Force measuring instruments have various structural forms, but their main part is a curved elastic steel sheet or spiral spring. When an external force deforms the elastic steel sheet or spring, a transmission mechanism such as a lever drives the pointer to rotate. The position where the pointer stops on the dial is the value of the external force.

A force measuring instrument is an instrument made of the elasticity of metal and marked with a scale to measure the magnitude of the force. With the progress of science and technology, the application of force measuring instruments is increasingly widespread, commonly used in pharmaceutical, cosmetics, food, packaging, automotive, electrical, electronic, mechanical and other industries.