Truck scales are huge scales used to weigh truck loads to make sure that the trucks are not over or under the particular load amount. These scales can be found at many quarry and collective operations. These scales help to maximize the amount of load for each truck while maintaining an amount that is lower than the legal limit. It takes the pressure (mechanical force) applied on load cells and turn that energy into an electrical signal.

These scales consists of a scale frame that supports the weight of a semi truck without main flexing or bowing, load cells, junction boxes and an indicator.The sketch below is of a pitless electronic scale insides. This scale is normally set in three sections. When the truck rolls on the scale, the pressure from the wheels is noticed by the sensors in the load cells. These load cells then 'translate' the amount of pressure (or mechanical force) into an electronic signal. The signals from all of the load cells are then sent out to junction boxes. Junction box sums all the signals into single signal so that it can be read by an indicator. The indicator will tell humans how much the truck weighs.