CN204142678U - A kind of three-electrode electro Chemical gas sensor - Google Patents
A kind of three-electrode electro Chemical gas sensor Download PDFInfo
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- CN204142678U CN204142678U CN201420617534.4U CN201420617534U CN204142678U CN 204142678 U CN204142678 U CN 204142678U CN 201420617534 U CN201420617534 U CN 201420617534U CN 204142678 U CN204142678 U CN 204142678U
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Abstract
The utility model discloses a kind of three-electrode electro Chemical gas sensor, comprise upper cover, lower house, sensor pin, built-in filter, working electrode unit, reference electrode unit, to electrode unit, electrolytic bath, imbibition material block, imbibition material bar, electrolytic solution, fence platelet, waterproof ventilated membrane, annular presses pin and O RunddichtringO, fence platelet is provided with gas diffusion hole, be provided with downward-sloping annular inside mounting hole lower ending opening and press pin, the end that annular presses pin abuts with working electrode unit upper surface, O RunddichtringO is fixed between the waterproof ventilated membrane of upper cover and working electrode unit upper surface, and the upper and lower sides of O RunddichtringO respectively with upper cover lower surface, the waterproof ventilated membrane contact of working electrode unit upper surface.The utility model presses pin by O RunddichtringO and annular and exerts pressure to the electrode of bottom simultaneously, can effectively reduce the resistance between electrode and pin, thus improves sensing resolution, accelerates sensor response speed.
Description
Technical field
The utility model relates to a kind of gas detecting instrument, especially relates to a kind of three-electrode electro Chemical gas sensor.
Background technology
Electrochemical gas sensor (Electrochemical gas sensor) is that measuring object gas is surveyed electric current in the oxidation of electrode place or reduction, draws the detector of object gas concentration.Electrochemical gas sensor application is very wide, can be used for the safety detection of the industries such as chemical industry, mining, military affairs, environment monitoring, production run control etc.This electrochemical gas sensor has that volume is little, detection speed is fast, accurately, be easy to carry, can the particular advantages such as on-the-spot direct-detection and continuous detecting, be better than the past at gas detection methods such as the prevailing optics of above industry and spectrum.It is for the living environment improving the mankind, ensures that people's physical and mental health has important realistic meaning, therefore has good market outlook.
Existing a kind of electrochemical gas sensor as shown in Figure 1, comprise lower house (2), the upper cover (1) suitable with lower house, built-in filter (4), be located at the electrolytic bath (5) of lower house inner bottom part, working electrode unit, reference electrode unit and to electrode unit, on cover and be provided with gas diffusion hole (14), upper cover bottom surface is provided with the cavity be communicated with gas diffusion hole, built-in filter is fixed in cavity, working electrode unit, reference electrode unit, electrode unit is also crimped on successively from top to bottom on electrolytic bath between built-in filter and electrolytic bath, working electrode unit be provided with gap between built-in filter and crimp with upper cover bottom surface, wherein, working electrode unit is made up of imbibition material layer (9) and working electrode (10) from top to bottom, reference electrode unit is made up of imbibition material layer and reference electrode (11) from top to bottom, electrode unit is formed by imbibition material layer with to electrode (12) from top to bottom, upper cover upper surface, the upper and lower surface of built-in filter, working electrode unit upper surface, working electrode unit upper surface, reference electrode unit upper surface, waterproof ventilated membrane (16) is equipped with to electrode unit upper surface and electrolytic bath upper surface, electrolytic bath is hollow and top is provided with the cavity body structure of through hole, electrolytic solution (8) and imbibition material block (6) is provided with in electrolytic tank, imbibition material block is connected with to the imbibition material layer of electrode by the imbibition material bar (7) being arranged in through hole, lower house bottom surface be provided with by lead-in wire respectively with working electrode, reference electrode, to three sensor pin (3) that electrode is connected.Existing electrochemical gas sensor weak point is, upper cover is inadequate to lower electrode pressure, and cause the resistance between electrode and sensor pin comparatively large, cause sensor resolution low further, response speed is slow.
Utility model content
The utility model is that the three-electrode electro Chemical gas sensor resolution in order to solve prior art is lower, the problem that accuracy of detection is not high, response speed is slower, provide a kind of structure simple, resolution is high, fast response time, the three-electrode electro Chemical gas sensor that accuracy of detection is high.
To achieve these goals, the utility model is by the following technical solutions:
A kind of three-electrode electro Chemical gas sensor, comprises upper cover, lower house, sensor pin, built-in filter, working electrode unit, reference electrode unit, to electrode unit, electrolytic bath, imbibition material block, imbibition material bar and electrolytic solution, described working electrode unit is made up of working electrode and imbibition material layer from top to bottom, reference electrode unit is made up of reference electrode and imbibition material layer from top to bottom, electrode unit is formed by electrode and imbibition material layer from top to bottom, cover on described and be provided with mounting hole, the upper end open place of described mounting hole is provided with fence platelet, described fence platelet is provided with gas diffusion hole, be provided with downward-sloping annular inside mounting hole lower ending opening and press pin, working electrode unit, reference electrode unit, be located between upper cover and electrolytic bath electrode unit and be also crimped on successively from top to bottom on electrolytic bath, the end that described annular presses pin abuts with working electrode unit upper surface, upper cover upper surface, bottom gas diffusion hole, working electrode unit upper surface, working electrode unit upper surface, reference electrode unit upper surface, waterproof ventilated membrane is equipped with to electrode unit upper surface and electrolytic bath upper surface, between the waterproof ventilated membrane of upper cover and working electrode unit upper surface, is provided with O RunddichtringO, the upper and lower sides of described O RunddichtringO respectively with upper cover lower surface, the waterproof ventilated membrane contact of working electrode unit upper surface, described built-in filter is located at lower house, fence platelet, in space between the waterproof ventilated membrane of upper cover and working electrode unit upper surface.Fence platelet in the utility model can prevent the filtering material in built-in filter from spilling, and the upper cover in the utility model presses pin with annular, and be provided with O RunddichtringO, press pin by O RunddichtringO and annular to exert pressure to the electrode of bottom simultaneously, the resistance between electrode and pin can be effectively reduced, thus raising sensing resolution, accelerate sensor response speed.
As preferably, the described upper surface of fence platelet and the upper surface flush of upper cover.
As preferably, described annular presses pin and upper cover is homogeneity integrative-structure.
As preferably, the end face that described annular presses pin is set to sphere.
Therefore, the beneficial effects of the utility model are: upper cover presses pin with annular, and are provided with O RunddichtringO, press pin by O RunddichtringO and annular to exert pressure to the electrode of bottom simultaneously, effectively reduce the resistance between electrode and pin, thus improve sensing resolution, accelerate sensor response speed.
Accompanying drawing explanation
Fig. 1 is a kind of structure cut-open view of prior art three-electrode electro Chemical gas sensor.
Fig. 2 is a kind of structure cut-open view of the present utility model.
In figure: upper cover 1, lower house 2, sensor pin 3, built-in filter 4, electrolytic bath 5, imbibition material block 6, imbibition material bar 7, electrolytic solution 8, working electrode 9, imbibition material layer 10, reference electrode 11, to electrode 12, fence platelet 13, gas diffusion hole 14, annular presses pin 15, waterproof ventilated membrane 16, O RunddichtringO 17.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
A kind of three-electrode electro Chemical gas sensor as shown in Figure 2, comprises upper cover 1, lower house 2, sensor pin 3, built-in filter 4, working electrode unit, reference electrode unit, to electrode unit, electrolytic bath 5, imbibition material block 6, imbibition material bar 7 and electrolytic solution 8, working electrode unit is made up of working electrode 9 and imbibition material layer 10 from top to bottom, reference electrode unit is made up of reference electrode 11 and imbibition material layer from top to bottom, electrode unit is formed by electrode 12 and imbibition material layer from top to bottom, on cover and have mounting hole, the upper end open place of mounting hole is provided with fence platelet 13, the upper surface of fence platelet and the upper surface flush of upper cover, and fence platelet has gas diffusion hole 14, inside mounting hole lower ending opening, downward-sloping extending to form with upper cover is that the annular of homogeneity integrative-structure presses pin 15, working electrode unit, reference electrode unit, being located between upper cover and electrolytic bath electrode unit and being crimped on successively from top to bottom on electrolytic bath, the end face that annular presses pin is set to sphere and the end that annular presses pin abuts with working electrode unit upper surface, upper cover upper surface, bottom gas diffusion hole, working electrode unit upper surface, working electrode unit upper surface, reference electrode unit upper surface, waterproof ventilated membrane 16 is equipped with to electrode unit upper surface and electrolytic bath upper surface, waterproof ventilated membrane is ePTFE film, the upper and lower sides being provided with O RunddichtringO 17, O RunddichtringO between the waterproof ventilated membrane of upper cover and working electrode unit upper surface respectively with upper cover lower surface, the waterproof ventilated membrane contact of working electrode unit upper surface, built-in filter is located at lower house, fence platelet, in space between the waterproof ventilated membrane of upper cover and working electrode unit upper surface.
