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Electrochemical sensors

A sensor and electrochemical technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of sensor inadequacy and limitation

Active Publication Date: 2022-02-08
METTLER TOLEDO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of this setup is that the space for the reference electrode and thus the reference electrolyte is limited because the polymer shaft has to be thicker than the previously used glass shaft in order to be robust
Also, depending on the polymer material used, the sensors are less versatile than glass sensors, since polymer materials are more likely to promote the growth of e.g. biological residues and similar residues

Method used

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  • Electrochemical sensors
  • Electrochemical sensors
  • Electrochemical sensors

Examples

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Embodiment Construction

[0030] Figure 1 schematically shows an electrochemical sensor known in the prior art. The electrochemical sensor comprises a longitudinal sensor body 2 , a sensing electrode 10 and a reference electrode 20 .

[0031] The sensing electrode 10 comprises a sensor electrode shaft 11 and a sensitive membrane 12 attached to the distal end of the sensor electrode shaft 11 and disposed in the measurement medium 4 during measurement. Inside the sensor electrode shaft 11, an inner electrolyte 13 and a lead element 14 are arranged.

[0032] Usually, the sensing electrode shaft 11 is made of glass, and the sensitive film 12 can be a glass hemisphere or a glass film. The sensitive membrane 12 senses changes in ion species of ions to be measured in the measurement medium 4 . For applications involving pH measurement, the sensitive membrane 12 is a pH sensitive glass membrane, and for selective ions, the sensitive membrane is an ion selective membrane.

[0033] One end of a lead element 1...

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Abstract

An electrochemical sensor for potential measurement in a measuring medium, said electrochemical sensor comprising a sensor head (201, 301); a longitudinal sensor body (203, 303); arranged on said longitudinal sensor body (203, 303 ) within the sensing electrode (210,310) and reference electrode (220,320); sensor sleeve (230,330) and liquid junction (223,323); wherein, the reference electrode (220,320) set between the sensing electrodes (210, 310) and the sensor sleeve (230, 330); characterized in that the electrochemical sensor further comprises a protective outer shaft (250, 350) and the sensor sleeve A barrel (230, 330) is a polymeric sleeve that is electrically isolated and disposed within the protective outer shaft (250, 350).

Description

technical field [0001] The present invention relates to electrochemical sensors and, more particularly, to improved electrochemical sensors for potentiometric measurements in measurement media. Background technique [0002] Over the years, various electrochemical electrodes and sensors for potentiometry have been developed. A typical example of such an electrochemical sensor is a composite electrode comprising a sensing electrode and a reference electrode enclosed in a glass shaft system. The sensing electrode generally comprises a sensing electrode shaft filled with electrolyte, and a sensitive membrane at the end of the sensing electrode shaft body which is immersible in the measurement medium. A reference electrode generally includes a reference element, a reference electrolyte, and a liquid junction. Liquid junctions are known to establish an electrolytic connection between a reference electrode and a measurement medium. In compound electrodes, the sensing electrode i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
CPCG01N27/26G01N27/36G01N27/4035G01N27/4161C08L27/12C08L71/00C08G65/4012C08G2650/40G01N27/333G01N27/4167
Inventor A·鲁茨D·兹瓦赫伦
Owner METTLER TOLEDO INC