A strain gauge is a device that converts the mechanical deformation of the body into an electrical signal, which allows one to determine the level of stretching and compression of the body. The load cell is one of the main elements of high-precision weighing equipment. The quality and accuracy of the entire weighing device depends on its quality, accuracy class and configuration.

The strain gauge is structurally a metal (steel or aluminum) structure with a strain gauge, most often it is foil or aluminum wire of small cross-section. The resistor responds to changes in constant resistance at the contacts as a result of the action of uniform compression.