Dosing apparatus main solution tank, metering pumps, filters and other components integrated dosing device. Simple, just the drug device combination placed between the dosing, the inlet, the drug is plugged in and power outlet to start into operation, the integration of the entire device, can greatly reduce design and site construction the workload, the quality of the whole system, security and on-site and put into operation to provide a reliable guarantee. Advantages: 1, the product structure of modular design, integrated portfolio, can be easily expanded capabilities and functionality; 2, flexible configuration, according to different requirements of different water quality and users, flexible configuration best practices;