Drop angle is defined as the solid and liquid. Three-phase interface of gas, gas - liquid interface and solid - liquid interface angle between the water droplet angle display scale solid surface humidity, the use of most of the sessile droplet was measured, a low contact angle indicates high humidity ( hydrophilic) surface easy to paste. High contact angle of water droplets display shows the surface hydrophobic, organic surface contamination is heavy or poor surface adhesion. And a flat solid surface like the contact of the contact angle of the liquid contact angle SDC-900, through a liquid - measuring out the end of the gas and solid surface in droplets junction point of contact curve analysis of surface cleanliness SDC-200 contact angle - solid The contact angle is the display scale solid surface humidity, the use of most solid objects on the measured contact angle of droplets, low contact angle indicates high humidity (hydrophilic and hydrophobic) SDC-300 contact angle, surface energy is low. How soon after the drop to the measurement reaches up contact angle of water drops on objects resting state takes time, this time is very short, meter drop small, basically negligible. If the contact angle measurement dynamic contact angle measurement function, see the contact angle was measured value can be stabilized. Usually within 10 seconds to test SDC-90 contact angle tester, Sheng Ding instrument (online consultation), the contact angle provided by the Dongguan City Ding Sheng Precision Instrument Company. 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.