CN112964773A - Oxygen sensor and method for improving stability of oxygen sensor - Google Patents
Oxygen sensor and method for improving stability of oxygen sensor Download PDFInfo
- Publication number
- CN112964773A CN112964773A CN202110260759.3A CN202110260759A CN112964773A CN 112964773 A CN112964773 A CN 112964773A CN 202110260759 A CN202110260759 A CN 202110260759A CN 112964773 A CN112964773 A CN 112964773A
- Authority
- CN
- China
- Prior art keywords
- oxygen sensor
- buffer
- oxygen
- sensor
- membrane layer
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
Abstract
The invention provides an oxygen sensor and a method for improving the stability of the oxygen sensor. According to the invention, the buffer component is additionally arranged at the air inlet end of the shell of the sensor body, so that when airflow enters the oxygen sensor, the buffer component can reduce the impact strength of the airflow, the influence of the airflow impact on the oxygen sensing element is avoided, the measurement accuracy of the oxygen sensor can be further ensured, and the stability of the oxygen sensor is improved.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to an oxygen sensor and a method for improving the stability of the oxygen sensor.
Background
The oxygen sensor is inexpensive and easy, and has an advantage of being operable at normal temperature, and therefore is widely used for detecting an oxygen-deficient state in a cabin interior or a manhole, detecting an oxygen concentration in medical equipment such as an anesthesia machine and an artificial respirator, and the like. Generally, a sensing device is arranged inside a shell of the oxygen sensor, and external air flow directly impacts the sensing device after entering the shell, so that the testing precision and stability of the sensing device are influenced.
Therefore, how to improve the stability of the transmission of the electrical signal and ensure the measurement accuracy becomes a problem to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides an oxygen sensor and a method for improving the stability of the oxygen sensor, and aims to improve the measurement accuracy of a piezoelectric acceleration sensor.
In one aspect, embodiments of the present invention provide an oxygen sensor comprising a sensor body and a buffer assembly, the sensor body comprising a housing and an oxygen sensing element contained within the housing; the buffer assembly is connected to the air inlet end of the shell to reduce the impact of air flow on the oxygen sensing element.
According to an aspect of an embodiment of the present invention, the buffer member has air permeability.
According to an aspect of an embodiment of the present invention, the oxygen sensing element includes a positive electrode, a negative electrode, a first film layer, and an electrolyte, which are accommodated in the case; the buffer assembly comprises one or more buffer parts which are stacked along the axial direction of the shell; the cushioning portion includes a second film layer having air permeability.
According to an aspect of an embodiment of the present invention, the second membrane layer has a gas permeation amount of 300ml/min to 400ml/min and a pressure resistance value of 0.3Mpa to 0.5 Mpa.
According to an aspect of embodiments of the present invention, the second film layer has a gas permeability greater than the first film layer.
According to an aspect of the embodiment of the present invention, the buffer portion further includes a support, and the first film layer and the second film layer are disposed at an interval.
According to an aspect of the embodiment of the present invention, the buffer part further includes a support located at a side of the second film layer close to the first film layer; the second film layer is attached to one side surface of the support.
According to an aspect of an embodiment of the present invention, the buffer member is detachably connected to the sensor body.
According to an aspect of the embodiment of the present invention, the buffer assembly further includes a mounting portion, the buffer portion is disposed on the mounting portion, and the mounting portion is connected to the sensor body
In another aspect, an embodiment of the present invention further provides a method for improving stability of an oxygen sensor, in which a buffer assembly having air permeability is disposed at an air inlet end of the oxygen sensor to mitigate impact of an air flow on an oxygen sensing element inside the oxygen sensor.
