A Check weigher is a system that weighs items as they pass through the unit, classifies the items by preset weight zones, and ejects or sorts the items based on their classification. Check weighers weigh 100% of the items on a production line. Typically, an in feed section, scale section, discharge section, rejecter and computerized control comprise the physical check weighing system. https://www.twspl.com/check-weigher.php