CN113418973A - Electrochemical sensor - Google Patents
Electrochemical sensor Download PDFInfo
- Publication number
- CN113418973A CN113418973A CN202110481541.0A CN202110481541A CN113418973A CN 113418973 A CN113418973 A CN 113418973A CN 202110481541 A CN202110481541 A CN 202110481541A CN 113418973 A CN113418973 A CN 113418973A
- Authority
- CN
- China
- Prior art keywords
- shell
- gas
- electrolyte
- electrochemical sensor
- 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.)
- Pending
Links
- 239000003792 electrolyte Substances 0.000 claims abstract description 88
- 239000004065 semiconductor Substances 0.000 claims abstract description 70
- 238000005057 refrigeration Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000012528 membrane Substances 0.000 claims description 31
- 239000008151 electrolyte solution Substances 0.000 claims description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 34
- 230000000694 effects Effects 0.000 abstract description 27
- 230000008569 process Effects 0.000 abstract description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 23
- 235000017491 Bambusa tulda Nutrition 0.000 description 23
- 241001330002 Bambuseae Species 0.000 description 23
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 23
- 239000011425 bamboo Substances 0.000 description 23
- 230000008859 change Effects 0.000 description 9
- 230000033228 biological regulation Effects 0.000 description 7
- 230000008602 contraction Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- G01N27/28—Electrolytic cell components
-
- 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
- G01N27/416—Systems
Abstract
The invention relates to the technical field of sensors, in particular to an electrochemical sensor; the device comprises an electrode module, an electrolyte module, a shell and a controller; a through air chamber is arranged in the shell; because the special gas used for detection by the electrochemical sensor is often in an indoor environment and the gas molecules are required to be dissipated and accumulated in the electrochemical sensor in the indoor environment to be detected, the process often requires tens of seconds to several minutes, and the timeliness of the function of the electrochemical sensor is limited by the delay generated by the process; therefore, the semiconductor refrigeration piece enables heat generated at the upper part and the lower part of the shell to be exchanged under the operation state, so that gas in the shell area is in a flowing state under the influence of temperature difference, the gas in the indoor environment is guided to flow through the gas chamber communicated with the shell through the gas-permeable film, the speed of the detected gas entering the gas chamber is increased, and the detection effect of the electrochemical sensor is improved.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to an electrochemical sensor.
Background
The sensor is a device capable of sensing information and converting the information into a measurable signal, is an important basic technology of a new technical revolution and an information society, is developed rapidly, and becomes an important component in modern life; according to different induction signals, sensors can be divided into physical sensors and chemical sensors, and electrochemical sensors in the chemical sensors are widely applied due to the advantages of high sensitivity, low energy consumption and stable signals; the electrochemical sensors can be divided into three types of electrochemical sensors, namely a potential type electrochemical sensor, a current type electrochemical sensor and a conductance type electrochemical sensor according to different output signals of the electrochemical sensors; the operation generally involves the target gas molecules in contact with the sensor first passing through a membrane that prevents condensation, the gas molecules diffusing through a capillary tube, passing through a subsequent filter, and then through a hydrophobic membrane to the surface of the sensing electrode, causing the molecules to be immediately oxidized or reduced, thereby generating or consuming electrons, thereby generating an electric current.
The gas to be detected of the electrochemical sensor enters an electrode in the electrochemical sensor, and the current generated by generating or consuming electrons is captured by the sensor to realize the function detection of the electrochemical sensor; the special gas for detection of the electrochemical sensor is often in an indoor environment, and the gas molecules are required to be dissipated and accumulated in the electrochemical sensor in the indoor environment to be detected, so that the process often requires tens of seconds to several minutes, and the timeliness of the function of the electrochemical sensor is limited by the delay caused by the dissipation.
One chinese patent application No. CN201510239434.1 discloses an electrochemical sensor for determining at least a physical and/or chemical parameter of a measuring medium, the sensor comprising a sensor head, a sensor chip having a sensitive area, a sensor body having an end piece, a sealing means and a pressure applying element; wherein the sensor body is connected to the sensor head, wherein the end piece is a hollow body with a closed end region and a measurement opening through which the measurement medium is brought into contact during operation with a sensitive region of a sensor chip which is arranged inside the hollow body during operation; wherein the sealing means surrounds the measuring opening, omitting the sensitive area of the sensor chip and sealing the interior of the end piece against the measuring medium during operation; the pressing element presses the sensor chip against the sealing means and the edge of the measuring opening; the end piece in this solution has an integral gap-free design in the region that is in contact with the measuring medium during operation; however, the technical scheme does not solve the problem that in the resetting process of the sensor body after the measuring medium is detected, the measuring medium remained in the end piece of the sensor is difficult to effectively clear, and the sensor misjudges the concentration of the subsequent measuring medium.
In view of the above, the present invention provides an electrochemical sensor, which solves the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides the electrochemical sensor, the semiconductor refrigerating sheet is arranged, the heat exchange generated at the upper part and the lower part of the shell is realized under the operation state, the gas in the shell area is in a flowing state under the influence of temperature difference, then the gas in the indoor environment is guided to flow through the gas chamber penetrating through the shell through the gas-permeable film, the speed of the detected gas entering the gas chamber is increased, and the detection effect of the electrochemical sensor is improved.
The invention relates to an electrochemical sensor which comprises an electrode module, an electrolyte module, a shell and a controller, wherein the electrolyte module is arranged in the shell; the electrode module and the electrolyte module are respectively installed at two ends of the shell, the shell is further provided with an air chamber outside the electrolyte module, the top end of the shell is further provided with a breathable film, and the breathable film is used for screening gas molecules entering the air chamber; the air chamber penetrates through the shell, and the caliber of the air chamber in the shell is gradually reduced from the end of the breathable film; the electrode module and the electrolyte module are circumferentially distributed in a shell of the circumferential direction of the air chamber; the electrode module is also provided with pins electrically connected with the shell towards the outer side of the shell, and the electrode module also comprises an indicating electrode, a counter electrode and a reference electrode; the indicating electrode is close to the gas-permeable membrane; the counter electrode and the reference electrode are positioned at the end part far away from the breathable film in the shell; the electrolyte module also comprises an electrolyte cavity, electrolyte solution is filled in the electrolyte cavity, an indicating electrode which is electrically connected is arranged on the side wall of the electrolyte cavity facing the gas chamber, and a counter electrode and a reference electrode which are electrically connected are arranged on the side wall of the electrolyte cavity facing the shell; the end of the electrolyte cavity is provided with a pair of annular semiconductor refrigerating pieces, and two ends of the electrolyte cavity are respectively contacted with a cold source and a heat source of the semiconductor refrigerating pieces; the semiconductor refrigerating piece is electrically connected with the pin, and a temperature sensor is arranged in the shell part where the semiconductor refrigerating piece is positioned; the controller is used for regulating the operation of the electrochemical sensor;
in the prior art, gas to be detected by an electrochemical sensor enters an electrode in the electrochemical sensor, and current generated by generated or consumed electrons is captured by the sensor to realize function detection of the electrochemical sensor; the special gas used for detection of the electrochemical sensor is often in an indoor environment and can be detected only by accumulating the escape of gas molecules in the indoor environment into the electrochemical sensor, and the process often requires tens of seconds to several minutes, so that the timeliness of the function of the electrochemical sensor is limited by the generated delay;
therefore, when the invention works, the pin on the shell is connected into the circuit to enable the electrochemical sensor to start to operate, the temperature sensor at the end part of the shell transmits the detected temperature data to the controller, and changes the temperature of the semiconductor refrigerating sheet at the two ends of the electrolyte cavity under the regulation of the temperature sensor, so that the electrolyte solution in the electrolyte cavity is in a normal temperature condition, the arranged reference electrode is used for feeding back the current parameter of the electrolyte when the gas is not detected, and the semiconductor refrigerating sheet enables the electrolyte solution to be maintained in the normal temperature condition, thereby ensuring the electronic variation in the electrolyte when the gas molecules are detected, maintaining the accuracy of the current variation between the indicating electrode and the counter electrode, gradually reducing the caliber of the gas chamber in the shell, enabling the indicating electrode to incline to the inner wall of the gas chamber, and increasing the contact area between the indicating electrode and the detecting gas under the condition of maintaining the contact state between the indicating electrode and the detecting gas, the gas flow entering from the gas-permeable membrane circularly flows through the gas chamber arranged in the shell, so that the gas concentration change in the indoor environment can be detected in time, and the situation that the electrochemical sensor is still in a judging state due to the residual high-concentration detection gas in the gas chamber after the detection gas in the indoor environment is recovered to the safe concentration is avoided.
Preferably, the end part of the breathable film of the shell is also provided with an annular air bag, the air bag is fixedly connected inside the shell and is in contact with the semiconductor refrigerating sheet at the top end of the electrolyte cavity, and the air bag expands under the action of a heat source of the semiconductor refrigerating sheet; the shell is sleeved outside the electrolyte cavity; when the temperature control device works, when the ambient temperature is higher than the normal temperature of the electrolyte solution, the controller starts the semiconductor refrigerating sheet at the top end of the electrolyte cavity to cool the electrolyte solution, the heat dissipation capacity generated by the semiconductor refrigerating sheet in the running process is larger than the refrigerating capacity of the semiconductor refrigerating sheet, the shell wraps the air bag on the semiconductor refrigerating sheet at the top end of the electrolyte cavity, the generated local temperature rise is limited in the air bag area, so that the small-volume air bag generates micro expansion enough to jack the shell and generate a gap at the bottom end of the air bag, the bottom of the electrolyte cavity is exposed to the environment, cold air of the semiconductor refrigerator flows out from the bottom end of the electrolyte cavity in the gap at the bottom of the shell downwards along the air chamber, the temperature control effect of the semiconductor refrigerating sheet on the electrolyte cavity is ensured, and when the ambient temperature is lower than the normal temperature of the electrolyte solution, the semiconductor refrigerating sheet at the bottom end of the electrolyte cavity is started, the heat source of the semiconductor refrigeration piece heats the electrolyte solution to a normal temperature state, and the shrinkage of the air bag enables the bottom of the shell to tightly wrap the electrolyte cavity, so that cold air on the cold source of the semiconductor refrigeration piece is completely discharged from the bottom end of the air chamber, the electrolyte cavity is prevented from being affected, and the detection effect of the electrochemical sensor is maintained.
Preferably, two ends of the shell are respectively provided with an annular copper sheet, the copper sheets extend to the outer wall of the shell from the end parts of the shell, one end of each copper sheet is in contact with the surface, facing the electrolyte cavity, of the semiconductor refrigeration sheet, and the other end of each copper sheet is in contact with the end face of the indicating electrode in the air chamber; the during operation, semiconductor refrigeration piece temperature regulation effect, carry out heat-conduction through the copper sheet that sets up at the casing tip, avoid static electrolyte solution more than the lower heat-conduction efficiency in the electrolyte cavity and influence the regulation speed of its temperature, and the copper sheet extends to on the outer wall of casing, the radiating effect when reinforcing when moving semiconductor refrigeration piece, and increased the gasbag and received the heat-conduction effect of semiconductor refrigeration piece, the copper sheet still conducts semiconductor sensor's temperature to the indicator electrode simultaneously, make the temperature of indicator electrode press close to with the normal atmospheric temperature condition, and then make the gas of circulation in the air chamber after contacting the indicator electrode, make the gas of being surveyed maintain under suitable detection temperature, in order to keep the detection precision to gas concentration, thereby electrochemical sensor's detection effect has been promoted.
Preferably, the inner wall of the breathable film is also provided with a rubber cover, and the breathable film protrudes towards the outer side of the shell; the rubber cover is umbrella-shaped and is fixedly adhered to the center of the breathable film, and the diameter of the rubber cover is the same as the minimum diameter of the air chamber at the bottom of the shell; the during operation, the regional gas of electrochemical sensor place has multiple flow direction, through setting up outside bellied ventilated membrane on the casing, and then make the ventilated membrane can catch the axial air current of perpendicular to air chamber in the environment, electrochemical sensor has been increased to the gaseous capture effect of quilt in the environment, and then shortened the detection induction time to detecting gas, umbrella-shaped structure's rubber cover diameter is the same with the minimum diameter of air chamber simultaneously, make from the ventilated membrane entering to be detected gas by the rubber cover water conservancy diversion to the air chamber lateral wall of circumference on, avoid along the regional circumstances of being surveyed the gas and not contacting the indicator electrode that flows in air chamber axle center, maintain the detection efficiency of indicator electrode to gas, thereby electrochemical sensor's detection effect has been stabilized.
Preferably, a conical hoop cylinder is further arranged below the rubber cover, the top of the hoop cylinder is wrapped on the outer side of the edge of the bottom end of the rubber cover, and the bottom of the hoop cylinder is flush with the bottom surface of the electrolyte cavity; the bottom of the rubber cover is also provided with a surrounding wedge groove which is inclined to the axial direction of the rubber cover and enables the bottom of the rubber cover to be in an overlapped state when being pressed; when the air bag type refrigerating device works, the expansion and contraction states of the air bag are changed due to the change of the ambient temperature and the temperature of the semiconductor refrigerating sheet, and the shell is driven to generate corresponding displacement; through setting up the hoop section of thick bamboo in the pole setting, make the shrink deformation of gasbag under low temperature environment drive the casing and descend, make the ventilated membrane on the casing push down the rubber cover, make the bottom of rubber cover draw in by hoop section of thick bamboo in the reduction in-process, and then reduce the regional back of small bore in the air chamber at the rubber cover, reduce the diameter of rubber cover through hoop section of thick bamboo, avoid influencing the sectional area of air chamber, in order to maintain stable gas flow wherein, and through the wedge groove guide rubber cover push down the deformation trend of contraction state that sets up, prevent the bottom port card of rubber cover at the top of hoop section of thick bamboo, after the breathing state of gasbag resumes, be convenient for the rubber cover smoothly breaks away from in the hoop section of thick bamboo, thereby electrochemical sensor's detection effect has been stabilized.
Preferably, a supporting plate is further arranged below the hoop cylinder, and a spring is fixedly connected between the hoop cylinder and the supporting plate; two ends of the supporting plate are fixed on the bottom surface of the shell; during the operation, the effort that the rubber cover pushed down is transmitted to a hoop section of thick bamboo to carry out the energy storage through the spring between hoop section of thick bamboo and the layer board, and then the energy that utilizes the spring at the in-process that the ventilated membrane resumes the height promotes a hoop section of thick bamboo and bounce the rubber cover, and the casing is at the rising in-process under the gasbag expanding action, the layer board that links firmly through the spring bottom will hoop section of thick bamboo jack-up, and then lift up the rubber cover and maintain the supporting role to the ventilated membrane center, keep the gesture of protrusion in the casing top, thereby electrochemical sensor's detection effect has been stabilized.
The invention has the following beneficial effects:
1. according to the invention, the semiconductor refrigeration piece is arranged, so that heat generated at the upper part and the lower part of the shell is exchanged under the operation state, gas in the shell area is in a flowing state under the influence of temperature difference, and then the gas in the indoor environment is guided to flow through the gas chamber communicated with the shell through the gas permeable film, and the speed of the detected gas entering the gas chamber is increased.
2. According to the invention, heat generated by the semiconductor refrigeration piece in the operation is conducted to the air bag above the semiconductor refrigeration piece, so that the air bag is heated and expanded to jack the shell, a gap is formed at the bottom of the shell, the bottom of the electrolyte cavity is exposed to the environment, cold air of the semiconductor refrigeration piece flows out from the bottom end of the electrolyte cavity in the gap at the bottom of the shell downwards along the air chamber, and the temperature control effect of the semiconductor refrigeration piece on the electrolyte cavity is ensured.
3. According to the invention, the shrink deformation of the air bag in a low-temperature environment drives the shell to descend through the hoop barrel arranged on the upright rod, so that the air-permeable membrane on the shell presses the rubber cover, the bottom end of the rubber cover is folded by the hoop barrel in the process of descending, and the diameter of the rubber cover is reduced through the hoop barrel after the rubber cover is lowered to a small-caliber area in the air chamber, so that the influence on the sectional area of the air chamber is avoided, and the stable gas flow is maintained.
Drawings
The invention is further described with reference to the following figures and embodiments.
FIG. 1 is an exploded view of an electrochemical sensor according to the present invention;
FIG. 2 is a cross-sectional view of an electrochemical sensor according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
in the figure: the device comprises a shell 1, a pin 11, an air bag 12, a copper sheet 13, an air chamber 2, a breathable film 3, an indicating electrode 4, a counter electrode 41, a reference electrode 42, an electrolyte cavity 5, a semiconductor refrigeration sheet 6, a rubber cover 7, a wedge groove 71, a hoop barrel 8, a spring 81 and a supporting plate 9.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 3, an electrochemical sensor according to the present invention includes an electrode module, an electrolyte module, a case 1, and a controller; the electrode module and the electrolyte module are respectively installed at two ends of the shell 1, the shell 1 is further provided with an air chamber 2 at the outer side of the electrolyte module, the shell 1 is further provided with a breathable film 3 at the top end of the air chamber 2, and the breathable film 3 is used for screening gas molecules entering the air chamber 2; the air chamber 2 penetrates through the shell 1, and the caliber of the air chamber 2 in the shell 1 is gradually reduced from the end of the air permeable membrane 3; the electrode modules and the electrolyte modules are distributed in the shell 1 around the circumference of the air chamber 2; the electrode module is also provided with a pin 11 which is electrically connected with the outer side of the shell 1, and the electrode module also comprises an indicating electrode 4, a counter electrode 41 and a reference electrode 42; the indicating electrode 4 is close to the gas permeable membrane 3; the counter electrode 41 and the reference electrode 42 are located at the ends of the case 1 away from the gas permeable membrane 3; the electrolyte module also comprises an electrolyte cavity 5, electrolyte solution is filled in the electrolyte cavity 5, an indicating electrode 4 which is electrically connected is arranged on the side wall of the electrolyte cavity 5 facing the gas chamber 2, and a counter electrode 41 and a reference electrode 42 which are electrically connected are arranged on the side wall of the electrolyte cavity 5 facing the shell 1; a pair of annular semiconductor refrigerating sheets 6 are arranged at the end part of the electrolyte cavity 5, and two ends of the electrolyte cavity 5 are respectively contacted with a cold source and a heat source of the semiconductor refrigerating sheets 6; the semiconductor refrigerating sheet 6 is electrically connected with the pin 11, and a temperature sensor is also arranged in the part, where the semiconductor refrigerating sheet 6 is located, of the shell 1; the controller is used for regulating the operation of the electrochemical sensor;
in the prior art, gas to be detected by an electrochemical sensor enters an electrode in the electrochemical sensor, and current generated by generated or consumed electrons is captured by the sensor to realize function detection of the electrochemical sensor; the special gas used for detection of the electrochemical sensor is often in an indoor environment and can be detected only by accumulating the escape of gas molecules in the indoor environment into the electrochemical sensor, and the process often requires tens of seconds to several minutes, so that the timeliness of the function of the electrochemical sensor is limited by the generated delay;
therefore, when the invention works, the pin 11 on the shell 1 is connected into the circuit to start the electrochemical sensor, the temperature sensor at the end of the shell 1 transmits the detected temperature data to the controller, and changes the temperature of the semiconductor chilling plates 6 at the two ends of the electrolyte cavity 5 under the regulation of the temperature data, so that the electrolyte solution in the electrolyte cavity 5 is in the normal temperature condition, the reference electrode 42 is arranged to feed back the current parameter of the electrolyte when no gas is detected, and the semiconductor chilling plates 6 maintain the electrolyte solution in the normal temperature condition, thereby ensuring the electronic change amount in the electrolyte when gas molecules are detected, maintaining the accuracy of the current change between the indicating electrode 4 and the counter electrode 41, and the gradually reduced caliber of the gas chamber 2 in the shell 1, making the indicating electrode 4 incline to the inner wall of the gas chamber 2, and maintaining the contact state between the indicating electrode 4 and the detection gas, the contact area between the gas-permeable membrane and the gas-permeable membrane is increased, the gas flow entering from the gas-permeable membrane 3 flows circularly through the gas chamber 2 arranged in the shell 1, so that the gas concentration change in the indoor environment can be detected in time, and the situation that the electrochemical sensor is still in a judging state due to the high-concentration detection gas remained in the gas chamber 2 after the detection gas in the indoor environment is recovered to the safe concentration is avoided.
As an embodiment of the invention, the shell 1 is further provided with an annular air bag 12 at the end part of the air permeable membrane 3, the air bag 12 is fixedly connected inside the shell 1 and is in contact with the semiconductor refrigerating sheet 6 at the top end of the electrolyte cavity 5, and the air bag 12 is expanded under the action of a heat source of the semiconductor refrigerating sheet 6; the shell 1 is sleeved on the outer side of the electrolyte cavity 5; when the refrigerator works, when the ambient temperature is higher than the normal temperature of the electrolyte solution, the controller starts the semiconductor refrigerating sheet 6 at the top end of the electrolyte cavity 5 to cool the electrolyte solution, the heat dissipation capacity generated by the semiconductor refrigerating sheet 6 in the running process is larger than the refrigerating capacity, the shell 1 wraps the air bag 12 on the semiconductor refrigerating sheet 6 at the top end of the electrolyte cavity 5, the generated local temperature rise is limited in the area of the air bag 12, so that the small-volume air bag 12 generates micro expansion enough to jack the shell 1 and generate a gap at the bottom end of the shell, the bottom of the electrolyte cavity 5 is exposed to the environment, cold air of the semiconductor refrigerator flows downwards along the air chamber 2 from the bottom end of the electrolyte cavity 5 in the gap at the bottom of the shell 1, the temperature control effect of the semiconductor refrigerating sheet 6 on the electrolyte cavity 5 is ensured, and when the ambient temperature is lower than the normal temperature of the electrolyte solution, the semiconductor refrigeration piece 6 at the bottom end of the electrolyte cavity 5 is started, so that the heat source of the semiconductor refrigeration piece 6 heats the electrolyte solution to a normal temperature state, and meanwhile, the contraction of the airbag 12 enables the bottom of the shell 1 to tightly wrap the electrolyte cavity 5, so that cold air on a cold source of the semiconductor refrigeration piece 6 is completely discharged from the bottom end of the air chamber 2, the electrolyte cavity 5 is prevented from being influenced, and the detection effect of the electrochemical sensor is maintained.
