Kai-day science and technology professional experience and academic R & D team who support the establishment and formation of the company, the main plasma plasma cleaning machines, plasma surface treatment, surface modification of equipment and accessories, while also producing droplets angle tester. Device applications include: glass, LCD & LCM flat panel displays, semiconductors, mobile phones and laptops and shell buttons, CCD camera and digital camera components, Si, InP, GaAs wafers, chips, fiber, circuit boards, X-ray lenses, UV / IR lenses, optical head components, optical components, precision molds, precision instruments and packaging, printing, textiles, plastics, biological materials, medical utensils, environmental protection equipment and other industries. Angle drops the basic principle: the definition of electronic angle of water droplets in the solid, liquid and gas at the interface of the three-phase, gas - and solid-liquid interface - the interface between the liquid phase angle, the contact angle is to show scale solid surface humidity, Most of the material the use of solid droplets were measured, low contact angle indicates high humidity (hydrophilic), the surface is easy to paste. Contact angle of the liquid with the flat solid surface in contact through the liquid - measuring out the contact point and the end point of the solid surface in the gas junction drops curve - solid. For liquid to solid wettability by measuring the contact angle of a liquid on a solid, calculating, measuring liquid adhesion to a solid, solid surface tension and energy and other indicators. The instrument is widely used in petroleum, chemical, pharmaceutical, paper, dyes, etc., for scientific research and teaching institutions. The machine uses imported components, and application of micro-control technology will be ingested into a computer to save the image, analysis and printing. Speed ??fast, accurate data, easy to operate. Drip methods: intravenous method, changes in droplet method.