Hach Lange Gmbh

Frank Steinhauer

Manfred Battefeld

Axel Leyer

Michael Kussmann

Hans-Joachim Kumpch

Andreas Golitz

Andreas Mitreiter

Lothar Heidemanns

Clemens Hanschke

Bas De Heij

Frederik Nordahl

Bernd Gassner

Sebastian Goertz

Michael Kueppers

Aurelia Stellmach-Hanulok

Silke Brubaker

Kathrin Otte

Hartmut Dräger

Markus Lenhard

Rolf Uthemann

Markus Hahn

Andreas Jonak

Heinz Rudde

Sylvia Haustein

Roman Klein

Daniel Hofsommer

Hartmut Draeger

Michael Küppers

Detlef Liebchen

Michael Tschampl

Sebastian Minke

Robert Dalljo

Nina Aleth

Barbara Haase

Elk Fricke

Michael Kuppers

Eik Fricke

Hans Joachim Kumpch

Bernd GAßNER

A flow velocity measurement arrangement () for determining the flow velocity of an electrically conductive liquid in a liquid line, comprising an air bubble injector () for injecting an air bubble into a liquid flow, a first electrical conductivity measurement cell () downstream of the air bubble injector () and upstream of a measurement line (), a second electrical conductivity measurement cell (') downstream of the measurement line (), an evaluation unit () which determines the flow velocity of the liquid in the measurement line () on the basis of the time-related characteristics of the conductivity measurement results of the two measurement cells (′).

Flow velocity measurement arrangement

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

Status indicator panel

Housing for water analyzer

Colorimeter

An optical measurement device with a transparent cylindrical measurement cuvette, which defines an axial symmetrical axis and contains the fluid sample, an optical measurement arrangement which quantitatively determines the optical property of the fluid sample in the measurement cuvette, and a mechanical cleaning arrangement is described. The cleaning arrangement comprises an external magnetic working platform, which is arranged coaxially to the symmetrical axis, is slidable in a translatory manner parallel to the symmetrical axis, is rotatable about the symmetrical axis, encloses the cylindrical measurement cuvette externally in an annular manner, and has at least one translatory magnet element and at least one rotary magnet element, and an internal magnetic cleaning unit, which is arranged within the measurement cuvette and is slidable in a translatory manner, has a cleaning body, has at least one translatory magnet element, and has at least one rotary magnet element. The translatory magnet elements as well as the rotary magnet elements of the working platform and the cleaning unit are coupled to one another in a contactless and magnetic manner, respectively. Other aspects are described and claimed.

Optical measurement device

A nephelometric turbidimeter for measuring a turbidity of a liquid sample in a transparent sample cuvette. The nephelometric turbidimeter includes a cuvette chamber housing with a cuvette chamber having the transparent sample cuvette arranged therein, and a drying apparatus. The drying apparatus includes a cuvette chamber inlet opening which vents the cuvette chamber, a cuvette chamber outlet opening which de-vents the cuvette chamber, an air circulator which circulates air from the cuvette chamber outlet opening to the cuvette chamber inlet opening, and a drying body. The drying body is provided as a container of a hygroscopic agent defined by a drying substance which is arranged in a drying path between the cuvette chamber outlet opening and the cuvette chamber inlet opening so that air flows through the drying body.

Nephelometric turbidimeter and method for controlling the humidity of venting air in a nephelometric turbidimeter

A method for detecting a contamination of a cuvette of a turbidimeter. The turbidimeter includes a light source which emits a light beam directed to a cuvette, a scattering light detector, and a diffuser with a body and an actuator. The actuator moves the body between a parking position and a test position where the body is between the measurement light source and the cuvette, thereby interferes with the light beam, and generates a diffuse test light entering the cuvette. The method includes activating the actuator to move the body from the parking position into the test position, activating the light source, measuring a test light intensity received by the scattering light detector, comparing the test light intensity measured with a reference light intensity, and generating a contamination signal if a difference between a reference light intensity and the test light intensity measured exceeds a first threshold value.

Method for detection of the contamination of a sample cuvette of a nephelometric turbidimeter

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.

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

Laboratory measuring device

Portable turbidimeter

Growing community of inventors

Berlin, Germany

Frank Steinhauer