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Potentiometric probe for measuring a measurement variable of a medium to be measured contained in a tank

A probe and potential technology, applied in the field of potential probes, can solve the problem that the circuit cannot withstand gamma rays

Inactive Publication Date: 2013-03-13
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

These circuits cannot withstand the gamma rays used to sterilize flexible containers and probes

Method used

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  • Potentiometric probe for measuring a measurement variable of a medium to be measured contained in a tank
  • Potentiometric probe for measuring a measurement variable of a medium to be measured contained in a tank
  • Potentiometric probe for measuring a measurement variable of a medium to be measured contained in a tank

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Embodiment Construction

[0047] figure 1 A potentiometric probe with a housing 1 of insulating material is shown. The housing 1 comprises a first chamber 5 embodied as an annular chamber, in which a reference half-cell is formed and surrounded by an approximately cylindrical second chamber 9, and in which the There are measured half-cells. The insulating material includes in particular synthetic materials such as polyetheretherketone (PEEK). The application of synthetic materials to the housing makes the probes on the one hand almost impervious to breakage. On the other hand, such plastic housings can be produced at an economical cost using established injection molding methods, which is particularly advantageous for the application of the probe as a disposable part. In particular the use of PEEK enables hot steam sterilization in addition to sterilization by gamma radiation.

[0048] The first chamber 5 is surrounded by an outer tubular housing wall 16 and an inner tubular housing wall 17 arrange...

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Abstract

The invention relates to a potentiometric probe for measuring a measurement variable of a medium to be measured contained in a tank, in particular a disposable bioreactor, comprising: a housing (1) comprising a first chamber (5) in which a reference half cell is formed, said cell being connected to a medium surrounding the housing (1) by means of an electrolytic contact point (7) disposed in a wall of the housing (1), wherein the housing (1) comprises a second chamber (9) in which a measurement half cell is formed, wherein the second chamber (9) is closed on one side by a measurement membrane (11), so that a surface of the measurement membrane facing away from the second chamber (9) is in contact with the medium surrounding the housing (1), and wherein the measurement half cell comprises a longitudinal extension between the measurement membrane (11) and a closure element (18); bounding the measurement half cell on a side opposite the measurement membrane (11), characterized in that a quotient of a distance (h) of the measurement membrane (11) from the closure element (18) and an outer diameter (rA) of the housing (1) is less than 5, in particular less than 2.

Description

technical field [0001] The invention relates to a potentiometric probe for measuring a measured variable of a medium in a container, in particular a flexible container, in particular for single-use measuring technology in biotechnological, biochemical, pharmaceutical or biological processes in the application. Background technique [0002] Perform pharmaceutical, chemical, biological, biochemical or biotechnological processes in incremental measurements in single-use containers (also called disposable, or disposable bioreactors). Such disposable containers may for example be flexible containers such as bags, hoses or fermenters, or bioreactors, respectively. Bioreactors or fermenters generally have supply and discharge lines, which can be implemented, for example, as hoses or flexible pipes. Rigid tubulars can also be applied to supply and discharge lines. After terminating the process, the disposable container can be discarded. In this way, complicated cleaning and disi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/403
CPCG01N27/36G01N27/4161G01N27/4035
Inventor 托马斯·威廉蒂洛·特拉普
Owner ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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