Refer to relevant standards about turbidity measurement and combined with feature of conventional low turbidity measurements

a 90°scattering turbidity on-line sensor is designed

and measuring principle

optical path design

structure design and measurement and control circuit design are introduced. Refer to relevant standard

experimental verification is conducted measurement repeatability is 0. 25 %

span drift is 1. 2 %

and linearity error is 1. 2 %. Experimental results show that the sensor has good measurement repeatability and high measurement precision

especially suit for turbidity monitoring in the occasions of water environment monitoring and water pollution control.