CN204214807U - A kind of pH sensor - Google Patents
A kind of pH sensor Download PDFInfo
- Publication number
- CN204214807U CN204214807U CN201420578995.5U CN201420578995U CN204214807U CN 204214807 U CN204214807 U CN 204214807U CN 201420578995 U CN201420578995 U CN 201420578995U CN 204214807 U CN204214807 U CN 204214807U
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- CN
- China
- Prior art keywords
- buffer solution
- working
- electrode housing
- housing
- working electrode
- 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.)
- Expired - Fee Related
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The open pH sensor of the utility model, contrast electrode housing lower end is provided with fluid infusion hole, fluid infusion is provided with plug in hole, liquid can be filled with in housing, working electrode case inside is provided with working buffer solution and working electrode, working electrode is introduced in working buffer solution by contact conductor, reference buffer solution and contrast electrode is provided with between contrast electrode housing and working electrode housing, contrast electrode is introduced in reference buffer solution by contact conductor, the below of contrast electrode housing is provided with reference salt bridge, the lower end of working electrode is provided with pH value pick-up unit, pH value pick-up unit and working electrode housing are connected as a single entity, pick-up unit outside is provided with protective sleeve, the upper end of working electrode housing and contrast electrode housing is provided with packoff.The utility model structure is simple, easy to use, and owing to being provided with fluid infusion hole, protective sleeve and packoff, whole device can be made more stable, it is more accurate to test.
Description
Technical field
The utility model relates to a kind of sensor, particularly a kind of pH sensor.
Background technology
At present, pH sensor is widely used in the pH value measurement of the liquid such as water, high purity water, chemical solution of the industries such as water treatment, aquaculture, chemical industry, medicine.The definition of so-called pH value is: the negative logarithm of hydrogen ion activity in detected solution, the solution for acid, alkali, salt can represent the potential of hydrogen of solution by unified pH.PH sensor generally comprises makes electrode and working electrode housing, contrast electrode and contrast electrode housing, described working electrode housing is sleeved in described contrast electrode housing, working buffer solution has been charged in described working electrode housing, contrast electrode described in reference buffer solution has been charged in described contrast electrode housing, reference buffer solution and the salt bridge be located on described contrast electrode housing constitute the reference system that pH value is measured, the stability of this reference system determines the detection degree of accuracy of pH value, the sustainable supply ability of this reference buffer solution determines the mission life of pH sensor.Due in testing, reference buffer solution needs to be permeated to detected solution by salt bridge, therefore inevitably causes following problem: one is that chlorine ion concentration in reference solution is progressively changing, and causes the slow drift of measurement result.For the very high measurement occasion of pH accuracy requirement, carry out regular to electrode is needed to verify, so not only bothersome, and be unfavorable for continuous coverage very much; Two is when pressure lower than solution to be measured of the pressure of reference solution, can produce solution to be measured by the inverse osmosis of salt bridge to reference solution, can cause metering misalignment like this, even cause sensor failure; Three is the losses along with reference solution, makes measuring accuracy not reach requirement, and then causes sensor to scrap, and serviceable life is short.
Utility model content
For overcoming the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of pH sensor, strengthens the degree of accuracy of sensor further, improves the life-span of sensor.
In order to achieve the above object, the technical scheme that the utility model is taked is:
A kind of pH sensor, comprises pH value pick-up unit, working electrode, reference salt bridge, fluid infusion hole, contrast electrode, working buffer solution, reference buffer solution, working electrode housing, contrast electrode housing, packoff, contact conductor and protective sleeve.Contrast electrode housing lower end is provided with fluid infusion hole, fluid infusion is provided with plug in hole, liquid can be filled with in housing, working electrode case inside is provided with working buffer solution and working electrode, working electrode is introduced in working buffer solution by contact conductor, reference buffer solution and contrast electrode is provided with between contrast electrode housing and working electrode housing, contrast electrode is introduced in reference buffer solution by contact conductor, the below of contrast electrode housing is provided with reference salt bridge, the lower end of working electrode is provided with pH value pick-up unit, pH value pick-up unit and working electrode housing are connected as a single entity, pick-up unit outside is provided with protective sleeve.The upper end of working electrode housing and contrast electrode housing is provided with packoff, in whole pH value pick-up unit, working buffer solution is set, working buffer solution is set in working electrode housing, the liquid level of working buffer solution is positioned at the 1/2-2/3 of working electrode body height, in contrast electrode housing, arrange reference buffer solution, the liquid level of reference buffer solution is positioned at the top of contrast electrode housing.
In technique scheme, contrast electrode housing is (2-3) with the internal diameter ratio of working electrode housing: 5.
