CN213689455U - Portable atmosphere O3 electrochemistry monitoring devices - Google Patents
Portable atmosphere O3 electrochemistry monitoring devices Download PDFInfo
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- CN213689455U CN213689455U CN202022687253.4U CN202022687253U CN213689455U CN 213689455 U CN213689455 U CN 213689455U CN 202022687253 U CN202022687253 U CN 202022687253U CN 213689455 U CN213689455 U CN 213689455U
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- 230000005518 electrochemistry Effects 0.000 title 1
- 238000012545 processing Methods 0.000 claims abstract description 43
- 238000012544 monitoring process Methods 0.000 claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 17
- 230000003750 conditioning effect Effects 0.000 claims description 40
- 238000000605 extraction Methods 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 35
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VGQXTTSVLMQFHM-UHFFFAOYSA-N peroxyacetyl nitrate Chemical compound CC(=O)OO[N+]([O-])=O VGQXTTSVLMQFHM-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 210000003437 trachea Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- CSMWJXBSXGUPGY-UHFFFAOYSA-L sodium dithionate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)S([O-])(=O)=O CSMWJXBSXGUPGY-UHFFFAOYSA-L 0.000 description 1
- 229940075931 sodium dithionate Drugs 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
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Abstract
The utility model relates to a portable atmosphere O3The electrochemical monitoring device comprises an atmosphere acquisition module, a gas monitoring processing module, a data processing module, a communication module, a LabVIEW monitoring module and a DC power supply module; the gas monitoring processing module comprises a gas chamber and an OXElectrochemical sensor, NO2The gas chamber is connected with the atmosphere acquisition module through a pipeline, so that the atmosphere acquisition module conveys gas into the gas chamber; the temperature and humidity sensor is arranged in the inner cavity of the air chamber and used for monitoring the temperature and humidity change of the air in the air chamber, and the temperature sensor is used for sensing the temperature and humidityThe device is electrically connected with the data processing module; o isXElectrochemical sensor and NO2The electrochemical sensors are all arranged on the air chamber, OXElectrochemical sensor for detecting O in atmosphere3And NO2Total concentration of (3), NO2Electrochemical sensor for detecting NO in atmosphere2The concentration can adapt to more severe measuring environments, the measuring precision is high, and NO in the atmosphere can be measured simultaneously3And O3Is measured.
Description
Technical Field
The utility model belongs to the technical field of atmospheric environment monitoring device, concretely relates to portable atmosphere O3An electrochemical monitoring device.
Background
The photochemical smog is VOCs and NO emitted by automobile exhaust, industrial waste gas and the like2Under the irradiation of strong sunlight and ultraviolet rays, secondary pollutants such as ozone and peroxyacetyl nitrate (PAN) with high concentration are formed, thereby causing atmospheric pollution. At present, the phenomenon of ozone pollution in China is common: in 2006-2011, the ozone concentration in the bead triangle area rises by 21 percent and becomes the only rising index of atmospheric pollutants; in 2013, the ozone pollution is mainly used in the bead triangle area for half a year, and the proportion of the overproof days from 5 months to 9 months and the ozone as the first pollutant is more than 98 percent; compared with the same period of 2014, the proportion of 74 cities reaching the standard days in summer in 2015 is reduced from 80.5% to 73.1%, and particularly in Guangdong province and Jiangsu province, the ozone replaces PM2.5 and becomes the air primary pollutant in the whole province; in 2016, 59 cities in the whole country have the maximum average concentration exceeding 8 hours of ozone days, and are mainly distributed in Jingjin Ji, Long triangle and other areas. Thus, the atmosphere O is monitored3Concentration pair for evaluating city air pollution degree and clarifying atmosphere O3The pollution reason and the targeted treatment control have important guiding significance.
Conventional measurement of atmospheric O3The methods mainly include ultraviolet absorption method, iodometry, indigo sodium dithionate spectrophotometry (IDS), etc. The ultraviolet absorption method has high instrument cost, and extinction caused by water vapor and particles can interfere with the ozone measurement result; the iodometry has the advantages of intuition, no need of expensive instruments and easy interference by other oxidants; IDS methods are complex to operate.
The principle of the constant potential electrolysis method is that a sensor is electrolyzed by constant potentialAnd (3) the gas content corresponds to the generated electric signal, and the strength of the electric signal is detected to realize the detection of the gas content. The portable and flexible electronic device has the advantages of low cost and portability. The portable electrochemical sensor manufactured by the method solves the problem that the existing large-scale detection equipment is inconvenient to carry, is convenient for large-scale stationing, and collects data in a large scale to perform data analysis and scientific research. Is suitable for atmosphere O3The research of field concentration detection, distribution monitoring and pollution source position determination.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model discloses a portable atmosphere O3The electrochemical monitoring device has the advantages of miniaturization and light weight, is portable and easy to operate, and can realize the function of remote monitoring.
The specific technical scheme is as follows:
portable atmosphere O3The electrochemical monitoring device comprises an atmosphere acquisition module, a gas monitoring processing module, a data processing module, a communication module, a LabVIEW monitoring module and a DC power supply module;
the atmosphere acquisition module acquires gas and transmits the gas to the gas monitoring and processing module;
the gas monitoring and processing module is used for detecting O in gas3Concentration, NO2The concentration and temperature and humidity data are converted into current signals and sent to the data processing module;
the data processing module is used for processing the obtained voltage signals and storing data;
the DC power supply module provides power for the data processing module;
the communication module is used for establishing communication between the data processing module and the LabVIEW monitoring module;
the LabVIEW monitoring module is used for monitoring concentration data, temperature and humidity data, stored data and extracted data in real time;
the gas monitoring and processing module is characterized by comprising a gas chamber and an OXElectrochemical sensor, NO2An electrochemical sensor, a temperature and humidity sensor, a first signal conditioning circuit and a second signal conditioning circuit,the air chamber is of a hollow cavity structure, an air inlet pipe and an air outlet pipe are symmetrically arranged at two ends of the air chamber respectively, and the air inlet pipe is connected with the atmosphere acquisition module through a pipeline so that the atmosphere acquisition module can convey air into the air chamber; the temperature and humidity sensor is arranged in the inner cavity of the air chamber and used for monitoring the temperature and humidity change of the air in the air chamber, and the temperature sensor is electrically connected with the data processing module; said O isXElectrochemical sensor and NO2The electrochemical sensors are all mounted on the air chamber, and OXThe electrochemical sensor is electrically connected with the signal conditioning circuit, NO2The electrochemical sensor is electrically connected with the signal conditioning circuit II, OXElectrochemical sensor for detecting O in atmosphere3And NO2In order to accurately quantify O3By using NO2Electrochemical sensor for detecting NO in atmosphere2The concentration is corrected and compensated, converted into a current signal in direct proportion to the concentration of the gas to be measured, and respectively transmitted to the first signal conditioning circuit and the second signal conditioning circuit; the first signal conditioning circuit and the second signal conditioning circuit amplify the obtained current signals into appropriate voltage signals for processing by the data processing module, and the first signal conditioning circuit and the second signal conditioning circuit are both electrically connected with the data processing module.
Further, two mounting openings are formed in the top end of the air chamber, two mounting grooves of an annular structure are formed in the side wall of each mounting opening, fastening sleeves are arranged in the mounting grooves and are respectively sleeved with the fastening sleevesXOn electrochemical sensor and NO2On the electrochemical sensor, the adapter sleeve includes two semicircular hoops, two hoop one end is equipped with the hinged end and passes through the hinged end articulates, and the other end of two hoops is equipped with the joint end and passes through the joint end carries out the joint fixed, and mounting groove upper end symmetry has seted up a plurality of entries of inlaying for hinged end and joint end on the adapter sleeve pass through inlay the mouth and place in the mounting groove, and carry on spacingly through hinged end and joint end.
Furthermore, the outer wall of the fastening sleeve is symmetrically provided with limiting blocks.
Further, the tightening isThe inner wall of the fixed sleeve is provided with a plurality of anti-slip blocks, thereby preventing OXElectrochemical sensor and NO2The electrochemical sensor is activated.
Furthermore, the joint end is including the fixed column of fixed setting on two hoops respectively, and one of them fixed column bottom is equipped with the arch of arc structure, another fixed column top be equipped with the recess of protruding shape looks adaptation for when two hoops one end docks, protruding embedding carry out spacing fixedly in the recess.
Furthermore, the first signal conditioning circuit and the second signal conditioning circuit are respectively arranged in NO2Upper end of electrochemical sensor and OXThe upper end of the electrochemical sensor.
The beneficial effects of the utility model are embodied in:
(1) the utility model discloses simple structure, portable easy operation, and in the field can continuous stable operation, adaptable more abominable measuring environment, measurement accuracy is high, can be simultaneously to NO in the atmosphere3And O3Is measured.
(2) The utility model discloses two installing ports at the top of well air chamber are respectively through adapter sleeve to Ox electrochemical sensor and NO2The electrochemical sensor is fastened, and the fastening sleeve penetrates through the embedding opening and is placed in the mounting groove for limiting, so that the sensor is effectively prevented from falling off and the measuring effect is influenced.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a perspective view of the middle air chamber of the present invention.
