Automatic weighing operation instruments (IPFAs), also known as dynamic weighing controllers, are equipment that, through one or more conveyor belts, weigh the products that circulate through them. They are part of a quality control system and serve to ensure that all products leaving the production line are the right weight and meet packaging requirements. Industrial checkweighers are metrological weighing equipment that determine product mass without operator intervention and that run a standard automatic process program that meets specific metrology directive (MID) requirements.