In technique scheme, reference buffer solution is Klorvess Liquid, and reference salt bridge is mainly made up of agar and saturated potassium chloride or saturated ammonium nitrate solution.
Compared with prior art, the utility model structure is simple, easy to use, and owing to being provided with fluid infusion hole, protective sleeve and packoff, whole device can be made more stable, it is more accurate to test.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model pH sensor;
In figure, 1 is pH value pick-up unit, and 2 is working electrode, and 3 is reference salt bridge, and 4 is fluid infusion hole; 5 is contrast electrode, and 6 is working buffer solution, and 7 is reference buffer solution, and 8 is working electrode housing; 9 is contrast electrode housing, and 10 is packoff, and 11 is contact conductor, and 12 is protective sleeve.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1, pH sensor described in the utility model comprises pH value pick-up unit, working electrode, reference salt bridge, fluid infusion hole, contrast electrode, working buffer solution, reference buffer solution, working electrode housing, contrast electrode housing, packoff, contact conductor and protective sleeve.Contrast electrode housing lower end is provided with fluid infusion hole, plug (not marking in figure) is provided with in fluid infusion hole, liquid can be filled with in housing, working electrode case inside is provided with working buffer solution and working electrode, working electrode is introduced in working buffer solution by contact conductor, reference buffer solution and contrast electrode is provided with between contrast electrode housing and working electrode housing, contrast electrode is introduced in reference buffer solution by contact conductor, the below of contrast electrode housing is provided with reference salt bridge, the lower end of working electrode is provided with pH value pick-up unit, pH value pick-up unit and working electrode housing are connected as a single entity, pick-up unit outside is provided with protective sleeve.The upper end of working electrode housing and contrast electrode housing is provided with packoff, in whole pH value pick-up unit, working buffer solution is set, working buffer solution is set in working electrode housing, the liquid level of working buffer solution is positioned at the 1/2-2/3 of working electrode body height, in contrast electrode housing, arrange reference buffer solution, the liquid level of reference buffer solution is positioned at the top of contrast electrode housing.
In technique scheme, contrast electrode housing is (2-3) with the internal diameter ratio of working electrode housing: 5.
In technique scheme, reference buffer solution is Klorvess Liquid, and reference salt bridge is mainly made up of agar and saturated potassium chloride or saturated ammonium nitrate solution.
Above exemplary description is done to the utility model; should be noted that; when not departing from core of the present utility model, any simple distortion, amendment or other those skilled in the art can not spend the equivalent replacement of creative work all to fall into protection domain of the present utility model.
Claims (2)
1. a pH sensor, it is characterized in that: comprise pH value pick-up unit, working electrode, reference salt bridge, fluid infusion hole, contrast electrode, working buffer solution, reference buffer solution, working electrode housing, contrast electrode housing, packoff, contact conductor and protective sleeve, described contrast electrode housing lower end is provided with fluid infusion hole, plug is provided with in described fluid infusion hole, liquid can be filled with in housing, described working electrode case inside is provided with working buffer solution and working electrode, described working electrode is introduced in working buffer solution by contact conductor, reference buffer solution and contrast electrode is provided with between described contrast electrode housing and working electrode housing, described contrast electrode is introduced in reference buffer solution by contact conductor, the below of described contrast electrode housing is provided with reference salt bridge, the lower end of described working electrode is provided with pH value pick-up unit, described pH value pick-up unit and working electrode housing are connected as a single entity, described pick-up unit outside is provided with protective sleeve, the upper end of described working electrode housing and contrast electrode housing is provided with packoff, in whole pH value pick-up unit, working buffer solution is set, in described working electrode housing, working buffer solution is set, the liquid level of described working buffer solution is positioned at the 1/2-2/3 of working electrode body height, in described contrast electrode housing, reference buffer solution is set, the liquid level of described reference buffer solution is positioned at the top of contrast electrode housing.
2. a kind of pH sensor according to claim 1, is characterized in that: described contrast electrode housing is (2-3) with the internal diameter ratio of working electrode housing: 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420578995.5U CN204214807U (en) | 2014-10-08 | 2014-10-08 | A kind of pH sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420578995.5U CN204214807U (en) | 2014-10-08 | 2014-10-08 | A kind of pH sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204214807U true CN204214807U (en) | 2015-03-18 |
Family
ID=52983472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420578995.5U Expired - Fee Related CN204214807U (en) | 2014-10-08 | 2014-10-08 | A kind of pH sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204214807U (en) |
-
2014
- 2014-10-08 CN CN201420578995.5U patent/CN204214807U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20171008 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |