This video shows the daruifuno online turbidity sensor OPTU850&851Z. The TU sensor adopts the infrared absorption and scattered light method. The measurement is realiable and stable. There are two models: OPTU850 0.01~1000NTU and OPTU851 0.01~4000NTU. The turbidity sensor can not only measure the turbidity of water, but also measure the suspended solids of water. The measuring range is 0~3000mg/L. The turbidity probe is digital with RS485 interface. If you are interested in the water turbidity probe, feel free to contact us!