Hach Lange Gmbh

Aurelia Stellmach-Hanulok

Michael Kussmann

Axel Leyer

Manfred Battefeld

Andreas Golitz

Markus Hahn

Frank Steinhauer

Andreas Jonak

Lothar Heidemanns

Heinz Rudde

Claudia Rieger

Sebastian Goertz

Silke Brubaker

Daniel Hofsommer

Hartmut Draeger

Michael Küppers

Klaus Bittner

Kathrin Otte

Hartmut Dräger

Nina Aleth

Markus Dr Hahn

A process water analysis sampling assembly includes an immersion probe having a first filter unit and a second filter unit which are fluidically separated from each other, a flushing liquid tank, and a fluidics control. The fluidics control includes a pump arrangement which is fluidically connected to each of the first filter unit and the second filter unit, at least two liquid pumps which are arranged to be mutually independent from each other, and a valve arrangement having plurality of switchable valves. The fluidics control controls a sampling and a flushing of the immersion probe. The fluidic control fluidically connects the flushing liquid tank to one of the first filter unit and the second filter unit and simultaneously connects an analysis unit to the other one of the first filter unit and the second filter unit.

Process water analysis sampling arrangement

The present invention relates to a water sampling immersion probe () for continuously filtering a water sample from wastewater (). The water sampling immersion probe () includes a distal coarse filter () with a porosity of 0.1 to 1.0 mm, a proximal fine filter () arranged downstream of the coarse filter () and having a porosity of less than 5.0 μm, and a sample suction opening () arranged downstream of the fine filter (). The coarse filter () is arranged to not contact the fine filter ().

Water sampling immersion probe

A water analysis sensor electrode for determining an analyte in water includes a sensor electrode housing which is configured to be closed. The sensor electrode housing comprises an inner wall and an ion-selective sensor electrode diaphragm arranged at a lower distal end of the sensor electrode housing. An electrolyte solution is in the sensor electrode housing. A measuring electrode is arranged in the sensor electrode housing. A gas bubble is enclosed by the sensor electrode housing. A rigid rod element having a round cross section is arranged in the sensor electrode housing so that a continuous open capillary channel extends over a length of the sensor electrode housing between the rigid rod element and the inner wall.

Water analysis sensor electrode

A transport container system for a water analysis sensor cartridge includes a water analysis sensor cartridge configured to be interchangeable. The water analysis sensor cartridge comprises at least two different sensor membranes. A transport container cup comprises, for each of the at least two different sensor membranes, a separate moist chamber. Each separate moist chamber comprises one chamber opening and a specific humectant for each of the at least two different sensor membranes.

Water analysis sensor cartridge with transport container

Gas-selective electrodes in liquid analyzing devices have a characteristic curve K with a linear portion L and a non-linear portion NL. In the non-linear portion NL, the characteristic previously could only be estimated so that determinations of the concentration were rather inexact. According to the present application, the electrode is rinsed with an acid and the zero point voltage Uat the electrode is determined during the rinsing. Using the zero point voltage U, the non-linear portion NL of the characteristic K is determined with high precision so that even low concentrations c can be determined with great accuracy.

Method for determining parameters of a gas-selective electrode

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Wuelfrath, Germany

Aurelia Stellmach-Hanulok