The selection of the most suitable instrument for measuring the flow of sewage is especially important due to the urgent work of sewage treatment and complex measurement environment of sewage systems. To this end, the current work reviews a number of sewage flow measuring instruments divided into four categories of differential pressure flowmeters, open channel flowmeters, electromagnetic flowmeters, and ultrasonic flowmeters and introduces a new retractable portable multifunctional flowmeter. The common flow measuring instruments are also introduced since they are the basis of sewage flow measurement. Moreover, we extensively compare the advantages and disadvantages of these instruments, analyze their ranges of application, and discuss their prospects. Compared with the traditional flow measuring instruments, the new retractable portable multifunctional flowmeter can measure the flow area of sewage pipes, the degree of siltation, and the average water flow in the drain pipes with silt deposits more accurately. In the future, the improvement in accuracy is still the research focus, and sewage flow measuring instruments will have a broader market prospect and development space with the rapid development in the electronic information technology.

由于污水处理工作紧迫，污水系统测量环境复杂，因此选择最适合测量污水流量的仪表就显得尤为重要。为此，目前的工作回顾了一些污水流量测量仪表，分为差压流量计、明渠流量计、电磁流量计和超声波流量计四大类，并推出了一种新型的可伸缩便携式多功能流量计。还介绍了常用的流量测量仪表，因为它们是污水流量测量的基础。此外，我们广泛比较了这些仪器的优缺点，分析了它们的应用范围，并讨论了它们的前景。与传统的流量测量仪表相比，新型可伸缩便携式多功能流量计可以更准确地测量污水管道的流通面积、淤积程度以及有淤泥沉积的排水管道中的平均水流量。未来精度的提高仍是研究重点，随着电子信息技术的飞速发展，污水流量测量仪表将拥有更广阔的市场前景和发展空间。