CN105486730A - Agricultural acid-base value detection apparatus - Google Patents
Agricultural acid-base value detection apparatus Download PDFInfo
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- CN105486730A CN105486730A CN201410525653.1A CN201410525653A CN105486730A CN 105486730 A CN105486730 A CN 105486730A CN 201410525653 A CN201410525653 A CN 201410525653A CN 105486730 A CN105486730 A CN 105486730A
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- buffer solution
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Abstract
The invention relates to agricultural acid-base value detection apparatus. A liquid supplementing hole is formed in the lower end of a reference electrode shell; a rubber plug is arranged in the liquid supplementing hole, so that the shell can be filled with liquid; a work buffering solution and a working electrode are arranged on the inner side of a working electrode shell; the working electrode is introduced into the work buffering solution through an electrode lead wire; a reference buffering solution and a reference electrode are arranged between the reference electrode shell and the working electrode shell; the reference electrode is introduced into the reference buffering solution through an electrode lead wire; a reference salt bridge is arranged below the reference electrode shell; a pH value detection device is arranged at the lower end of the working electrode and is integrally connected with the working electrode shell; a protection sleeve is arranged outside the detection device; sealing devices are arranged at the upper ends of the working electrode shell and the reference electrode shell. The agricultural acid-base value detection apparatus is simple in structure and convenient to use; by arrangement of the liquid supplementing hole, the protection sleeve and the sealing devices, the whole device is more stable, and the test is more accurate.
Description
Technical field
The present invention relates to a kind of sensor, particularly the agricultural acidity-basicity tester of one.
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.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of pH sensor, strengthening the degree of accuracy of sensor further, improve the life-span of sensor.
In order to achieve the above object, the technical scheme that the present invention takes is:
Agricultural acidity-basicity tester, 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, structure of the present invention 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 agricultural acidity-basicity tester of the present invention;
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 present invention is described in detail.
As For the illustrated example; agricultural acidity-basicity tester of the present invention, 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 to invention has been exemplary description; should be noted that; when not departing from core of the present invention, 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 scope of the present invention.
Claims (2)
1. agricultural acidity-basicity tester, 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. agricultural acidity-basicity tester 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 |
|---|---|---|---|
| CN201410525653.1A CN105486730A (en) | 2014-10-08 | 2014-10-08 | Agricultural acid-base value detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410525653.1A CN105486730A (en) | 2014-10-08 | 2014-10-08 | Agricultural acid-base value detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105486730A true CN105486730A (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410525653.1A Pending CN105486730A (en) | 2014-10-08 | 2014-10-08 | Agricultural acid-base value detection apparatus |
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| CN (1) | CN105486730A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066345A (en) * | 2016-07-06 | 2016-11-02 | 江苏智慧农业技术有限公司 | A kind of pH sensor used for aquiculture |
| CN109060908A (en) * | 2018-07-17 | 2018-12-21 | 浙江大学 | A kind of device of the anti-current interference of simple reference electrode |
-
2014
- 2014-10-08 CN CN201410525653.1A patent/CN105486730A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066345A (en) * | 2016-07-06 | 2016-11-02 | 江苏智慧农业技术有限公司 | A kind of pH sensor used for aquiculture |
| CN109060908A (en) * | 2018-07-17 | 2018-12-21 | 浙江大学 | A kind of device of the anti-current interference of simple reference electrode |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |