Category for specialized equipment that precisely measures the surface tension of liquids. Adopts measurement principles such as pendant drop method, Wilhelmy method, and du Noüy ring method, used for evaluating surfactants, quality control of paints and inks, and physical property evaluation of chemicals. Unlike contact angle meters, these are specialized for quantitative measurement of surface tension values, including models with temperature control functions and automatic measurement systems. Essential analytical equipment for quality assurance and research and development in chemical industry, paint manufacturing, and food processing.