YCL-3100 Sample Filtration System BOQU Sample Filtration Systems is a pretreatment equipment applied to surface water, sewage and other water sample containing high suspended solid,sludge. After precipitation, mixing and homogenization, the water sample will be transported to COD,Ammonia nitrogen, Total phosphorus, Total nitrogen and other online water quality analyzer according to the procedure after passing through the sampling cup, and the online water quality analyzer can be triggered to start the measurement. The system is equipped with automatic cleaning function. After completing a sampling process, the pipeline, water cup and sedimentation tank can be cleaned by external clean water.