The quantitative controller is mainly used for quantitative filling, quantitative control of adding medicine and water, and quantitative control system of instruments. It is a flow measurement and control system based on ARM microprocessor and matched with various flow transmitters, sensors (such as turbine, vortex, electromagnetic flowmeters) and solenoid valve pump bodies, and can integrate the flow and control the quantitative. The quantitative controller has a good human-machine interface and soft and hard protection measures, simple control operation, reliable safety performance, excellent anti-interference performance, and excellent stability. It is mainly used in occasions where quantitative packaging and control are required in industries such as petroleum, chemical, medicine and food: quantitative punching/adding, loading, batching, discharging, dividing, gasification, etc.