Metrological color masterbatch mixer: precise measurement, uniform stirring, no color difference, can automatically mix one main material and 1-3 color masterbatch or additives of plastic raw materials in proportion, suitable for injection molding, extrusion or blow molding production. This series of products adopts a hybrid stepper motor and is equipped with a dedicated PLC touch controller, which can accurately measure the addition ratio of colorants and additives. This mixer can be connected to various molding machine signals for synchronous operation, ensuring consistent performance of the molded products.