F series full bridge | full bridge strain gauge f series full bridge consists of four measuring grids. the metal material for measuring sensitive grids is constantan and the base material is polyimide. The F series full bridge, as its name implies, is a complete Wheatstone bridge composed of four measuring grids. Due to the integration of internal circuits and zero-adjusting terminals, a full bridge can be equivalent to a sensor, which is convenient to install and use and greatly simplifies the work. Full bridge is widely used in experimental stress analysis and sensor manufacturing.