As an embodiment of the invention, two ends of the shell 1 are respectively provided with an annular copper sheet 13, the copper sheet 13 extends from the end of the shell 1 to the outer wall of the shell, one end of the copper sheet 13 is in contact with the surface of the semiconductor refrigeration sheet 6 facing the electrolyte cavity 5, and the other end of the copper sheet 13 is in contact with the end face of the indicating electrode 4 in the air chamber 2; during operation, semiconductor refrigeration piece 6 temperature regulation effect, carry out heat-conduction through the copper sheet 13 that sets up at casing 1 tip, avoid static electrolyte solution more than the lower heat conduction efficiency in electrolyte cavity 5 and influence the regulation speed of its temperature, and copper sheet 13 extends to on the outer wall of casing 1, the radiating effect when reinforcing when to semiconductor refrigeration piece 6 operation, and increased gasbag 12 and received semiconductor refrigeration piece 6 heat conduction effect, copper sheet 13 still conducts semiconductor sensor's temperature to indicating electrode 4 on simultaneously, make indicating electrode 4's temperature press close to with the normal atmospheric temperature condition, and then make the gas that flows through in the air chamber 2 after contacting indicating electrode 4, make the gas that is surveyed maintain under the suitable detection temperature, in order to keep the detection precision to gas concentration, thereby electrochemical sensor's detection effect has been promoted.
As an embodiment of the present invention, the inner wall of the breathable film 3 is further provided with a rubber cover 7, and the breathable film 3 protrudes to the outside of the shell 1; the rubber cover 7 is umbrella-shaped and is fixedly adhered to the center of the breathable film 3, and the diameter of the rubber cover 7 is the same as the minimum diameter of the air chamber 2 at the bottom of the shell 1; the during operation, the regional gas of electrochemical sensor is located has multiple flow direction, through setting up outside bellied ventilated membrane 3 on casing 1, and then make ventilated membrane 3 can catch 2 axial air currents of perpendicular to air chamber in the environment, the capture effect of electrochemical sensor to being surveyed the gas in the environment has been increased, and then the detection induction time to detecting gas has been shortened, 7 diameters of canopy of umbrella-shaped structure are the same with the minimum diameter of air chamber 2 simultaneously, make from the detected gas that ventilated membrane 3 got into by canopy 7 water conservancy diversion to 2 lateral walls of air chamber of circumference, avoid along 2 axle center regional mobile by the measured gas condition of not contacting indication electrode 4 of air chamber, maintain the detection efficiency of indication electrode 4 to gas, thereby electrochemical sensor's detection effect has been stabilized.
As an embodiment of the invention, a conical hoop tube 8 is further arranged below the rubber cover 7, the top of the hoop tube 8 is wrapped on the outer side of the edge of the bottom end of the rubber cover 7, and the bottom of the hoop tube 8 is flush with the bottom surface of the electrolyte cavity 5; the bottom of the rubber cover 7 is also provided with a surrounding wedge groove 71, the wedge groove 71 is inclined to the axial direction of the rubber cover 7, and the bottom of the rubber cover 7 is in an overlapped state when being pressed; when the air bag type refrigerating device works, the expansion and contraction states of the air bag 12 are changed by the change of the ambient temperature and the temperature of the semiconductor refrigerating sheet 6, and the shell 1 is driven to generate corresponding displacement; through setting up the hoop section of thick bamboo 8 in the pole setting, make gasbag 12 shrink deformation under low temperature environment drive casing 1 and descend, make ventilated membrane 3 on the casing 1 push down the rubber cover 7, make the bottom of rubber cover 7 draw in by hoop section of thick bamboo 8 in the reduction process, and then reduce the regional back of small bore in the air chamber 2 at the rubber cover 7, reduce the diameter of rubber cover 7 through hoop section of thick bamboo 8, avoid influencing the sectional area of air chamber 2, in order to maintain stable gas flow wherein, and through the deformation trend of the wedge groove 71 guide rubber cover 7 that sets up under the compression state, prevent the bottom port card of rubber cover 7 at the top of hoop section of thick bamboo 8, after the breathing state recovery of gasbag 12, be convenient for rubber cover 7 from the smooth and easy break away from in hoop section of thick bamboo 8, thereby electrochemical sensor's detection effect has been stabilized.
As an embodiment of the invention, a supporting plate 9 is further arranged below the hoop cylinder 8, and a spring 81 is fixedly connected between the hoop cylinder 8 and the supporting plate 9; two ends of the supporting plate 9 are fixed on the bottom surface of the shell 1; during operation, the effort that the jiao gai 7 pushed down is transmitted to hoop section of thick bamboo 8 to spring 81 through hoop section of thick bamboo 8 and layer board 9 between carries out the energy storage, and then utilize spring 81's energy promotion hoop section of thick bamboo 8 to bounce the jiao gai 7 at the in-process that ventilated membrane 3 regained the height, and casing 1 rising in-process under the 12 inflation effects of gasbag, layer board 9 through the spring 81 bottom link firmly will hoop section of thick bamboo 8 jack-up, and then lift the support effect that the jiao gai 7 maintains the ventilated membrane 3 center, keep the gesture of ventilated membrane 3 protrusion in casing 1 top, thereby electrochemical sensor's detection effect has been stabilized.
The specific working process is as follows:
the electrochemical sensor is started to operate by connecting a pin 11 on the shell 1 into a circuit, the temperature sensor at the end part of the shell 1 transmits detected temperature data to the controller, the temperature of the semiconductor refrigeration sheets 6 at the two ends of the electrolyte cavity 5 is changed under the regulation of the temperature data, so that the electrolyte solution in the electrolyte cavity 5 is in a normal temperature condition, the arranged reference electrode 42 is used for feeding back current parameters of the electrolyte when gas is not detected, the semiconductor refrigeration sheets 6 maintain the electrolyte solution in the normal temperature condition, the electronic change quantity in the electrolyte when gas molecules are detected is ensured, the accuracy of the current change between the indicating electrode 4 and the counter electrode 41 is maintained, the caliber of the gas chamber 2 in the shell 1 is gradually reduced, the indicating electrode 4 is inclined to the inner wall of the gas chamber 2, and under the condition that the contact state between the indicating electrode 4 and the detected gas is maintained, the contact area between the gas-permeable membrane and the gas-permeable membrane is increased, and the gas flow entering from the gas-permeable membrane 3 circularly flows through the gas chamber 2 arranged in the shell 1, so that the gas concentration change in the indoor environment can be detected in time, and the situation that the electrochemical sensor is still in a judgment state due to the residual high-concentration detection gas in the gas chamber 2 after the detection gas in the indoor environment is recovered to the safe concentration is avoided; when the ambient temperature is higher than the normal temperature condition of the electrolyte solution, the controller starts the semiconductor refrigeration sheet 6 at the top end of the electrolyte cavity 5 to cool the electrolyte solution, the heat generated by the semiconductor refrigeration sheet 6 in operation is conducted to the air bag 12 above the semiconductor refrigeration sheet 6 to enable the air bag 12 to be heated and expanded to jack up the shell 1, then a gap is formed at the bottom of the shell 1 to expose the bottom of the electrolyte cavity 5 to the environment, so that cold air of the semiconductor refrigerator flows out from the bottom end of the electrolyte cavity 5 in the gap at the bottom of the shell 1 downwards along the air chamber 2 to ensure the temperature control effect of the semiconductor refrigeration sheet 6 on the electrolyte cavity 5, when the ambient temperature is lower than the normal temperature condition of the electrolyte solution, the semiconductor refrigeration sheet 6 at the bottom end of the electrolyte cavity 5 is started to enable the heat source of the semiconductor refrigeration sheet 6 to heat the electrolyte solution to the normal temperature state, and simultaneously the bottom of the air bag 12 enables the electrolyte cavity 5 to be tightly wrapped up, cold air on a cold source of the semiconductor refrigeration sheet 6 is completely discharged from the bottom end of the air chamber 2, so that the electrolyte cavity 5 is prevented from being influenced; the hoop section of thick bamboo 8 of setting in the pole setting, make gasbag 12 shrink deformation under low temperature environment drive casing 1 and descend, make ventilated membrane 3 on the casing 1 push down the jiao gai 7, make the bottom of jiao gai 7 draw in by hoop section of thick bamboo 8 in the reduction process, and then reduce the regional back of small bore in the air chamber 2 at jiao gai 7, reduce the diameter of jiao gai 7 through hoop section of thick bamboo 8, avoid influencing the sectional area of air chamber 2, in order to maintain stable gas flow wherein, and through the deformation trend of the wedge groove 71 guide pressure contraction state under the jiao gai 7 that sets up, prevent the bottom port card of jiao gai 7 at the top of hoop section of thick bamboo 8, after the breathing state recovery of gasbag 12, be convenient for the jiao gai 7 from the smooth and easy breaking away from in hoop section of thick bamboo 8.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An electrochemical sensor comprising an electrode module, an electrolyte module, a housing (1) and a controller; the electrode module and the electrolyte module are respectively installed at two ends of the shell (1), the shell (1) is further provided with an air chamber (2) at the outer side of the electrolyte module, the shell (1) is further provided with a breathable film (3) at the top end of the air chamber (2), and the breathable film (3) is used for screening gas molecules entering the air chamber (2); the method is characterized in that: the air chamber (2) penetrates through the shell (1), and the caliber of the air chamber (2) in the shell (1) is gradually reduced from the end of the air-permeable membrane (3); the electrode modules and the electrolyte modules are distributed in the circumferential shell (1) of the air chamber (2) in a surrounding manner; the electrode module is also provided with pins (11) which are electrically connected towards the outer side of the shell (1), and further comprises an indicating electrode (4), a counter electrode (41) and a reference electrode (42); the indicating electrode (4) is close to the gas-permeable membrane (3); the counter electrode (41) and the reference electrode (42) are positioned at the end of the shell (1) far away from the gas-permeable membrane (3); the electrolyte module also comprises an electrolyte cavity (5), electrolyte solution is filled in the electrolyte cavity (5), an indicating electrode (4) which is electrically connected is arranged on the side wall of the electrolyte cavity (5) facing the gas chamber (2), and a counter electrode (41) and a reference electrode (42) which are electrically connected are arranged on the side wall of the electrolyte cavity (5) facing the shell (1); a pair of annular semiconductor refrigerating pieces (6) is arranged at the end part of the electrolyte cavity (5), and two ends of the electrolyte cavity (5) are respectively contacted with a cold source and a heat source of the semiconductor refrigerating pieces (6); the semiconductor refrigerating piece (6) is electrically connected with the pin (11), and a temperature sensor is also arranged in the position of the shell (1) where the semiconductor refrigerating piece (6) is positioned; the controller is configured to regulate operation of the electrochemical sensor.
2. An electrochemical sensor according to claim 1, wherein: the end part of the breathable film (3) of the shell (1) is also provided with an annular air bag (12), the air bag (12) is fixedly connected inside the shell (1) and is in contact with the semiconductor refrigerating sheet (6) at the top end of the electrolyte cavity (5), and the air bag (12) is expanded under the action of a heat source of the semiconductor refrigerating sheet (6); the shell (1) is sleeved on the outer side of the electrolyte cavity (5).
3. An electrochemical sensor according to claim 2, wherein: annular copper sheets (13) are further arranged at two ends of the shell (1) respectively, the copper sheets (13) extend to the outer wall of the shell from the end portion of the shell (1), one ends of the copper sheets (13) are in contact with the surface, facing the electrolyte cavity (5), of the semiconductor refrigeration sheet (6), and the other ends of the copper sheets (13) are in contact with the end face, in the air chamber (2), of the indication electrodes (4).
