Online line checkweighers otherwise called dynamic checkweighers are use to weigh the product in a automatic production line. These can be for individual product or for a products packed in a cartons were the total carton weight needs to be checked. Any product that needs to weighed to determine the accuracy of the filling machine or packing machine will need to employ a weighing system. Rejection mechanism like air blowing, pusher, or conveyor collapsing can be employed. This can also be used in conjunction with the metal detector asa combo equipment.