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1. (WO2015043675) NEPHELOMETRIC TURBIDIMETER AND METHOD FOR DETECTION OF THE CONTAMINATION OF A SAMPLE CUVETTE OF A NEPHELOMETRIC TURBIDIMETER

Pub. No.:    WO/2015/043675    International Application No.:    PCT/EP2013/070353
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Oct 01 01:59:59 CEST 2013
IPC: G01N 21/15
G01N 21/51
Applicants: HACH LANGE GMBH
Inventors: BATTEFELD, Manfred
KUSSMANN, Michael
DE HEIJ, Bas
GAßNER, Bernd
STEINHAUER, Frank
KUMPCH, Hans-Joachim
LEYER, Axel
KÜPPERS, Michael
GOLITZ, Andreas
MITREITER, Andreas
HANSCHKE, Clemens
HEIDEMANNS, Lothar
Title: NEPHELOMETRIC TURBIDIMETER AND METHOD FOR DETECTION OF THE CONTAMINATION OF A SAMPLE CUVETTE OF A NEPHELOMETRIC TURBIDIMETER
Abstract:
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).