VORRICHTUNG UND VERFAHREN ZUR MESSUNG DER LICHTSTREUUNG

The device has a light transmitter (20) with an optical axis (A1). A light detector (40) has another optical axis (A2) detecting light that is dispersed into a measurement volume (30) in a fluid. The optical axes are arranged at an angle with one another. A constraint curve (50) is provided along which the detector is guided in such a manner that the detector is movable into a section (51) of the curve perpendicular to the axis (A1). The axes run parallel to each other in a testing position, and the detector is transferred into another section (52) of the curve in the measuring position. An independent claim is also included for a method for testing a light detector of a device for measuring light scattering at a fluid.