4. An electrochemical sensor according to claim 1, wherein: the inner wall of the breathable film (3) is also provided with a rubber cover (7), and the breathable film (3) protrudes towards the outer side of the shell (1); the rubber cover (7) is umbrella-shaped and is fixedly adhered to the center of the breathable film (3), and the diameter of the rubber cover (7) is the same as the minimum diameter of the air chamber (2) at the bottom of the shell (1).
5. An electrochemical sensor according to claim 4, wherein: a conical hoop cylinder (8) is further arranged below the rubber cover (7), the top of the hoop cylinder (8) wraps the outer side of the edge of the bottom end of the rubber cover (7), and the bottom of the hoop cylinder (8) is flush with the bottom surface of the electrolyte cavity (5); the bottom of the rubber cover (7) is also provided with a surrounding wedge groove (71), the wedge groove (71) is inclined to the axial direction of the rubber cover (7), and the bottom of the rubber cover (7) is in an overlapped state when being pressed.
6. An electrochemical sensor according to claim 5, wherein: a supporting plate (9) is further arranged below the hoop barrel (8), and a spring (81) is fixedly connected between the hoop barrel (8) and the supporting plate (9); and two ends of the supporting plate (9) are fixed on the bottom surface of the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481541.0A CN113418973A (en) | 2021-04-30 | 2021-04-30 | Electrochemical sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110481541.0A CN113418973A (en) | 2021-04-30 | 2021-04-30 | Electrochemical sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113418973A true CN113418973A (en) | 2021-09-21 |
Family
ID=77712017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110481541.0A Pending CN113418973A (en) | 2021-04-30 | 2021-04-30 | Electrochemical sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418973A (en) |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB169548A (en) * | 1920-07-08 | 1921-10-06 | William John Rickets | Improvements in electrical systems and apparatus for inducing chemical action |
| GB227431A (en) * | 1924-06-16 | 1926-04-23 | Bertram Gray | Improvements in liquid rheostats |
| CH368644A (en) * | 1960-08-30 | 1963-04-15 | Ernest Dr Carritt Dayton | Apparatus for determining the content of reducible gas dissolved in a solution and method for activating this apparatus |
| US5284566A (en) * | 1993-01-04 | 1994-02-08 | Bacharach, Inc. | Electrochemical gas sensor with wraparound reference electrode |
| US5336390A (en) * | 1992-09-26 | 1994-08-09 | Dragerwerk Ag | Electrochemical gas sensor with disk-shaped electrodes, which are also electrical contact leads |
| US20050145330A1 (en) * | 2003-12-24 | 2005-07-07 | Gary Shubinsky | Transmission laser welding of electro-chemical sensors |
| US20060144700A1 (en) * | 2003-06-10 | 2006-07-06 | The C & M Group, Llc | Apparatus and process for mediated electrochemical oxidation of materials |
| CN101156063A (en) * | 2005-02-15 | 2008-04-02 | 珀金埃尔默Las公司 | Method and apparatus for providing an electrochemical sensor at an adjustable temperature |
| WO2010023067A1 (en) * | 2008-08-25 | 2010-03-04 | Endress+Hauser Conducta Gesellschaft Für Mess- Und Regeltechnik Mbh+Co. Kg | Electrochemical sensor |
| CN101806765A (en) * | 2010-03-05 | 2010-08-18 | 郑州炜盛电子科技有限公司 | Intelligent temperature-controlled electrochemical gas detector |
| FR2950740A1 (en) * | 2009-09-25 | 2011-04-01 | Michelin Soc Tech | ELECTROCHEMICAL REACTOR, SUCH AS A FUEL CELL OR ELECTROLYSER, EQUIPPED WITH A DEVICE FOR MEASURING THE CONCENTRATION IN A GAS OF ONE OF THE SPECIFIC GASES OF THE OPERATION OF SAID REACTOR |
| US20110308947A1 (en) * | 2008-12-22 | 2011-12-22 | Endress+Hauser Conducta Gesellschaft Fur Mess-Und Regeltechnik Mbh + Co. Kg | Reference electrode |
| KR20140024993A (en) * | 2012-08-20 | 2014-03-04 | (주)센텍코리아 | Electrochemical gas sensor |
| CN105319062A (en) * | 2014-06-24 | 2016-02-10 | 杭州新松机器人自动化有限公司 | ABS gear ring detection device |
| CN205027694U (en) * | 2015-10-20 | 2016-02-10 | 重庆特瑞尔分析仪器有限公司 | Invariable low temperature electrochemistry oxygen analysis appearance |
| CN205374362U (en) * | 2016-01-11 | 2016-07-06 | 北京安赛克科技有限公司 | Electro -chemical sensor |
| DE102016107889A1 (en) * | 2016-04-28 | 2017-11-02 | Endress+Hauser Conducta Gmbh+Co. Kg | Electrochemical sensor with display element |
| CN110031516A (en) * | 2019-03-29 | 2019-07-19 | 福建师范大学 | A kind of three electrode original position X-ray electrolytic cell devices that reaction environment is controllable |
| CN110146557A (en) * | 2019-06-10 | 2019-08-20 | 姜超 | A kind of damping type humidity sensor |
| CN211426411U (en) * | 2019-09-06 | 2020-09-04 | 青岛君康检测评价有限公司 | Detection apparatus for formaldehyde in indoor air |
| KR20200114126A (en) * | 2019-03-27 | 2020-10-07 | 주식회사 신우전자 | Micro electrochemical gas sensor |
