Hach Lange Gmbh

Aurelia Stellmach

Michael Kussmann

Markus Lenhard

Markus Hahn

Andreas Jonak

Heinz Rudde

Sebastian Minke

Michael Kussman

Volker Baar

The invention refers to an optical measurement apparatus () with an optical device () and a liquid sample vessel () for measuring an optical parameter of a liquid sample () in the liquid sample vessel (), comprising a drying circuit circulating drying air for venting the sample vessel (), wherein the drying circuit comprises a mechanical water stop means () in the course of the drying circuit, the water stop means () comprising a conduit body () with a water-absorbing swelling element () arranged within the conduit body (). 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.

Optical measurement apparatus

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Wulfrath, Germany

Aurelia Stellmach