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|1. (WO2015043675) NEPHELOMETRIC TURBIDIMETER AND METHOD FOR DETECTION OF THE CONTAMINATION OF A SAMPLE CUVETTE OF A NEPHELOMETRIC TURBIDIMETER|
|Applicants:||HACH LANGE GMBH
DE HEIJ, Bas
|Title:||NEPHELOMETRIC TURBIDIMETER AND METHOD FOR DETECTION OF THE CONTAMINATION OF A SAMPLE CUVETTE OF A NEPHELOMETRIC TURBIDIMETER|
The invention refers to a nephelometric turbidimeter (10) for measuring a turbidity of a liquid sample (49) in a sample cuvette (40). The turbidimeter (10) comprises: a measurement light source (20) for emitting an axial parallel light beam (60) directed to the cuvette (40), a scattering light detector (30) arranged to receive scattered light (66) coming not-axially from the cuvette (40), and a switchable diffuser (50) with an optical diffuser body (52) and a diffuser actuator (54) for moving the diffuser body (52, 52') between a parking position in which the diffuser body (52) does not interfere with the emitted light beam (60) and a test position between the light source (20) and the cuvette (40) in which the diffuser body (52') interferes with the emitted light beam (60) to generate diffuse test light (63) entering the cuvette (40).