The open and lock forces of bottle caps are important online and offline production parameters. They can influence the transportation and consumption of products. NJY-20 Digital Torque Tester is designed to measure the open force and lock force of the caps of bottles, spout bags and flexible tube packages. Its great stability and precision makes it a necessity for the manufacturing process. This instrument conforms to various national and international standards: ASTM D2063, ASTM D3198, ASTM D3474, BB/T 0025, BB/T 0034, GB/T 17876.