The measurement of Surface Tension is important in the development and quality control of such things as oil, ink, soap, detergent, pharmaceutical compounds, adhesives and a wide range of coatings. There are several methods used for measuring surface tension. The most common is a technique developed by P. Lecomite duNouy and popularized in a paper published in 1925. The technique has become known as the duNouy Ring Method. Kailian Yongrun uses this method in model KL681 Automatic Tensiometer. Besides duNouy Ring Method, there is another technique called the Wilhelmy Plate Method.