| CN211955299U (en) * | 2020-01-15 | 2020-11-17 | 深圳市美克森电子有限公司 | Solid electrolyte electrochemical gas sensor |
-
2021
- 2021-04-30 CN CN202110481541.0A patent/CN113418973A/en active Pending
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB169548A (en) * | 1920-07-08 | 1921-10-06 | William John Rickets | Improvements in electrical systems and apparatus for inducing chemical action |
| GB227431A (en) * | 1924-06-16 | 1926-04-23 | Bertram Gray | Improvements in liquid rheostats |
| CH368644A (en) * | 1960-08-30 | 1963-04-15 | Ernest Dr Carritt Dayton | Apparatus for determining the content of reducible gas dissolved in a solution and method for activating this apparatus |
| US5336390A (en) * | 1992-09-26 | 1994-08-09 | Dragerwerk Ag | Electrochemical gas sensor with disk-shaped electrodes, which are also electrical contact leads |
| US5284566A (en) * | 1993-01-04 | 1994-02-08 | Bacharach, Inc. | Electrochemical gas sensor with wraparound reference electrode |
| US20060144700A1 (en) * | 2003-06-10 | 2006-07-06 | The C & M Group, Llc | Apparatus and process for mediated electrochemical oxidation of materials |
| US20050145330A1 (en) * | 2003-12-24 | 2005-07-07 | Gary Shubinsky | Transmission laser welding of electro-chemical sensors |
| CN101156063A (en) * | 2005-02-15 | 2008-04-02 | 珀金埃尔默Las公司 | Method and apparatus for providing an electrochemical sensor at an adjustable temperature |
| WO2010023067A1 (en) * | 2008-08-25 | 2010-03-04 | Endress+Hauser Conducta Gesellschaft Für Mess- Und Regeltechnik Mbh+Co. Kg | Electrochemical sensor |
| US20110308947A1 (en) * | 2008-12-22 | 2011-12-22 | Endress+Hauser Conducta Gesellschaft Fur Mess-Und Regeltechnik Mbh + Co. Kg | Reference electrode |
| FR2950740A1 (en) * | 2009-09-25 | 2011-04-01 | Michelin Soc Tech | ELECTROCHEMICAL REACTOR, SUCH AS A FUEL CELL OR ELECTROLYSER, EQUIPPED WITH A DEVICE FOR MEASURING THE CONCENTRATION IN A GAS OF ONE OF THE SPECIFIC GASES OF THE OPERATION OF SAID REACTOR |
| CN101806765A (en) * | 2010-03-05 | 2010-08-18 | 郑州炜盛电子科技有限公司 | Intelligent temperature-controlled electrochemical gas detector |
| KR20140024993A (en) * | 2012-08-20 | 2014-03-04 | (주)센텍코리아 | Electrochemical gas sensor |
| CN105319062A (en) * | 2014-06-24 | 2016-02-10 | 杭州新松机器人自动化有限公司 | ABS gear ring detection device |
| CN205027694U (en) * | 2015-10-20 | 2016-02-10 | 重庆特瑞尔分析仪器有限公司 | Invariable low temperature electrochemistry oxygen analysis appearance |
| CN205374362U (en) * | 2016-01-11 | 2016-07-06 | 北京安赛克科技有限公司 | Electro -chemical sensor |
| DE102016107889A1 (en) * | 2016-04-28 | 2017-11-02 | Endress+Hauser Conducta Gmbh+Co. Kg | Electrochemical sensor with display element |
| KR20200114126A (en) * | 2019-03-27 | 2020-10-07 | 주식회사 신우전자 | Micro electrochemical gas sensor |
| CN110031516A (en) * | 2019-03-29 | 2019-07-19 | 福建师范大学 | A kind of three electrode original position X-ray electrolytic cell devices that reaction environment is controllable |
| CN110146557A (en) * | 2019-06-10 | 2019-08-20 | 姜超 | A kind of damping type humidity sensor |
| CN211426411U (en) * | 2019-09-06 | 2020-09-04 | 青岛君康检测评价有限公司 | Detection apparatus for formaldehyde in indoor air |
| CN211955299U (en) * | 2020-01-15 | 2020-11-17 | 深圳市美克森电子有限公司 | Solid electrolyte electrochemical gas sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2825692C (en) | Alcohol-measuring device with fast operational readiness | |
| CN1865969A (en) | Gas sensor, gas detector, and self-testing and self-correcting method therefor | |
| JP4910477B2 (en) | Hydrogen sensor | |
| JP2004512216A (en) | Tire pressure monitoring system with low current consumption | |
| JP6077749B2 (en) | Vented oxygen battery | |
| US7269993B2 (en) | Gas detecting apparatus, gas detecting method and fuel cell vehicle | |
| CN113418973A (en) | Electrochemical sensor | |
| JP2582227B2 (en) | Electrochemical measuring cell with gas permeable casing | |
| CN2914069Y (en) | Tester of intercrystalline corrosion | |
| JP2007248462A (en) | Liquid level detector, and method therefor | |
| CN211013024U (en) | Waterproof environmental monitor | |
| CN205506746U (en) | Utensil anti -jamming electrochemistry formaldehyde sensor | |
| CN100495012C (en) | Oxygen sensor | |
| CN103926299A (en) | Gas sensor | |
| CN110006584A (en) | A kind of high-temperature-resistance pressure sensor | |
| CN106114084B (en) | Active and standby formula twins pressure sensor | |
| JP2004511796A (en) | Pressure sensor module | |
| CN215984672U (en) | Layout-compact air detection sensor | |
| CN215865623U (en) | Pressure sensor | |
| CN114965648B (en) | Oxygen sensor | |
| CN220170931U (en) | Oxygen sensor suitable for temperature suddenly changes | |
| CN212275409U (en) | Pressure detection device in battery safety test process | |
| CN218003673U (en) | Battery detection device | |
| CN216012613U (en) | Nitrogen cylinder air valve leakage alarm device | |
| CN216434101U (en) | Water resource pH value testing arrangement |
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 |