Precision water drop angle tester is mainly used to measure the contact angle of liquid to solid, that is, the wettability of liquid to solid. This instrument can measure the contact angle of various liquids to various materials. It can measure the contact angle of various liquids to various materials, such as bulk materials, fibrous materials, textile materials, etc., and powder samples can also be measured after tableting. It plays a very important role in the scientific research and production of electronic cleaning, petroleum, printing and dyeing, medicine, coating, spraying, mineral processing and other industries.