In the embodiment of the invention, the buffer component is additionally arranged at the air inlet end of the shell of the sensor body, so that when airflow enters the oxygen sensor, the buffer component can reduce the impact strength of the airflow, avoid the influence of the airflow impact on the oxygen sensing element, further ensure the measurement precision of the oxygen sensor and improve the stability of the oxygen sensor.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an oxygen sensor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another oxygen sensor provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of another oxygen sensor provided by an embodiment of the present invention;
FIG. 4 is a prior art oxygen sensor;
FIG. 5 is a graph of the dynamic response of a prior art oxygen sensor;
FIG. 6 is a graph of the dynamic response of an oxygen sensor provided by an embodiment of the present invention.
Description of reference numerals:
1-oxygen sensor, 11-sensor body, 111-housing, 112-oxygen sensing element, 1121-positive electrode, 1122-first membrane layer, 1123-electrolyte, 12 buffer component, 121-second membrane layer, 122-support.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are intended to be illustrative in all directions, and are not intended to limit the specific construction of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For a better understanding of the present invention, the oxygen sensor of the present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an oxygen sensor according to an embodiment of the present invention.
The oxygen sensor 1 of the present embodiment includes a sensor body 11 and a buffer assembly 12. The sensor body 11 includes a case 111 and an oxygen sensing element 112 accommodated in the case 111.
The buffer assembly 12 is connected to the air inlet end of the housing 11 of the sensor body 11 to buffer the impact of the air flow on the oxygen sensing element 12 inside the housing 111.
In the embodiment of the invention, by adding the buffer component 12 at the air inlet end of the shell 111 of the sensor body 11, when airflow enters the oxygen sensor 1, the buffer component 12 can reduce the impact strength of the airflow, so as to prevent the airflow from impacting an oxygen sensing element, thereby ensuring the measurement accuracy of the oxygen sensor and improving the stability of the oxygen sensor.
It is understood that the sensor body may be a dry oxygen sensor, a wet oxygen sensor, or other type of oxygen sensor, and the present application is not limited thereto.
In one specific embodiment, the sensor body 11 is a wet oxygen sensor, the oxygen sensing element 112 includes a positive electrode 1121, a negative electrode (not shown), a first membrane layer 1122, and an electrolyte 1123 contained in the housing 111, the positive electrode 1121 and the negative electrode are both immersed in the electrolyte 1121, the first membrane layer 1122 may be disposed near the air inlet end of the housing 111, a cavity is formed between the first membrane layer 1122 and the housing 111, and the first membrane layer 1122 has a water-proof property to prevent the electrolyte 1123 from overflowing from the housing 11. In addition, the first film 1122 has air permeability so that air can enter the cavity through the first film 1122.
Alternatively, first membrane layer 1122 may be secured at the inlet end of housing 111 by an O-ring that seals the edge of first membrane layer 1122 to prevent electrolyte 1123 from leaking around the edge of first membrane layer 1122. In addition, the O-ring also stretches the first membrane 1122 to remove wrinkles or other irregularities to ensure consistent and consistent diffusion across the surface of the first membrane 1122. The material of the O-ring is not particularly limited, but nitrile rubber, silicone rubber, ethylene propylene rubber, fluorine resin, and the like are generally used.
It is to be understood that the material of the case 111 is not particularly limited in the present application as long as there is no problem of corrosion or the like due to the electrolyte 1123. In a specific example, the housing 111 may employ ABS resin.
The material of the positive electrode 1121 is not particularly limited as long as it can generate a current by electrochemical oxygen reduction at the positive electrode, but a catalyst having redox activity such as gold (Au), silver (Ag), platinum (Pt), or titanium (Ti) is suitably used.
In the oxygen sensor with the conventional structure, in order to shorten the flow stroke of the airflow in the electrolyte 1123 after passing through the first membrane layer 1122 and simultaneously avoid the large deformation of the first membrane layer 1122 when the airflow impacts the first membrane layer 1122, one end of the positive electrode 1121, which is close to the air inlet end of the housing 111, is generally abutted against the first membrane layer 1122. With the above structure, the airflow directly impacts the first film layer 1122, and the first film layer 1122 collides with the positive electrode 1121, so that the positive electrode 1121 is deformed after the first film layer 1122 is deformed, thereby affecting electrochemical oxygen reduction on the positive electrode 1121, and further affecting the testing accuracy and stability of the oxygen sensor.
Therefore, at the buffer assembly 12 added at the air inlet end of the housing 111 of the sensor body 11, when the air flow enters the oxygen sensor 1, the buffer assembly 12 can reduce the impact strength of the air flow, avoid the air flow from impacting the first film 1122, and enable the air flow to pass through the first film 1122 and the anode 1121 at a normal flow rate to generate electrochemical oxygen reduction, so that the measurement accuracy of the oxygen sensor can be ensured, and the stability of the oxygen sensor can be improved.
In some alternative embodiments, the buffer assembly 12 has air permeability, so that external air can smoothly pass through the buffer assembly 12 and enter the sensor body 11, and the buffer assembly 12 can reduce the impact force of the air flow when the external air flow passes through the buffer assembly 12.
It should be noted that the buffer assembly 12 may include one or more buffer portions 121 stacked in the axial direction of the shell 111, and the buffer portion 121 includes a second film layer 121, and the second film layer 121 has air permeability, and the number of the buffer portions 121 may be selected according to actual needs, which is not particularly limited in this application. Alternatively, the second membrane 121 may be secured to the inlet end of the housing 111 by an O-ring that seals the edge of the first membrane 1122 and stretches the first membrane 1122 to remove wrinkles.
It is understood that the number of the buffer portions, i.e., the second film layers 121, can be increased appropriately without affecting the normal flow rate of the air flow, so as to increase the buffering effect.
It is to be understood that the material and thickness of the second film layer 121 are not particularly limited, and may be selected according to the actual application, and for example, a fluororesin such as tetrafluoroethylene resin or tetrafluoroethylene-hexafluoropropylene copolymer, or a polyolefin such as polyethylene may be used. The second film layer 121 further includes a porous film, a non-porous film, and a hole in which a capillary called a capillary type is formed. In a specific embodiment, the second film 121 is a porous resin film having a function of preventing dust or dirt from adhering thereto.
In some alternative embodiments, the second film layer 121 may be selected to have different parameters of pressure resistance, air permeability, etc., so as to widen the application range of the sensor. In a specific embodiment, the second membrane layer 121 has a gas permeability of 300ml/min to 400ml/min and a pressure resistance of 0.3Mpa to 0.5 Mpa.
Optionally, the first film layer 1122 may select different parameters such as pressure resistance and air permeability, and further, the air permeability of the second film layer 121 is greater than or equal to the air permeability of the first film layer 1122, so that external air can flow through the second film layer 121 into the sensor body and the impact force of the air flow can be reduced.
In some optional embodiments, the first film layer 1122 and the second film layer 121 are spaced apart from each other, so as to prevent the second film layer 121 from being deformed and then affecting the first film layer 1122, and at the same time, the airflow has a certain flow path at the air inlet end of the housing 111.
The distance between the first film 1122 and the second film 121 can be selected according to actual needs, and is not particularly limited in this application. Alternatively, the spacing between the first and second film layers 1122, 121 may be selected between 2mm-5 mm. It is possible to achieve both the avoidance of interference between the adjacent first and second membranes 1122, 121 and the achievement of a suitable amount of airflow between the adjacent membranes.
In some optional embodiments, the buffer portion 121 further includes a supporting member 122, the supporting member 122 is located on a side of the second film 121 close to the first film 1122, when the airflow impacts the second film 121, the second film 121 deforms, and the supporting member 122 can prevent the second film 121 from deforming greatly, so as to protect the second film 121 and prevent the second film 121 from being damaged.
In some alternative embodiments, the second film 121 is attached to one side surface of the supporting member 122 to support and protect the second film 121 and prevent the second film 121 from being damaged.
In some alternative embodiments, the supporting member 122 is a plate-shaped structure having a plurality of ventilation holes. In the present application, the material and thickness of the supporting member 122 are not particularly limited, and may be selected according to the actual situation, but a metal such as steel, copper, or aluminum, or a composite material such as carbon fiber is suitably used.
In some alternative embodiments, the damping assembly 12 is removably attached to the sensor body 11 to facilitate replacement of the damping assembly 12.
Referring to fig. 2 and fig. 3 together, fig. 2 is a schematic structural diagram of another oxygen sensor according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of another oxygen sensor according to an embodiment of the present invention.
There are various ways of detachably connecting the buffer assembly 12 to the sensor body 11, and in some alternative embodiments, a step portion may be provided on an inner circumferential surface of the air inlet end of the housing 111, and the buffer assembly 12 may be abutted against the step portion by a fastening member such as an O-ring or a screw, so as to fix the buffer assembly 12 to the air inlet end of the housing 111. In other alternative embodiments, the damping assembly 12 may be disposed within a mounting cylinder having an opening at both ends, the mounting cylinder having threads at one end, the mounting cylinder being threadably coupled to the housing 11.
To better illustrate the effect of the oxygen sensor provided by the present application on the stability of the sensor, the oxygen sensor of the prior art shown in fig. 4 and the oxygen sensor of the present application of one specific structural example shown in fig. 3 are taken as representatives.
Referring to fig. 5 and 6 together, fig. 5 is a dynamic response diagram of a prior art oxygen sensor, and fig. 6 is a dynamic response diagram of an oxygen sensor according to an embodiment of the present invention, in which the oxygen sensor includes a sensor body 11 and a buffer assembly 12. It can be seen that, in the prior art, after 100% oxygen is introduced, the output voltage reaches a peak value first, and then gradually decreases with the passage of time. In the present application, after the second film 121 is added, the output voltage reaches the peak value and does not change with the passage of time. Therefore, the oxygen sensor provided by the application can greatly improve the stability of the sensor.
In addition, the embodiment of the invention also provides a method for improving the stability of the oxygen sensor, which comprises the following steps: a buffer component is arranged at the air inlet end of the oxygen sensor to buffer the impact of air flow on an oxygen sensing element in the oxygen sensor. When the air current gets into oxygen sensor, the impact strength that the buffering subassembly can slow down the air current avoids the air current to strike oxygen sensing element, and then can guarantee oxygen sensor's measurement accuracy, improves oxygen sensor's stability.
It is understood that the buffer assembly may include one or more groups, which is not specifically limited in this application, and when the buffer assembly includes a plurality of groups, each buffer assembly is stacked on the inlet end of the oxygen sensor.
In some optional embodiments, the buffer assembly includes a buffer film and a support member attached to the buffer film, the support member is located on a side of the buffer film close to the oxygen sensing element, and the support member is used for supporting the buffer film to prevent the buffer film from being deformed greatly when being impacted by the airflow. Alternatively, the support member may be a rigid structure member, and the buffer film is disposed in close contact with the support member.
In addition, the support member and the buffer film may be connected to the oxygen sensor in various ways, and in some alternative embodiments, a step portion may be provided on an inner circumferential surface of the inlet end of the oxygen sensor, and the support member and the buffer film may be abutted against the step portion by a fastening member such as an O-ring or a screw. In other alternative embodiments, the support member and the buffer membrane may be stacked and disposed in a cylinder having openings at both ends, and the cylinder may be screwed to the air inlet end of the oxygen sensor.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.
In this application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. An oxygen sensor, comprising,
a sensor body comprising a housing and an oxygen sensing element contained within the housing;
the buffer assembly is connected to the air inlet end of the shell to buffer the impact of the airflow on the oxygen sensing element.
