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Conductivity sensor

A conductivity sensor and electrode technology, which is applied in the direction of instruments, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as large spaces

Active Publication Date: 2012-07-04
ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The disadvantage in this case is that due to the different cross-sections of the electrodes this electrode structure requires a relatively large space

Method used

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Embodiment Construction

[0017] Like features have the same reference numbers.

[0018] figure 1 Shown is a conductivity sensor 1 comprising an electrically insulating carrier 2 and evaluation electronics 3 connected thereto. The conductivity sensor 1 comprises a circular end face 4 on a cylindrical support 2 , on which an electrode structure of electrodes 5 , 6 , 7 , 8 is arranged. For the measurement, each of the electrodes 5 , 6 , 7 , 8 is connected via a line 9 to the evaluation electronics 3 . Since the support body 2 consists of a non-conductive material, the electrodes 5 , 6 , 7 , 8 are electrically insulated from one another by the support body 2 and the air between them.

[0019] To determine the conductivity of a liquid, the electrode structure is immersed in the liquid. The conductivity of a liquid is a measure of the amount of conductive species, such as impurities, dissolved in the liquid. A prerequisite is that the dissolved species has the ability to form ions. Such conductivity se...

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Abstract

The invention relates to a conductivity sensor, comprising an electrode structure of four concentric electrodes (5, 6, 7, and 8), which are arranged on an end face (4) of a support body (2). The electrodes (5, 6, 7, and 8) are electrically insulated from one another. The electrodes (5, 6, 7, and 8) have an equal, constant area in order to claim a space requirement as small as possible for the electrode structure.

Description

technical field [0001] The invention relates to a conductivity sensor comprising an electrode structure of four concentric electrodes arranged on an end face of a support, wherein the electrodes are electrically insulated from one another. Background technique [0002] A conductivity sensor is known from EP 1089072 A2 with a cylindrical housing, wherein metal measuring electrodes are arranged planarly on the circular end wall of the cylindrical housing. In this case, the metallic measuring electrodes form two voltage electrodes and two current electrodes. The voltage electrode is encompassed and surrounded in a ring by two flat current electrodes, which essentially extend into a semi-ring. A disadvantage of this arrangement is its lack of rotational symmetry, which is very annoying due to, for example, an indeterminate end stop in the case of installation in a screw cap. In conductivity sensors, it is difficult to realize the installation of the electrode structure due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/22G01N27/07
CPCG01N27/06G01R27/02G01R27/26Y10T29/49105
Inventor 马可·弗尔克安德烈亚斯·埃贝尔海姆斯特凡·穆勒
Owner ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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