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Potential sensor equipment

一种电位传感器、传感器设备的技术，应用在仪器、科学仪器、材料电化学变量等方向，能够解决柔性隔离膜破坏等问题，达到减少故障、防止泄漏的效果

Inactive Publication Date: 2016-06-22
ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage in this embodiment is that the flexible barrier membrane may be damaged during transport or storage of the reaction vessel

Method used

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  • Potential sensor equipment
  • Potential sensor equipment
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0081] a) Coating the measuring film

[0082] For the coating of conventional pH-sensitive glass membranes of pH sensor devices, an aqueous solution set at pH=4 with a conventional buffer system (citric acid, hydrochloric acid) and with a PEG content of 50% by weight was produced as immersion solution. The measuring membrane of the sensor device is immersion coated by multiple immersions of the membrane. Each immersion is followed by drying.

[0083] b) First measurement: switch on the sensor device after dry storage

[0084] The sensor device was stored dry for a period of 7 days. Then, it was immersed in deionized water. Thereafter, the sensor device was immersed in the first buffer solution of pH=7 and the second buffer solution of pH=9.18 and the measured values ​​were recorded (results are given in Table 1).

[0085] c) Second measurement: switch on the sensor device after dry storage and disinfection with a dose of 25 kGy

[0086] The sensor device was stored dry fo...

example 2

[0094] For coating conventional pH-sensitive glass membranes of pH sensor devices, an aqueous solution set at pH = 4 with a conventional buffer system (citric acid, HCl) and with a hydroxyethylcellulose (HEC) content of 2 weight percent was Produced as an immersion solution. The measuring membrane of the sensor device is immersion coated by multiple immersions of the membrane. Each immersion was followed by drying.

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Abstract

A potentiometric sensor device comprising: a measuring half-cell with a measuring membrane; a reference half-cell; and a measuring circuit for recording a potential difference between the measuring half-cell and the reference half-cell. wherein the measuring membrane has a coating covering at least a part of the measuring membrane during dry storage of the sensor device, said coating being implemented in at least one immersion region of the sensor device (which region includes the measuring membrane and is to be immersed in the measured medium) Upon immersion in a liquid, especially an aqueous liquid, the coating is at least partially dissolved from the measuring membrane in the event of continuous contact with the liquid.

Description

technical field [0001] The invention relates to a potential sensor device, especially a sensor device for recording measured variables of a liquid measured medium. Such measured variables can be, for example, the pH value of the measured medium or certain chemical substances dissolved in the measured medium—for example the concentration of certain ions. Such sensor devices are used, for example, in laboratory applications, process measurement technology or environmental analysis. Background technique [0002] A potentiometric sensor consists of a measuring half-cell and a reference half-cell. The measuring half-cell comprises a sensor element which, depending on the measured variable, is usually embodied as a measuring membrane, over which a potential is generated. For example, a second type of reference electrode known per se, eg a silver / silver chloride reference electrode, can be used as a reference half-cell, which provides a stable reference potential independent of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
CPCG01N27/36G01N27/4035G01N27/4163
Inventor 安德烈亚斯·罗贝特迈克尔·汉克卡特林·肖尔茨
Owner ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG