LISST - 2 5测沙仪是测量悬浮泥沙的粒径与浓度的高精度的检测仪器。将其用于野外现场含沙量测验 ,可省掉取水样和水样处理工作 ,测量迅速 ,并可连续自记 ,提高含沙量测验的工作效率。介绍LISST - 2 5测沙仪的工作原理 ,经室内实验和野外比测试验证实 ,该仪器在一定范围内可用于监测或测试河流水下、水面和分析室水体中泥沙颗粒的含量和浓度的变化情况 LISST - 2 5 Sand Monitor is a high precision measurement instrument for measuring the particle size and concentration of suspended sediment. It can be used in the field to test the sediment concentration in the field, which can dispense with water sampling and water sample processing, measure rapidly, and can continuously self-record and improve the working efficiency of the sediment concentration test. This paper introduces the working principle of LISST - 2 5 sand analyzer. The indoor experiment and outdoor ratio test prove that the instrument can be used to monitor or test the sediment particle concentration and concentration Changes in the situation