The belt checkweigher for heavy products boxes/bags uses a high-precision digital weighing sensor system to check the weight of the pre-managed products on the production line, and classify the selected weight, underweight, and overweight to prevent unqualified products from entering the market. The industrial online checkweigher is an important equipment in the current production line, usually used at the front end of the sealing machine, scanner, inkjet equipment or at the end of the packaging machine line.