for dynamic contact angle between solid and liquid, using Wilhelmy plate method, and out of the liquid through the platinum film, thereby forming a hysteresis tension ─ displacement curve, then by positioning the curve, using computer control, The measured data storage and printing, for curve analysis to determine the dynamic contact angle. It can be widely for scientific research and production sectors in the field of petroleum, chemical, electronics, metallurgy, water, medicine, paper, printing, teaching, quality supervision, such as testing a variety of liquid surface tension which choose to use dynamic contact angle as the last data of gas and liquid , at the junction of the three-phase gas-solid - liquid interface and solid. - the angle θ is the wetting liquid interface between the measure of the degree if θ90 °, the solid is repellent, that is non-wetting liquid solid, easy surface movement, can not enter the pores wetting process and interfacial tension related. drop of liquid falls on a solid surface, when the equilibrium Kono drip angle measurements, there are several situations when balance, σs, g = σs research contact angle measurement, l + σg powder contact angle measurement, lcosθ called Young's formula that can predict the wetting happens when θ = 0, completely wet; when θ <90 °, partially wet or moist wet; when θ = 90 °, wetting or not the dividing line; when θ> 90 °, non-wetting; when θ = 180 °, completely non-wetting powder contact angle measurement, the United States (online consultation). The contact angle provided by the Dongguan City Ding Sheng Precision Instrument Co., Dongguan Sheng Ding Precision Instrument Co., Ltd. (www.dgshengding.com) (www.dgshengding.com) Dongguan, Guangdong, dedicated instrumentation leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Sheng Ding instrument in leadership with the staff warmly welcome all inquiries negotiations to create Shengding instrument better future.