Optical measurement apparatus

US11209347B2 · kind B2 · utility

Assignee

• HACH LANGE GMBH · DE

Inventors

• Michael Kussman · Düsseldorf, DE
• Aurelia Stellmach · Wülfrath, DE
• Markus Hahn · Kempen, DE
• Markus Lenhard · Viersen, DE
• Sebastian Minke · Krefeld, DE
• Andreas Jonak · Meerbusch, DE
• Volker Baar · Kaarst, DE
• Heinz Rudde · Hückelhoven, DE

Key dates

• Filing date: Jul 20, 2016
• Grant date: Dec 28, 2021
• Expiry date: Dec 25, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/158
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention refers to an optical measurement apparatus (10) with an optical device (18,20,22) and a liquid sample vessel (12) for measuring an optical parameter of a liquid sample (13) in the liquid sample vessel (12), comprising a drying circuit circulating drying air for venting the sample vessel (12), wherein the drying circuit comprises a mechanical water stop means (100) in the course of the drying circuit, the water stop means (100) comprising a conduit body (102) with a water-absorbing swelling element (120) arranged within the conduit body (102). The water stop means is simple and inexpensive and reliably protects all elements downstream of the water stop means from a water ingress upstream of the water stop means.