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reference electrode

A technology of reference electrode and measurement electrode, applied in the field of reference electrode, can solve the problems of being prone to defects, expensive, and the reference electrolyte contaminating the measurement medium, etc., and achieve the effects of low conductivity, prolonging service life, and reducing electrolyte outflow

Inactive Publication Date: 2011-11-30
ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] However, this embodiment has the disadvantage that the reference electrolyte would contaminate the measurement medium more strongly due to the outflow of the reference electrolyte into the measurement medium
However, these are more complex solutions and therefore prone to flaws and expensive

Method used

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Embodiment Construction

[0065] figure 1 Schematically shows a longitudinal section through a reference electrode 1 having a tubular housing part 10 with a closure cap 12 at one end and a partition wall 9 connected to the tubular part 10 at the other end to form the housing 3. The tubular housing part 10 , the closure lid 12 and the partition wall 9 delimit a housing interior which is filled, for example in the region adjacent to the partition wall 9 , with a reference electrolyte 5 in the form of a 3 molar potassium chloride aqueous solution. A silver wire coated with silver chloride acts as a sensor 7 extending into the reference electrolyte 5 . The sensor 7 is guided through the closure cover 12 and is connected to measuring electronics (not shown) via connecting wires 8 . For example, the connecting lead 8 can be led to a high-impedance input of a measuring amplifier or an impedance converter, which outputs the electrode potential as a voltage signal and forwards the amplified or converted volta...

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Abstract

The present invention relates to reference electrode, in particular for a potentiometric measuring cell, comprising: a housing which surrounds a housing internal space which contains a reference electrolyte and at least one part of a deriving system for deriving a potential of the reference electrode, wherein the reference electrolyte is in contact with a medium, in particular a measurement medium, which surrounds the housing, via at least one hole which passes through a wall of the housing, wherein the hole has an internal diameter of no more than 50 [mu]m and a longitudinal extent of no more than 200 [mu]m at the narrowest point thereof.

Description

technical field [0001] The present invention relates to a reference electrode, in particular a reference electrode for a potentiometric measuring element, and comprises a housing surrounding an inner space of the housing containing a reference electrolyte and at least a portion of a potential transducer for sensing the potential of the reference electrode. sense system. Background technique [0002] Reference electrodes are used to provide a constant reference potential for measurements given in a potentiometric measuring cell with one or more measuring electrodes. They are frequently used in many applications as rod-shaped reference electrodes, or combined with measuring electrodes to form measuring chains known as single rods. Measuring electrodes - with which reference electrodes are applied - include, for example, pH electrodes or ion-selective electrodes for the determination of cations such as sodium, potassium, calcium or cations such as chloride, fluoride, nitrate a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/401G01N27/403
CPCG01N27/403G01N27/30G01N27/401G01N27/301G01N27/333
Inventor 斯特凡·维尔克
Owner ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG