DE1623064B2 - Measuring cell for determining gas concentrations in liquids, especially oxygen in water - Google Patents
Measuring cell for determining gas concentrations in liquids, especially oxygen in waterInfo
- Publication number
- DE1623064B2 DE1623064B2 DE19661623064 DE1623064A DE1623064B2 DE 1623064 B2 DE1623064 B2 DE 1623064B2 DE 19661623064 DE19661623064 DE 19661623064 DE 1623064 A DE1623064 A DE 1623064A DE 1623064 B2 DE1623064 B2 DE 1623064B2
- Authority
- DE
- Germany
- Prior art keywords
- measuring
- electrode
- electrolyte
- cell
- membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Description
dient. Die Zelle ist an dem in die Flüssigkeit eintauchenden Ende mit einer Membran 5 abgeschlossen, die mittels eines Gummiklemmringes 12 am Zellenkörper 1 befestigt ist. Mit Hilfe eines Elektrolyten 10 ist eine leitende Verbindung zwischen der Meßelektrode 2 und der Bezugselektrode 3 hergestellt. Durch ein elektrisch isolierendes und chemisch neutrales Gittergewebe 6 aus Kunststoff mit großem Porenvolumen 10 α zwischen der Meßelektrode 2 und der Membran 5 wird der Raum für den Elektrolyten 10 an der Entscheidenden Engpaßstelle wesentlich vergrößert. serves. The cell is closed at the end immersed in the liquid with a membrane 5, which is fastened to the cell body 1 by means of a rubber clamping ring 12. With the help of an electrolyte 10 a conductive connection between the measuring electrode 2 and the reference electrode 3 is established. By an electrically insulating and chemically neutral mesh fabric 6 made of plastic with a large pore volume 10 α between the measuring electrode 2 and the membrane 5 is the space for the electrolyte 10 significantly enlarged at the crucial bottleneck.
Gut bewährt hat sich ein Gittergewebe 6 aus einem chemisch resistenten Kunststoff, z. B. aus Polyamid, das in einer oder mehreren Lagen zwischen der MeßA mesh fabric 6 made of a chemically resistant plastic, for. B. made of polyamide, that in one or more positions between the measuring
elektrode 2 und der Membran 5 eingelegt wird. Dieses Gittergewebe 6 dient gleichzeitig als Stütze für die Membran 5. Hierdurch werden bei Aufrechterhaltung einer hohem mechanischen und elektrischen Stabilität Abstandswerte zwischen der Elektrode 2 und der Membran bis zu einigen Zehntel-Millimeter erzielt.electrode 2 and the membrane 5 is inserted. This mesh fabric 6 also serves as a support for the Diaphragm 5. This will help maintain a high level of mechanical and electrical Stability Distance values between the electrode 2 and the membrane up to a few tenths of a millimeter achieved.
Ein eingebauter temperaturabhängiger Widerstand 4, z.B. ein Thermistor, dient zur Kompensation der Temperaturabhängigkeit des Zellenstromes.A built-in temperature-dependent resistor 4, e.g. a thermistor, is used for compensation the temperature dependence of the cell current.
Die Verbindungsleitungen zu den Elektroden 2 und 3 bzw. zum Thermistor 4 sind mit 7, 8 und 9 bezeichnet. Zur Fixierung der Elektroden und des Thermistors im Zellenkörper 1 wird ein Kitt 11 verwendet. The connection lines to the electrodes 2 and 3 and to the thermistor 4 are designated 7, 8 and 9 . A cement 11 is used to fix the electrodes and the thermistor in the cell body 1.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (3)
der Elektrolytschicht und einer die Meßelektrode vor Diese Aufgabe wird bei einer Meßzelle der ein-The invention relates to a measuring cell for determining undesired diffused constituents of gas concentrations in liquids, in particular and whose reaction products are avoided, especially of oxygen in water, consisting of and thereby connecting the measuring cell with improved stability of a measuring and reference electrode - and has a longer service life,
the electrolyte layer and one the measuring electrode in front of this task.
Bezugelektrode eine durchgehende elektrisch leitende An Hand der Zeichnung wird ein Ausführungsbei-So that the current required for the measurement is to be arranged one above the other. A suitable material circle is closed, must be between the measuring and for the mesh fabric is polyamide.
Reference electrode a continuous electrically conductive one.
zwischen der Meßelektrode und der Membran ist. Bei der im Schnitt schematisch dargestellten Meß-Connection exist, the narrowest point of which the space 65 explains the invention in more detail,
is between the measuring electrode and the membrane. In the measurement shown schematically in section
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES0107466 | 1966-12-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1623064A1 DE1623064A1 (en) | 1971-02-18 |
DE1623064B2 true DE1623064B2 (en) | 1974-09-05 |
Family
ID=7528128
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19661623064 Pending DE1623064B2 (en) | 1966-12-17 | 1966-12-17 | Measuring cell for determining gas concentrations in liquids, especially oxygen in water |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1623064B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0247941A2 (en) * | 1986-05-26 | 1987-12-02 | TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION | Gas sensor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK133280A (en) * | 1980-03-27 | 1981-09-28 | Radiometer As | Electrode arrangement |
-
1966
- 1966-12-17 DE DE19661623064 patent/DE1623064B2/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0247941A2 (en) * | 1986-05-26 | 1987-12-02 | TERUMO KABUSHIKI KAISHA trading as TERUMO CORPORATION | Gas sensor |
EP0247941A3 (en) * | 1986-05-26 | 1989-02-22 | Terumo Kabushiki Kaisha Trading As Terumo Corporation | Gas sensor |
Also Published As
Publication number | Publication date |
---|---|
DE1623064A1 (en) | 1971-02-18 |
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