Nephelometric turbidimeter and method for detection of the contamination of a sample cuvette of a nephelometric turbidimeter

US9851297B2 · kind B2 · utility

Assignee

• HACH LANGE GMBH · DE

Inventors

• Manfred Battefeld · Goldkronach, DE
• Michael Kussmann · Goldkronach, DE
• Bas De Heij · Dormagen, DE
• Bernd Gassner · Neuss, DE
• Frank Steinhauer · Berlin, DE
• Hans-Joachim Kumpch · Berlin, DE
• Axel Leyer · Rheydt, DE
• Michael Kueppers · Kaarst, DE
• Andreas Golitz · Moers, DE
• Andreas Mitreiter · Berlin, DE
• Clemens Hanschke · Berlin, DE
• Lothar Heidemanns · Korschenbroich, DE

Key dates

• Filing date: Sep 30, 2013
• Grant date: Dec 26, 2017
• Expiry date: Sep 30, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/0634
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A nephelometric turbidimeter for measuring a turbidity of a liquid sample in a sample cuvette. The nephelometric turbidimeter includes a measurement light source configured to emit an axial parallel light beam directed to the sample cuvette, a scattering light detector arranged to receive a scattered light from the sample cuvette, and a diffuser comprising a diffuser body and a diffuser actuator. The diffuser actuator is configured to move the diffuser body between a parking position in which the diffuser body does not interfere with the axial parallel light beam and a test position where the diffuser body is arranged between the measurement light source and the sample cuvette so that the diffuser body interferes with the axial parallel light beam and generates a diffuse test light entering the sample cuvette.