The warning light roller scale uses the drum conveying to save manpower to achieve the purpose of weighing, which is simple and fast to operate. The power drum scale can also be dynamically weighed at high speed, conveying fast and accurately. Weighing can be done unattended. The electronic inline roller weigher is very suitable for checking all kinds of cartons, packaging, etc., flat-bottomed plastic boxes, etc. It can be equipped with a bidirectional RS-232 interface, an external computer, a self-adhesive or striker small printer and a three-color warning light.