The basis of every scale and weighing system is the load cell. Load cells are used to measure force or weight, respectively. Like most types of force transducers, load cells usually contain a spring body (counterforce), i.e. a shaped piece of (mostly) metal whose geometry changes slightly under the influence of weight. This elastic deformation is detected by strain gauges for weights from a few grams up to several 1000 tons and converted into an electrical signal.