In the Beijing Asuwei domestic waste comprehensive treatment project, a total of 8 pools are equipped with Sinomeasure dissolved oxygen meters. The dissolved oxygen meters are mainly used to treat waste leachate and sewage. After installation, the accuracy and stability of the meters have reached The acceptance criteria for this project. In addition, the project also requires that the on-site pipeline flow can be accurately measured and uploaded in real time. Through on-site field verification, the parameters measured by the multiple ultrasonic flowmeters of Sinomeasure are consistent with the standard table on site. In the end, the entire project was trusted and highly recognized by Party A.