Upper cover in the utility model presses pin with annular, and O RunddichtringO is provided with between upper cover and the waterproof ventilated membrane of working electrode unit upper surface, press pin by O RunddichtringO and annular to exert pressure to the electrode of bottom simultaneously, the resistance between electrode and pin can be effectively reduced, thus raising sensing resolution, accelerate sensor response speed.
Use mechanism of the present utility model makes the interface of electrode and electrolytic solution keep certain potentials to carry out electrolysis, by changing its setting current potential, selectively making gas carry out being oxidized or reducing, thus can quantitatively detect various gas.The utility model is suitable for CO, H
2s, SO
2etc. the detection of various toxic and harmful.
Claims (5)
1. a three-electrode electro Chemical gas sensor, comprises upper cover (1), lower house (2), sensor pin (3), built-in filter (4), working electrode unit, reference electrode unit, to electrode unit, electrolytic bath (5), imbibition material block (6), imbibition material bar (7) and electrolytic solution (8), described working electrode unit is made up of working electrode (9) and imbibition material layer (10) from top to bottom, reference electrode unit is made up of reference electrode (11) and imbibition material layer from top to bottom, electrode unit is formed by electrode (12) and imbibition material layer from top to bottom, it is characterized in that, cover on described and be provided with mounting hole, the upper end open place of described mounting hole is provided with fence platelet (13), described fence platelet is provided with gas diffusion hole (14), be provided with downward-sloping annular inside mounting hole lower ending opening and press pin (15), working electrode unit, reference electrode unit, be located between upper cover and electrolytic bath electrode unit and be also crimped on successively from top to bottom on electrolytic bath, the end that described annular presses pin abuts with working electrode unit upper surface, upper cover upper surface, bottom gas diffusion hole, working electrode unit upper surface, working electrode unit upper surface, reference electrode unit upper surface, waterproof ventilated membrane (16) is equipped with to electrode unit upper surface and electrolytic bath upper surface, between the waterproof ventilated membrane of upper cover and working electrode unit upper surface, is provided with O RunddichtringO (17), the upper and lower sides of described O RunddichtringO respectively with upper cover lower surface, the waterproof ventilated membrane contact of working electrode unit upper surface, described built-in filter is located at lower house, fence platelet, in space between the waterproof ventilated membrane of upper cover and working electrode unit upper surface.
2. a kind of three-electrode electro Chemical gas sensor according to claim 1, is characterized in that, the described upper surface of fence platelet and the upper surface flush of upper cover.
3. a kind of three-electrode electro Chemical gas sensor according to claim 1, is characterized in that, described waterproof ventilated membrane is ePTFE film.
4. a kind of three-electrode electro Chemical gas sensor according to claim 1, is characterized in that, described annular presses pin and upper cover is homogeneity integrative-structure.
5. a kind of three-electrode electro Chemical gas sensor according to claim 1 or 4, it is characterized in that, the end face that described annular presses pin is set to sphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420617534.4U CN204142678U (en) | 2014-10-24 | 2014-10-24 | A kind of three-electrode electro Chemical gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420617534.4U CN204142678U (en) | 2014-10-24 | 2014-10-24 | A kind of three-electrode electro Chemical gas sensor |
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| Publication Number | Publication Date |
|---|---|
| CN204142678U true CN204142678U (en) | 2015-02-04 |
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| CN201420617534.4U Active CN204142678U (en) | 2014-10-24 | 2014-10-24 | A kind of three-electrode electro Chemical gas sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107802408A (en) * | 2017-11-30 | 2018-03-16 | 北京蓝天腾麟医疗科技有限公司 | A kind of more induction point intelligence diapers and its monitoring method |
| CN107850563A (en) * | 2015-08-03 | 2018-03-27 | 新宇宙电机株式会社 | Potentiostatic deposition formula gas sensor |
-
2014
- 2014-10-24 CN CN201420617534.4U patent/CN204142678U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850563A (en) * | 2015-08-03 | 2018-03-27 | 新宇宙电机株式会社 | Potentiostatic deposition formula gas sensor |
| CN107802408A (en) * | 2017-11-30 | 2018-03-16 | 北京蓝天腾麟医疗科技有限公司 | A kind of more induction point intelligence diapers and its monitoring method |
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| GR01 | Patent grant |