2. The oxygen sensor of claim 1, wherein the buffer component is gas permeable.
3. The oxygen sensor of claim 2, wherein the oxygen sensing element comprises a positive electrode, a negative electrode, a first membrane layer, and an electrolyte contained within the housing;
the buffer assembly comprises one or more buffer parts which are stacked along the axial direction of the shell;
the cushioning portion includes a second film layer having air permeability.
4. The oxygen sensor according to claim 3, wherein the second membrane layer has a gas permeability of 300ml/min to 400ml/min and a pressure resistance of 0.3Mpa to 0.5 Mpa.
5. The oxygen sensor of claim 3, wherein the second membrane layer has a gas permeability that is greater than or equal to the gas permeability of the first membrane layer.
6. The oxygen sensor of claim 3, wherein the first membrane layer is spaced apart from the second membrane layer.
7. The oxygen sensor of any one of claims 1 to 6, wherein the buffer further comprises a support located on a side of the second membrane layer adjacent to the first membrane layer;
the second film layer is attached to one side surface of the support.
8. The oxygen sensor of any one of claims 1 to 6, wherein the buffer assembly is removably attached to the sensor body.
9. The oxygen sensor of any one of claims 1 to 6, wherein the buffer assembly further comprises a mounting portion, the buffer portion being disposed on the mounting portion, the mounting portion being connected to the sensor body.
10. A method of improving the stability of an oxygen sensor, comprising: a buffer component with air permeability is arranged at the air inlet end of the oxygen sensor to reduce the impact of air flow on the oxygen sensing element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110260759.3A CN112964773A (en) | 2021-03-10 | 2021-03-10 | Oxygen sensor and method for improving stability of oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110260759.3A CN112964773A (en) | 2021-03-10 | 2021-03-10 | Oxygen sensor and method for improving stability of oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112964773A true CN112964773A (en) | 2021-06-15 |
Family
ID=76277084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110260759.3A Pending CN112964773A (en) | 2021-03-10 | 2021-03-10 | Oxygen sensor and method for improving stability of oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112964773A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145272A (en) * | 1976-08-23 | 1979-03-20 | Nissan Motor Company, Limited | Oxygen sensor |
| JPS6142305A (en) * | 1984-08-03 | 1986-02-28 | Asahi Glass Co Ltd | Support for separation membrane |
| US5121627A (en) * | 1990-05-21 | 1992-06-16 | Aoust Brian G D | Integrated miniaturized sensor for measuring total dissolved gas and liquid vapor |
| JPH1062320A (en) * | 1996-08-19 | 1998-03-06 | Rimotetsukusu:Kk | Method of measuring dissolved ozone concentration and device therefor |
| US20060249383A1 (en) * | 2005-05-09 | 2006-11-09 | Teledyne Technologies Incorporated | Oxygen sensor assembly and holder therefor |
| US20070277605A1 (en) * | 2006-06-01 | 2007-12-06 | Fouts Richard E | Shield assembly for a gas sensor |
| CN202024980U (en) * | 2011-03-15 | 2011-11-02 | 英思科传感仪器(上海)有限公司 | Improved structure of pressure buffer for oxygen sensor |
| US20120073970A1 (en) * | 2010-09-29 | 2012-03-29 | National Taipei University Of Technology | Amperometric Oxygen Sensor |
| CN108351319A (en) * | 2016-03-23 | 2018-07-31 | 德尔格安全股份两合公司 | Electrochemical gas sensor |
| WO2020034216A1 (en) * | 2018-08-17 | 2020-02-20 | 深圳迈瑞生物医疗电子股份有限公司 | Ventilation apparatus |
