CN2254552Y - Dissolved-oxygen sensor - Google Patents
Dissolved-oxygen sensor Download PDFInfo
- Publication number
- CN2254552Y CN2254552Y CN 95244806 CN95244806U CN2254552Y CN 2254552 Y CN2254552 Y CN 2254552Y CN 95244806 CN95244806 CN 95244806 CN 95244806 U CN95244806 U CN 95244806U CN 2254552 Y CN2254552 Y CN 2254552Y
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- CN
- China
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- electrode body
- electrode
- fixed
- oxygen sensor
- dissolved oxygen
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Abstract
The utility model relates to a dissolved oxygen sensor. The utility model is characterized in that an electrolyte cavity (5) is arranged on an electrode body (4), and electrolyte is filled in the electrolyte cavity (5); a reference electrode (1) is fixed on an upper part in the electrolyte cavity (5), and an anode (2) is fixed on a lower part in the electrolyte cavity (5); a cathode (3) is fixed on the lower bottom part of the electrode body (4); the lower bottom surface of the sensor, which is formed by the lower part of the cathode (3), the lower opening part of the electrolyte cavity (5), and the lower bottom of the electrode body (4), is coated with an oxygen penetrating film (6). The utility model which can detect the loss situation of the electrolyte has the advantages of improved measuring precision and extended service life.
Description
The utility model relates to a kind of sensor.
Traditional dissolved oxygen sensor is based on the electrochemical sensor that polarography is measured oxygen in water, it is made up of anode (Ag/AgCl), negative electrode (Au or Pt), electrolytic solution and oxygen permeation membrane, after adding 0.7 volt of polarizing voltage on the anode, oxygen in water reacts on negative electrode by oxygen permeation membrane, the electrode output current is directly proportional with water oxygen, thereby measures the oxygen in water amount.Because dissolved oxygen DO carries out electrochemical reaction on electrode, usually make that the current potential on the anode changes, thereby influenced the measuring accuracy of sensor.
The purpose of this utility model is to provide a kind of dissolved oxygen sensor that can improve measuring accuracy.
The technical solution of the utility model is: electrode body is provided with electrolyte cavities, be filled with electrolytic solution in this electrolyte cavities, top in the described electrolyte cavities is fixed with contrast electrode, the bottom is fixed with anode, the lower bottom part of electrode body is fixed with negative electrode, and the infraoral of described negative electrode bottom, electrolyte cavities and the formed sensor bottom surface of the lower bottom part of electrode body are coated with oxygen permeation membrane.
The utility model compared with prior art has following advantage:
(1). owing to do not have electric current to flow through in the contrast electrode,, reappearance, long-time stability, the linearity of sensor are improved a lot, improved the measuring accuracy of sensor so guaranteed the stability of contrast electrode current potential.
(2). the loss situation of electrolytic solution can be detected by the potential difference (PD) that detects between contrast electrode and the anode, thereby the self check of sensor can be carried out.
(3). during oxygen electrode work, dissolved oxygen DO in the water constantly consumes at cathode surface, make that oxygen concentration has a concentration difference in cathode surface and the water body, for the accuracy that guarantees to measure, require water body that bigger flow velocity is arranged, and three-electrode structure is because anode and negative electrode position are very approaching, can be added in time on the negative electrode by the oxygen of cathode consumption in regeneration on the anode, so the utility model requires to reduce to the tested water body flow velocity, has made things convenient for the instrument use, has also improved accuracy.
The utility model will be further described below in conjunction with drawings and Examples:
Accompanying drawing 1 is a structure cut-open view of the present utility model;
Accompanying drawing 2 is the A-A direction cut-open view of accompanying drawing 1; Wherein:
[1]. contrast electrode; [2]. anode; [3]. negative electrode; [4]. electrode body; [5]. electrolyte cavities; [6]. oxygen permeation membrane;
Embodiment: referring to accompanying drawing 1, electrode body [4] is provided with electrolyte cavities [5], be filled with the potassium chloride electrolytic solution of 0.1MOL/L in this electrolyte cavities [5], top in the described electrolyte cavities [5] is fixed with contrast electrode [1], the bottom is fixed with anode [2], the lower bottom part of electrode body [4] is fixed with negative electrode [3], described negative electrode [3] bottom, the formed sensor bottom surface of the lower bottom part of the infraoral of electrolyte cavities [5] and electrode body [4] is coated with oxygen permeation membrane [6], make dissolved oxygen DO can enter in the electrolyte cavities [5] and enter the surface of negative electrode [3], but electrolytic solution can be in electrolyte cavities [5] flow out and not enter the sample water.Contrast electrode of the present utility model [1] detects cathode potential, and by negative-feedback circuit, the control anode voltage makes that potential difference (PD) is held constant at 0.7 volt between anode and the negative electrode.Described electrode body [4] is " mountain " font of the handstand shown in the accompanying drawing 1, described contrast electrode [1] is fixed in the cylinder top in the middle of the electrode body [4], anode [2] is fixed in the bottom of the middle cylinder of electrode body [4], and negative electrode [3] is fixed in the bottom of the middle cylinder of electrode body [4].Referring to accompanying drawing 2, described electrolyte cavities [5] forms circular around the cylinder in the middle of the described electrode body [4], described contrast electrode [1] is circular and is embedded on the middle cylinder of electrode body [4], and described anode [2] is circular and is embedded on the middle cylinder of electrode body [4].Described negative electrode [3] is the cylindric bottom center place that is embedded in the middle cylinder of electrode body [4] mutually.Described anode [2] extends downward the bottom of the middle cylinder of electrode body [4], makes that negative electrode [3] and anode [2] are nearer at interval.Each electrode all is connected with electrode cable and causes the electrode body outside.
