The heart of any Weighbridge is the Load Cell. The load cells are highly accurate transducers, designed to sense force or weight under a wide range of adverse conditions. They’re the most essential part of an electronic weighing system, but also the most vulnerable. The sensing or spring element is designed in such a way it develops a strain, directly proportional to the load applied.
The strain gauges, are usually connected in a multiple of four, called a Wheatstone bridge configuration. This converts the very small change in resistance into a usable electrical signal.
Load cells may be damaged because of (shock) overloading, lightning strikes or heavy surges in current, chemical or moisture ingress, mis-handling (dropping, lifting on cable, etc.),vibration, seismic events or internal component malfunctioning. The load cell needs to be properly sealed against the environment.