| CN212301401U (en) * | 2020-06-28 | 2021-01-05 | 郑州美克盛世电子科技有限公司 | Silicon-resistant electrochemical gas sensor |
| CN212439638U (en) * | 2020-06-30 | 2021-02-02 | 中国兵器工业集团第二一四研究所苏州研发中心 | Porous protection cover of oxygen sensor for breathing machine |
-
2021
- 2021-03-10 CN CN202110260759.3A patent/CN112964773A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145272A (en) * | 1976-08-23 | 1979-03-20 | Nissan Motor Company, Limited | Oxygen sensor |
| JPS6142305A (en) * | 1984-08-03 | 1986-02-28 | Asahi Glass Co Ltd | Support for separation membrane |
| US5121627A (en) * | 1990-05-21 | 1992-06-16 | Aoust Brian G D | Integrated miniaturized sensor for measuring total dissolved gas and liquid vapor |
| JPH1062320A (en) * | 1996-08-19 | 1998-03-06 | Rimotetsukusu:Kk | Method of measuring dissolved ozone concentration and device therefor |
| US20060249383A1 (en) * | 2005-05-09 | 2006-11-09 | Teledyne Technologies Incorporated | Oxygen sensor assembly and holder therefor |
| US20070277605A1 (en) * | 2006-06-01 | 2007-12-06 | Fouts Richard E | Shield assembly for a gas sensor |
| US20120073970A1 (en) * | 2010-09-29 | 2012-03-29 | National Taipei University Of Technology | Amperometric Oxygen Sensor |
| CN202024980U (en) * | 2011-03-15 | 2011-11-02 | 英思科传感仪器(上海)有限公司 | Improved structure of pressure buffer for oxygen sensor |
| CN108351319A (en) * | 2016-03-23 | 2018-07-31 | 德尔格安全股份两合公司 | Electrochemical gas sensor |
| WO2020034216A1 (en) * | 2018-08-17 | 2020-02-20 | 深圳迈瑞生物医疗电子股份有限公司 | Ventilation apparatus |
| CN212301401U (en) * | 2020-06-28 | 2021-01-05 | 郑州美克盛世电子科技有限公司 | Silicon-resistant electrochemical gas sensor |
| CN212439638U (en) * | 2020-06-30 | 2021-02-02 | 中国兵器工业集团第二一四研究所苏州研发中心 | Porous protection cover of oxygen sensor for breathing machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10557561B2 (en) | Pressure-compensation device for a housing | |
| JP5489714B2 (en) | Pressure regulating valve for electronic parts and electronic parts using the same | |
| EP2494347B1 (en) | Electrochemical sensors including electrodes with diffusion barriers | |
| US6024853A (en) | Electrochemical oxygen sensor | |
| US8083914B2 (en) | Electrochemical gas sensor | |
| CN108351319B (en) | Electrochemical gas sensor | |
| US10976279B2 (en) | Method and apparatus of electrolyte concentration measurement | |
| US7727369B2 (en) | Gas sensor | |
| US10816503B2 (en) | Electrochemical gas sensor for detecting hydrogen cyanide gas | |
| JP5521053B2 (en) | Sensor with vent member | |
| CN112964773A (en) | Oxygen sensor and method for improving stability of oxygen sensor | |
| JP4996132B2 (en) | Fuel cell and manufacturing method thereof | |
| JP4760469B2 (en) | Humidifier and fuel cell system | |
| US20190252703A1 (en) | Inspection method of fuel cell and inspection system thereof | |
| US8465882B2 (en) | Membrane-electrode assembly for solid polymer electrolyte fuel cell and solid polymer electrolyte fuel cell | |
| EP3674701B1 (en) | Electrochemical gas sensor assembly | |
| JP6474285B2 (en) | Constant potential electrolytic gas sensor | |
| JP3693890B2 (en) | Fluctuating pressure sensor | |
| JP2006172871A (en) | Fuel cell | |
| JP2001048188A (en) | Gas exhaust valve | |
| JP2002071621A (en) | Constant potential electrolytic gas sensor | |
| JP2008070165A (en) | Sensor device | |
| JP3042616B2 (en) | Constant potential electrolytic gas sensor | |
| JP2014232723A (en) | Test method of electrode member for fuel cell, and test device | |
| EP4006208A1 (en) | Alkaline water electrolytic cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |