CN2083294U - Multi-point dissolved oxygen electrode having electrolyte - Google Patents
Multi-point dissolved oxygen electrode having electrolyte Download PDFInfo
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- CN2083294U CN2083294U CN 90215500 CN90215500U CN2083294U CN 2083294 U CN2083294 U CN 2083294U CN 90215500 CN90215500 CN 90215500 CN 90215500 U CN90215500 U CN 90215500U CN 2083294 U CN2083294 U CN 2083294U
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- electrode
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- dissolved oxygen
- little shape
- substrate
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Abstract
The utility model discloses a multi-point dissolved oxygen electrode having electrolyte, which comprises an insulating cover board, a base sheet, a working electrode arranged on the base sheet, a verifying electrode, a reference electrode, an auxiliary electrode, a platinum thin-film resistor and electrolyte. The utility model is used for measuring dissolved oxygen, gas partial pressure of oxygen, solution electric conductivity and temperature measurement and the temperature correction for the parameters. The utility model has the advantages of high sensitivity, high response speed, small interference resulting from the flow of measured matters, long service life, etc. The electrode can not be polluted and poisoned easily. The auto-correction can be implemented at any time.
Description
The utility model relates to a kind of test electrode of testing electrochemical variable.
When gas content in mensuration is dissolved in solution and blood sampling, need to measure oxygen content wherein usually, the molten amount of especially measuring in the blood of human body of oxygen is significant for diagnosis and treatment angiocardiopathy.A Thick-Film Multiple Component Cathode Three-Eletrode Oxygen Sensor(IEEE Transactions on Biomedical Engineering, VOL BME-33, No.2, February 1986) reported Chung-Chiun Liu Liu(Changchun) etc. a kind of three electrode lambda sensors of people's design, this lambda sensor contains a substrate of making of insulating material and adopts thick-film technique to make side by side working electrode on substrate, contrast electrode and auxiliary electrode, wherein working electrode is made up of a plurality of microelectrodes that are insulated media isolated, contrast electrode is a rectangle, and auxiliary electrode is interdigitated.Working electrode material is Au, and the contrast electrode material is Ag or Agcl, and auxiliary electrode material is Au, and effective active length of each electrode is about 12mm, and sensor length is about 24mm, and each electrode is welded with extension line.During use, sensor directly inserts dissolved oxygen solution.
Because this three electrode lambda sensors are provided with three electrodes, wherein working electrode is made up of a plurality of microelectrodes, and no oxygen permeation membrane has advantages such as fast, highly sensitive, the difficult generation electric polarization of response speed, and its defective is:
1, sensor itself is not with and is contained electrolytical damping fluid, can only be used to measure dissolved oxygen DO, can not measure gas cyaniding and press;
2, electrode surface directly contacts with detected solution, and vulnerable to pollution poisons, and serviceable life is short;
3, do not establish oxygen permeation membrane, be subject to the interference that measured matter flows and produces, less stable.
The design's purpose is to provide a kind of stable performance, long service life, not only can measures dissolved oxygen DO but also can measures the multiple spot dissolved oxygen electrode that contains electrolytic solution of gas oxygen dividing potential drop.
The drawing explanation:
Fig. 1 is for constituting the insulation cover plate plan view in the multiple spot dissolved oxygen electrode that contains electrolytic solution.
Fig. 2 is the A-A cut-open view of Fig. 1.
Fig. 3 is the B-B cut-open view of Fig. 1.
Fig. 4 is the arrangenent diagram of multiple electrode on the substrate.
The cut-open view at axis place when Fig. 5 is insulation cover plate 1 and substrate 2 applyings.
Fig. 6 is the C-C cut-open view of Fig. 4.
Fig. 7 is the transverse sectional view of dissolved oxygen electrode behind the injection electrolytic solution.
Below in conjunction with description of drawings, describe the design's particular content in detail.
The design's the multiple spot dissolved oxygen electrode that contains electrolytic solution is by insulation cover plate 1, substrate 2, working electrode 3, verification electrode 3 ', contrast electrode 4, auxiliary electrode 5, platinum film resistor 6 and electrolytic solution are formed, wherein substrate 2 is a rectangular parallelepiped, its upper surface has one and is used to arrange contrast electrode 4, the strip groove of auxiliary electrode 5 and storage electrolytic solution, auxiliary electrode 5 and be arranged on the bottom surface of strip groove around the U-shaped contrast electrode 4 of auxiliary electrode 5, working electrode 3 and verification electrode 3 ' be arranged in the both sides of strip groove, platinum film resistor 6 is along the edge placement of substrate 2 upper surfaces; Insulation cover plate 1 is a rectangular parallelepiped, and the both sides of its axis have several symmetrical little shape through hole 11 and electrolyte injecting holes 12.Insulation cover plate 1 shape is shown in Fig. 1～Fig. 3, and various electrode arrangement modes are shown in Fig. 4, Fig. 6 on the substrate 2.
Working electrode 3 is formed by connecting by being positioned at the microelectrode that each little shape through hole 11 of strip groove one side forms, verification electrode 3 ' be formed by connecting by being positioned at the microelectrode that each little shape through hole 11 of strip groove opposite side forms.Electrode and platinum film resistor 6 lead-in wire place epoxy sealings.
Little shape through hole 11 on the insulation cover plate 1, its aperture is 0.01～0.1mm, and the height of little shape through hole 11 and aperture ratio are 1:1.5～1:2.0, and its optimum ratio is 1:1.7, and the spacing between each little shape through hole 11 should be greater than 3 times of aperture.
The working electrode of all oxygen determination sensors, the electric polarization that its characteristic main reasons for decrease is a working electrode and polluted by subparticle to poison.This programme be provided with a characteristic and working electrode 3 identical verification electrode 3 ', utilize the verification electrode 3 ' working electrode 3 that has used is calibrated, working electrode 3 is increased the service life.During measurement, during especially for long term monitoring, the secondary surveying instrument is controlled by microsystem, regularly with verification electrode 3 ' obtain calibration data, working electrode 3 is calibrated, can be reached effect, improve manyfold in serviceable life of electrode thereby make from normal moveout correction; Verification electrode 3 ' also can be used as working electrode 3 to use, life-span this moment doubles.
When being used to measure liquid electric conductivity, in the cavity with the fluid to be measured injecting electrode, secondary surveying instrument electronic switch switches to electric waveguide measuring circuit, working electrode 3 and verification electrode 3 ' on apply constant current, according to electrode 3,3 ' last magnitude of voltage that produces, can obtain the conductivity of fluid to be measured.
Temperature correction when measured temperature can be used for dissolved oxygen and conductivity measurement.
This electrode is applicable to the measurement of dissolved oxygen DO in the industry aqueous solution such as aquaculture, oceanographic engineering, environmental protection, chemical industry, pharmacy, measurement of oxygen content in the extracorporeal blood, liquid electric conductivity measurement etc.
Embodiment 1:
A kind of multiple spot dissolved oxygen electrode that contains electrolytic solution, adopt Fig. 1～structure shown in Figure 7, substrate 2 is of a size of 18.0 * 6.0 * 0.4mm, strip groove on the substrate 2 is of a size of 13.5 * 2.5 * 0.15mm, and insulation cover plate 1 is of a size of 15.0 * 6.0 * 0.2mm, and little shape through hole 11 diameters are 0.1mm, working electrode 3 and verification electrode 3 ' all be formed by connecting by 25 microelectrodes, auxiliary electrode 5 is long * wide be 13.5 * 0.1mm, contrast electrode 4 width are 0.1mm, become U-shaped; Platinum film resistor 6 is arranged in the edge of substrate 2 upper surfaces.
Adopt sputtering technology to make with top electrode and resistance, insulation cover plate 1 material is a silicon chip, little shape through hole 11 on it and the processing of electrolyte injecting hole 12 usefulness etch, and substrate 2 usefulness glass are made, use the high-pressure electrostatic bonding between insulation cover plate 1 and the substrate 2, extension line place epoxy sealing.
When this electrode was used to measure dissolved oxygen DO, response sensitivity can reach 1 μ A/PPmo
2
Embodiment 2:
A kind of multiple spot dissolved oxygen electrode that contains electrolytic solution with surveying body inner blood oxygen content, is of a size of 2.0 * 1.0 * 0.4mm, working electrode 3 and verification electrode 3 ' respectively to form by 8 microelectrodes, and little shape through hole 11 apertures are 0.04mm.This sensor inserts in the body with cardiac catheter during measurement.
With prior art relatively, the present invention has the following advantages:
1, utilize the electrolyte of self to contact with fluid to be measured or gas, can measure dissolved oxygen, again can the measurement gas partial pressure of oxygen.
2, because being provided with little shape through hole 11, electrode does not directly contact fluid to be measured or gas, and electrode is difficult for contaminated poisoning, and the interference that flowed by measured matter is little.