Claims (7)
1. dissolved oxygen sensor, it is characterized in that: electrode body [4] is provided with electrolyte cavities [5], this electrolyte cavities is filled with electrolytic solution in [5], top in the described electrolyte cavities [5] is fixed with contrast electrode [1], the bottom is fixed with anode [2], the lower bottom part of electrode body [4] is fixed with negative electrode [3], and the formed sensor bottom surface of lower bottom part of the infraoral of described negative electrode [3] bottom, electrolyte cavities [5] and electrode body [4] is coated with oxygen permeation membrane [6].
2. dissolved oxygen sensor according to claim 1, it is characterized in that: the section of described electrode body [4] is " mountain " font of handstand, described contrast electrode [1] is fixed in the cylinder top in the middle of the electrode body [4], anode [2] is fixed in the bottom of the middle cylinder of electrode body [4], and negative electrode [3] is fixed in the bottom of the middle cylinder of electrode body [4].
3. dissolved oxygen sensor according to claim 1 is characterized in that: described electrolyte cavities [5] forms circular around the cylinder in the middle of the described electrode body [4].
4. dissolved oxygen sensor according to claim 2 is characterized in that: described contrast electrode [1] is circular and is embedded on the middle cylinder of electrode body [4].
5. dissolved oxygen sensor according to claim 2 is characterized in that: described anode [2] is circular and is embedded on the middle cylinder of electrode body [4].
6. dissolved oxygen sensor according to claim 2 is characterized in that: described negative electrode [3] is the cylindric bottom center place that is embedded in the middle cylinder of electrode body [4] mutually.
7. dissolved oxygen sensor according to claim 2 is characterized in that: described anode [2] extends downward the bottom of the middle cylinder of electrode body [4].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244806 CN2254552Y (en) | 1995-09-28 | 1995-09-28 | Dissolved-oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244806 CN2254552Y (en) | 1995-09-28 | 1995-09-28 | Dissolved-oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2254552Y true CN2254552Y (en) | 1997-05-21 |
Family
ID=33885128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95244806 Expired - Fee Related CN2254552Y (en) | 1995-09-28 | 1995-09-28 | Dissolved-oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2254552Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498681B (en) * | 2009-03-13 | 2012-05-09 | 吴守清 | Electrode for measuring trace dissolved oxygen |
| CN103353474A (en) * | 2013-04-28 | 2013-10-16 | 苏州天和自动化系统有限公司 | Dissolved oxygen sensor |
| CN104094106A (en) * | 2011-09-14 | 2014-10-08 | 生命安全销售股份公司 | Lead-free electrochemical galvanic oxygen sensor |
| CN104614418A (en) * | 2013-04-28 | 2015-05-13 | 天和自动化科技（苏州）股份有限公司 | Enclosed dissolved oxygen sensor |
| CN104614419A (en) * | 2013-04-28 | 2015-05-13 | 天和自动化科技（苏州）股份有限公司 | High precision dissolved oxygen detector |
| CN104698049A (en) * | 2013-04-28 | 2015-06-10 | 天和自动化科技（苏州）股份有限公司 | Environment-friendly dissolve oxygen (DO) sensor |
| CN104698045A (en) * | 2013-04-28 | 2015-06-10 | 天和自动化科技（苏州）股份有限公司 | Dissolved oxygen (DO) electrochemical sensor |
-
1995
- 1995-09-28 CN CN 95244806 patent/CN2254552Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498681B (en) * | 2009-03-13 | 2012-05-09 | 吴守清 | Electrode for measuring trace dissolved oxygen |
| CN104094106A (en) * | 2011-09-14 | 2014-10-08 | 生命安全销售股份公司 | Lead-free electrochemical galvanic oxygen sensor |
| CN104094106B (en) * | 2011-09-14 | 2016-11-09 | 生命安全销售股份公司 | Unleaded electrochemical primary cells type lambda sensor |
| US9557289B2 (en) | 2011-09-14 | 2017-01-31 | Life Safety Distribution Ag | Lead-free electrochemical galvanic oxygen sensor |
| CN103353474A (en) * | 2013-04-28 | 2013-10-16 | 苏州天和自动化系统有限公司 | Dissolved oxygen sensor |
| CN103353474B (en) * | 2013-04-28 | 2015-03-04 | 苏州天和自动化系统有限公司 | Dissolved oxygen sensor |
| CN104614418A (en) * | 2013-04-28 | 2015-05-13 | 天和自动化科技（苏州）股份有限公司 | Enclosed dissolved oxygen sensor |
| CN104614419A (en) * | 2013-04-28 | 2015-05-13 | 天和自动化科技（苏州）股份有限公司 | High precision dissolved oxygen detector |
| CN104698049A (en) * | 2013-04-28 | 2015-06-10 | 天和自动化科技（苏州）股份有限公司 | Environment-friendly dissolve oxygen (DO) sensor |
| CN104698045A (en) * | 2013-04-28 | 2015-06-10 | 天和自动化科技（苏州）股份有限公司 | Dissolved oxygen (DO) electrochemical sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |