Hach Lange Gmbh

Itt Manufacturing Enterprises, Inc.

Hartmut Draeger

Michael Kussmann

Manfred Battefeld

Hans-Joachim Kumpch

Frank Steinhauer

Axel Leyer

Aurelia Stellmach-Hanulok

Daniel Hofsommer

Klaus Lamm

Klaus Wisskirchen

Sebastian Goertz

Detlef Liebchen

Kathrin Otte

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

A water analysis device having a light source and a light detector for detecting an optical parameter of a water sample in a transparent measuring cell is disclosed. A ventilation circuit for ventilating a cell chamber is provided, wherein there is a differential pressure of at least 2.0 mbar between the cell chamber and the atmosphere when a ventilation pump is operated. The device housing forms the cell chamber which is fluidically sealed by a cover assembly. The cover assembly and the device housing have a mechanism that mimics the sealing action of a turn-lock fastener, such that the cover assembly can be secured to and/or released from the device housing by means of a rotational movement. The cover assembly and the device housing form an annular ring seal which is coaxial with the rotational movement and which is formed by an elastic sealing body having a circular sealing lip and a correspondingly circular shoulder seat on which the sealing lip is pressed due to the atmospheric differential pressure. Other aspects are disclosed and claimed.

Water analysis device

An electrical switch (26) is mounted in a rigid housing in the form of a control handle (10), where the housing has a soft flexible covering (32) with a portion (40) that can be depressed to operate the switch. The housing is in the form of a shell with first and second separately molded shell parts (14,16). The first shell part has a hole (24) in it that is aligned with the switch actuator, and the covering is overmolded onto the first shell, with the portion of the covering lying over the hole in the first shell being thickened at the middle (44) of the hole to indicate the area to be depressed and for more comfortable depression. A peripheral area of the first shell has an upstanding wall (62) with passages (66) therein, and the overmolded flexible covering has connection portions (72) that extend from the main covering portion (46) and through the passages to a peripheral covering portion (74), with the peripheral covering portion lying between the first and second shell parts to seal the gap (70) between them.

Actuatable switch in sealed housing

Growing community of inventors

Berlin, Germany

Hartmut Draeger