3, be provided with the identical working electrode of characteristic 3 and verification electrode 3 ', can be used for measuring the electrical conductivity of liquid.
4, can utilize seldom the verification electrode 3 that uses ' termly working electrode 3 is carried out verification, prolong manyfold service life.
5, be provided with platinum film resistor 6, temperature is proofreaied and correct, to improve certainty of measurement.
Claims (3)
1, a kind of multiple spot dissolved oxygen electrode that contains electrolytic solution comprises substrate, the working electrode that a plurality of microelectrodes constitute, and contrast electrode, auxiliary electrode is characterized in that:
-this multiple spot dissolved oxygen electrode by insulation cover plate 1, substrate 2, working electrode 3, verification electrode 3 ', contrast electrode 4, auxiliary electrode 5, platinum film resistor 6 and electrolytic solution forms, wherein substrate 2 is a rectangular parallelepiped, its upper surface has a strip groove that is used to arrange contrast electrode 4, auxiliary electrode 5 and stores electrolytic solution, auxiliary electrode 5 and be arranged on the bottom surface of strip groove around the U-shaped contrast electrode 4 of auxiliary electrode 5, working electrode 3 and verification electrode 3 ' be arranged in the both sides of strip groove, platinum film resistor 6 is along the edge placement of substrate 2 upper surfaces; Insulation cover plate 1 is a rectangular parallelepiped, and the both sides of its axis have several symmetrical little shape through hole 11 and electrolyte injecting holes 12;
-insulation cover plate 1 and be provided with multielectrode substrate 2 and fit, the electrolytic solution that injects from electrolyte injecting hole 12 is full of all little shape through holes 11, sealing electrolyte injecting hole 12;
-working electrode 3 is formed by connecting by being positioned at the microelectrode that each little shape through hole 11 of strip groove one side forms, verification electrode 3 ' be formed by connecting by being positioned at the microelectrode that the little shape through hole 11 of strip groove opposite side forms;
The extension line place epoxy sealing of-electrode and platinum film resistor 6.
2, multiple spot dissolved oxygen electrode according to claim 1, it is characterized in that: little shape through hole 11 apertures on the insulation cover plate 1 are 0.01mm～0.1mm, the height of little shape through hole 11 and aperture ratio are 1:1.5～1:2.0, and the spacing between each little shape through hole 11 should be greater than 3 times of aperture.
3, multiple spot dissolved oxygen electrode according to claim 1 and 2 is characterized in that: the height of little shape through hole 11 and the optimum ratio in aperture are 1:1.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90215500 CN2083294U (en) | 1990-11-23 | 1990-11-23 | Multi-point dissolved oxygen electrode having electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90215500 CN2083294U (en) | 1990-11-23 | 1990-11-23 | Multi-point dissolved oxygen electrode having electrolyte |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2083294U true CN2083294U (en) | 1991-08-21 |
Family
ID=4894782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90215500 Withdrawn CN2083294U (en) | 1990-11-23 | 1990-11-23 | Multi-point dissolved oxygen electrode having electrolyte |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2083294U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533031B (en) * | 2009-04-15 | 2012-05-23 | 中国农业大学 | Dissolved oxygen intelligent transducer |
| CN104330456A (en) * | 2014-11-05 | 2015-02-04 | 中国科学院南京地理与湖泊研究所 | Device and method for synchronously monitoring concentration of dissolved oxygen (DO) of water at different depth in real time |
| CN104990970A (en) * | 2015-06-24 | 2015-10-21 | 中山欧麦克仪器设备有限公司 | Dissolved oxygen sensor with automatic temperature compensating |
-
1990
- 1990-11-23 CN CN 90215500 patent/CN2083294U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533031B (en) * | 2009-04-15 | 2012-05-23 | 中国农业大学 | Dissolved oxygen intelligent transducer |
| CN104330456A (en) * | 2014-11-05 | 2015-02-04 | 中国科学院南京地理与湖泊研究所 | Device and method for synchronously monitoring concentration of dissolved oxygen (DO) of water at different depth in real time |
| CN104330456B (en) * | 2014-11-05 | 2017-02-15 | 中国科学院南京地理与湖泊研究所 | Device and method for synchronously monitoring concentration of dissolved oxygen (DO) of water at different depth in real time |
| CN104990970A (en) * | 2015-06-24 | 2015-10-21 | 中山欧麦克仪器设备有限公司 | Dissolved oxygen sensor with automatic temperature compensating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |