Device for determining the solids portion in sewage water

A device for determining the solids portion in the sewage water (12) of a clarification basin (10) has a sedimentation immersion container (16) for separating the solids phase (70) from the clear phase (74) of the quality of waste water supplied. As a Klarwasserentnahmevorrichtung to the dip tank (16) is provided intended inlet opening (30) through which the sewage water-clarifier (12) to the sedimentation immersion container (16) is supplied. The sedimentation immersion container can be immersed in the sewage water (12) and, in the settling tanks (10) are installed below the Klarwasserspiegels (13). With a solids level measuring device (60) is measured, the solids level (72) in said sedimentation immersion container (16) settled solids phase (70).