Turbidity measurement in the drinking water sector is an important parameter for quality. The legislation in almost every country in the world stipulates a limit value for this turbidity which may not be exceeded. As a sum parameter for all undissolved materials present, turbidity describes a visually detectable feature for the consumer. All the necessary steps involved in drinking water treatment can be monitored and controlled by turbidity measurement.

In the area of wastewater, turbidity and solids measurement are used in a wide variety of applications. From primary sludge removal and sludge dewatering to activated sludge basins and sewage treatment plant outlets, turbidity and solids sensors help monitor and control the processes. In industry too, they also monitor the dirt loads passed into the drain channels.