Fig. 3 is a cross-sectional view of the middle air chamber of the present invention.
Fig. 4 is a schematic structural view of the middle fastening sleeve of the present invention.
Fig. 5 is a working principle diagram of the present invention.
Description of the reference numerals
Detailed Description
For making the technical scheme of the utility model clear more clearly and definitely, it is right to combine the drawing below the utility model discloses further describe, any is right the utility model discloses technical scheme's technical characteristic carries out the scheme that equivalent replacement and conventional reasoning reachs and all falls into the utility model discloses protection scope. The utility model discloses in the fixed connection who mentions, fixed setting is the general connected mode among the mechanical field, and welding, bolt and nut are connected and the screw connection is all can.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1-5, a portable atmosphere O3The electrochemical monitoring device comprises an atmosphere acquisition module 1, a gas monitoring processing module 2, a data processing module 3, a communication module 5, a LabVIEW monitoring module 6 and a DC power supply module 7;
the atmosphere acquisition module 1 acquires gas and transmits the gas to the gas monitoring and processing module 2; the atmosphere acquisition module 1 comprises an air pump 11, a rotor flow meter 12, a first air pipe 13 and a second air pipe 14, wherein the air outlet end of the air pump 11 is connected with the air inlet end of the rotor flow meter 12 through the first air pipe 13, and the air outlet end of the rotor flow meter 12 is connected with the gas monitoring module through the second air pipe 14;
the gas monitoring processing module 2 comprises a gas chamber 24, OX Electrochemical sensor 21, NO2The air chamber 24 is of a hollow cavity structure, two ends of the air chamber 24 are respectively and symmetrically provided with an air inlet pipe 241 and an air outlet pipe 242, and the air inlet pipe 241 is connected with the second air pipe 14 through a pipeline, so that the atmosphere acquisition module 1 conveys air into the air chamber 24; the temperature and humidity sensor 23 is arranged in the inner cavity of the air chamber 24 and used for monitoring the temperature and humidity change of the air in the air chamber 24, and the temperature sensor is electrically connected with the data processing module 3; said O isX Electrochemical sensor 21 and NO2The electrochemical sensors 22 are all mounted on the gas chamber 24, and OXThe electrochemical sensor 21 is electrically connected with the signal conditioning circuit I25, NO2The electrochemical sensor 22 is electrically connected with the second signal conditioning circuit 26, NO2 Electrochemical sensor 22 for detecting NO in the atmosphere2Concentration, Ox electrochemical sensor 21 for detecting NO in the atmosphere2And O3The total concentration is converted into a current signal proportional to the concentration of the gas to be measured, the Ox electrochemical sensor 21 and the NO2As the electrochemical sensor 22, OX-B431 and NO of Alphasense were used, respectively2-B43F four-electrode sensor with high-sensitivity four-electrode electrochemical sensor as O3And NO2The concentration sensing carrier is a signal conversion carrier by relying on a high signal-to-noise ratio conditioning circuit, the interference of zero current drift to measurement under trace concentration is compensated by using a differential algorithm, the four-electrode electrochemical sensor comprises a gas permeable membrane, a diaphragm, a working electrode, a reference electrode, a counter electrode, an auxiliary electrode and electrolyte, the gas permeable membrane is used for limiting the diffusion of gas, and the gas permeable membrane ensures that a proper amount of gas reaches the working electrode for reaction, so that the long-term electrochemical activity of the working electrode is maintained; the diaphragm plays roles of permeating gas, preventing electrolyte from leaking and resisting external water vapor from permeating due to the characteristics of porosity and strong hydrophobicity; the electrolyte provides an ion current transmission environment between the electrodes; target gas permeationThe sensor is used for generating reduction reaction on the working electrode to generate current in direct proportion to the gas concentration; the counter electrode reacts oppositely to the working electrode to generate balance current and form an electrochemical loop. The four-electrode sensor is provided with an auxiliary electrode, the auxiliary electrode can not contact with gas and generate extra current, and the baseline level is still kept, so that even if the zero point is shifted during relative calibration during detection, the current zero point shift, namely the auxiliary electrode signal, is only required to be subtracted from the working electrode signal, and the effective current signal after the zero point shift can be compensated, which is generated by the gas to be detected, so that the response time and the anti-interference characteristic of the sensor are improved by the correction. The signal conditioning circuit is mainly used for voltage stabilization and conditioning, the voltage stabilization is to ensure that the current supplied to the sensor is stable, the waveform pulsation is small, and the conditioning is to condition the current signal output by the sensor into an amplified voltage signal and transmit the amplified voltage signal to the data processing module 3.
The first signal conditioning circuit 25 and the second signal conditioning circuit 26 are respectively and fixedly arranged at OX Electrochemical sensor 21 and NO2The upper end of the electrochemical sensor 22.
The temperature and humidity sensor 23 mainly adopts a DHT11 module and is used for monitoring the temperature and humidity change of the gas in the gas chamber 24.
The data processing module 3 comprises a circuit box 32 and a DSP main control chip 31 arranged in the circuit box 32, the DSP main control chip 31 is respectively electrically connected with a first signal conditioning circuit 25, a second signal conditioning circuit 26 and a temperature and humidity sensor 23, the DSP main control chip 31 is used for processing obtained voltage signals and storing data, the DSP main control chip is a DSP32 floating point operation TMS320F28335 main control chip, the internal 12 AD sampling voltage signals are adopted, and O TMS is finally obtained through inversion calculation3The concentration and the resolution ratio are lower than 1ppb, and the data are processed and displayed on a display screen 33; the display screen 33 is installed on the circuit box 32, and the display screen 33 is electrically connected with the DSP main control chip 31 and used for displaying real-time data;
the storage module is arranged in the circuit box 32 and is electrically connected with the DSP main control chip 31, and the storage module is an SD card or a TF card;
the DC power supply module 7 is a USB power supply module to provide 3.3V power for the data processing module 3.
The communication module 5 is an LoRa wireless communication module 5, the LoRa wireless communication module 5 is used for remote communication between a lower computer and an upper computer, the LoRa wireless communication module 5 is communicated with the DSP main control chip 31 through an RS485 serial port and is connected with the LabVIEW monitoring module 6 through wireless communication, and the LoRa wireless communication module 5 is used for establishing communication between the monitoring device and the LabVIEW monitoring module 6;
the LabVIEW monitoring module 6 is used for monitoring concentration data, temperature and humidity data, storage data and extraction data in real time. Through testing, the whole circuit is stable in testing condition, feasible and effective in design, accurate in obtained concentration result, good in anti-interference performance, convenient to control and wide in application applicability.
The working principle is as follows:
(1) air is pumped to the rotor flow meter by the air pump, and the air is input into the air chamber after the flow rate is adjusted by the flow meter.
(2)O3And NO2A redox reaction occurs in the sensor and two sets of current data proportional to the concentration of the gas to be measured are output at the working electrode. Wherein NO2-B43F four electrode sensor output and NO2Concentration-proportional current data, OX-B431 four-electrode sensor output and NO2And O3Current data with total concentration proportional.
(3) The signal conditioning circuit converts the current signal output by the sensor into a voltage signal and amplifies the voltage signal, and then data are transmitted to the DSP central control board.
(4) The processor averages all data obtained within 10s, subtracts the measured average data from the calculated data items, and passes the data through a difference algorithm VWEC＝(VWEU-VWET)-nT(VAEU-VAET) Find VwecFinally according to the formula
Calculating to obtain NO2Concentration C1And NO2And O3Total concentration C2. Wherein, VweuIs the uncorrected working electrode output voltage, V, of the conditioning circuitwetIs the sum of the zero offset of the working electrode and the zero offset of the conditioning circuit, nTIs a temperature characteristic correction coefficient determined by the chemical characteristics of the internal structure of the sensor, and the value is related to the ambient temperature VaeuIs the uncorrected auxiliary electrode output voltage, VaetIs the sum of the zero offset of the auxiliary electrode and the zero offset of the conditioning circuit, VwecIs the corrected working electrode output voltage, and S is the sensor sensitivity (in mv/ppbv).
(5) Calculating C2-C1To obtain O3And the concentration is displayed on a display screen after being transmitted through the data line.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. Portable atmosphere O3The electrochemical monitoring device comprises an atmosphere acquisition module (1), a gas monitoring processing module (2), a data processing module (3), a communication module (5), a LabVIEW monitoring module (6) and a DC power supply module (7);
the atmosphere acquisition module (1) acquires gas and transmits the gas to the gas monitoring and processing module (2);
the gas monitoring and processing module (2) is used for detecting O in gas3Concentration, NO2The concentration and temperature and humidity data are converted into current signals and sent to the data processing module (3);
the data processing module (3) is used for processing the obtained voltage signals and storing data;
the DC power supply module (7) provides power for the data processing module (3);
the communication module (5) is used for establishing communication between the data processing module (3) and the LabVIEW monitoring module (6);
the LabVIEW monitoring module (6) is used for monitoring concentration data, temperature and humidity data, storage data and extraction data in real time;
characterized in that the gas monitoring processing module (2) comprises a gas chamber (24), OXElectrochemical sensor (21), NO2The air-conditioning system comprises an electrochemical sensor (22), a temperature and humidity sensor (23), a first signal conditioning circuit (25) and a second signal conditioning circuit (26), wherein the air chamber (24) is of a hollow cavity structure, two ends of the air chamber (24) are respectively and symmetrically provided with an air inlet pipe (241) and an air outlet pipe (242), and the air inlet pipe (241) is connected with an atmosphere acquisition module (1) through a pipeline, so that the atmosphere acquisition module (1) conveys air into the air chamber (24); the temperature and humidity sensor (23) is arranged in the inner cavity of the air chamber (24) and used for monitoring the temperature and humidity change of the air in the air chamber (24), and the temperature sensor is electrically connected with the data processing module (3); said O isXElectrochemical sensor (21) and NO2The electrochemical sensors (22) are all mounted on the air chamber (24), and OXThe electrochemical sensor (21) is electrically connected with the signal conditioning circuit I (25), NO2The electrochemical sensor (22) is electrically connected with the second signal conditioning circuit (26), OXAn electrochemical sensor (21) for detecting O in the atmosphere3And NO2In total concentration of (D), with NO2Electrochemical sensor (22) for detecting NO in the atmosphere2The concentration is converted into a current signal which is in direct proportion to the concentration of the gas to be measured, and the current signal is respectively transmitted to a signal conditioning circuit I (25) and a signal conditioning circuit II (26); the first signal conditioning circuit (25) and the second signal conditioning circuit (26) amplify the obtained current signals into voltage signals for processing by the data processing module (3), and the first signal conditioning circuit (25) and the second signal conditioning circuit (26) are both electrically connected with the data processing module (3).
2. A portable atmosphere O as claimed in claim 13The electrochemical monitoring device is characterized in that two mounting holes (243) are formed in the top end of the air chamber (24), mounting grooves (244) of annular structures are formed in the side walls of the two mounting holes (243), fastening sleeves (245) are arranged in the mounting grooves (244), and the two fastening sleeves (245) are respectively sleeved on the O-shaped holesXElectrochemical sensingOn device (21) and NO2On the electrochemical sensor (22), the fastening sleeve (245) comprises two semicircular hoops (2451), one end of each hoop (2451) is provided with a hinged end (2452) and hinged through the hinged end (2452), the other end of each hoop (2451) is provided with a clamping end (2453) and clamped and fixed through the clamping end (2453), and the upper end of the mounting groove (244) is symmetrically provided with a plurality of embedding openings (2441), so that the hinged end (2452) and the clamping end (2453) on the fastening sleeve (245) are placed in the mounting groove (244) through the embedding openings (2441), and are limited through the hinged end (2452) and the clamping end (2453).
3. A portable atmosphere O as claimed in claim 23The electrochemical monitoring device is characterized in that the outer wall of the fastening sleeve (245) is symmetrically provided with limit blocks (2458).
4. A portable atmosphere O as claimed in claim 23The electrochemical monitoring device is characterized in that a plurality of anti-skidding blocks (2457) are arranged on the inner wall of the fastening sleeve (245).
5. A portable atmosphere O as claimed in claim 23The electrochemical monitoring device is characterized in that the clamping end (2453) comprises fixing columns (2454) fixedly arranged on the two hoops (2451), respectively, wherein the bottom of one fixing column (2454) is provided with a bulge (2455) with an arc structure, and the top of the other fixing column (2454) is provided with a groove (2456) matched with the bulge (2455) in shape.
6. A portable atmosphere O as claimed in claim 13The electrochemical monitoring device is characterized in that the first signal conditioning circuit (25) and the second signal conditioning circuit (26) are respectively arranged on NO2Upper end of electrochemical sensor (22) and OXAn upper end of the electrochemical sensor (21).
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| CN202022687253.4U CN213689455U (en) | 2020-11-19 | 2020-11-19 | Portable atmosphere O3 electrochemistry monitoring devices |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114740158A (en) * | 2022-04-08 | 2022-07-12 | 天津光电华典科技有限公司 | Atmospheric gaseous pollutant detection module and detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114740158A (en) * | 2022-04-08 | 2022-07-12 | 天津光电华典科技有限公司 | Atmospheric gaseous pollutant detection module and detection device |
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