Checkweighers are weighing systems used to verify that the weight of a product is within prescribed limits. They weigh items that move along a production line, classify items by weight, and then sort or eject items by weight class. Checkweighers consist of a feeder, scale, line divider, discharge unit, and computerized control system. The quality and capabilities of checkweigher components varies by manufacturer, application, model, and cost. Most checkweighers that are designed for food, beverage and pharmaceutical processing applications are washdown capable and able to withstand extremes of temperature and pressure. In some manufacturing environments, checkweighers include an integral printer or provide an interface to a programmable logic controller (PLC) or supervisory control and data acquisition system (SCADA).