CN108776159A - A kind of novel high polymer impedance type humidity sensor - Google Patents
A kind of novel high polymer impedance type humidity sensor Download PDFInfo
- Publication number
- CN108776159A CN108776159A CN201810983575.8A CN201810983575A CN108776159A CN 108776159 A CN108776159 A CN 108776159A CN 201810983575 A CN201810983575 A CN 201810983575A CN 108776159 A CN108776159 A CN 108776159A
- Authority
- CN
- China
- Prior art keywords
- substrate
- electrode
- groups
- comb electrodes
- high polymer
- 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
- 229920000642 polymer Polymers 0.000 title claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 30
- 230000001953 sensory effect Effects 0.000 claims abstract description 17
- 239000012528 membrane Substances 0.000 claims abstract description 14
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 229940059939 kayexalate Drugs 0.000 claims description 6
- 229920001467 poly(styrenesulfonates) Polymers 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000006748 scratching Methods 0.000 abstract description 3
- 230000002393 scratching effect Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
-
- 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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The present invention discloses a kind of novel high polymer impedance type humidity sensor, including shell, and the enclosure interior is equipped with substrate, electrode and wet sensory material, multiple shrinkage pools are evenly distributed on the substrate；The electrode is set on substrate, and the wet sensory material is coated on substrate and electrode, forms humidity-sensitive film after drying；Re-coating has one layer of waterproof and breathable membrane material on the humidity-sensitive film；The electrode includes two groups of comb electrodes of cross-cutting distribution, and the distance between center line of two groups of comb electrodes is not less than 1mm；Two groups of comb electrodes include cross one another at least 3 pairs interdigital.The present invention uses the substrate of more shrinkage pool structures, enhances the binding ability of wet sensory material and substrate, and applied on surface and be covered with waterproof ventilated membrane material, improves element stability and resistance to high humidity, water resistance；And sensor element is set to the ABS plastic enclosure interior that several openings are distributed in front, it prevents from scratching or polluting polymeric membrane.
Description
Technical field
The present invention relates to sensor field, especially a kind of novel high polymer impedance type humidity sensor.
Background technology
Novel high polymer impedance type humidity sensor is one kind of humidity sensor, is usually used in test moisture in air and contains
Amount.Recently as the development and the improvement of people's living standards of technology, start to be widely used in all trades and professions.Wherein utilize height
The field that sensor is current awfully hot door is made in molecule humidity-sensitive material, and resistor-type high molecule humidity sensor is answered at present
With especially prevalent, using high molecular material under different humidity environment, resistance difference caused by the moisture difference of absorption is used for
Detect the moisture in air.
Humidity sensing polymer materials for resistance type humidity sensor are generally containing some macromolecules such as quaternary ammonium salt, sulfonate
Electrolyte, it is simple for process, be easy to batch production and it is cheap, but because salts substances under high temperature and humidity be easy decompose
It is lost in, often associativity is poor when being coated on substrate, causes the stability of element not high, and water resistance is poor, in moisture condensation state
Under, it is prone to drift in；And the dew cell of existing humidity sensor is usually exposed on the external completely, can inevitably be sent out when installing or carrying
Stiff object or finger are in direct contact element surface, the case where scratching or pollute polymeric membrane, easily damage sensor.
Invention content
In order to overcome the disadvantages mentioned above of the prior art, the object of the present invention is to provide a kind of novel high polymer impedance type humidity
Sensor uses the substrate of more shrinkage pool structures, enhances the binding ability of wet sensory material and substrate, and saturating in surface coating waterproof
Air film material improves element stability and resistance to high humidity, water resistance；Meanwhile between the center line of two groups of comb electrodes
Distance is not less than 1mm, and ageing-resistant performance is good；And by the way that sensor element is set to the ABS plastic that several openings are distributed in front
Enclosure interior, avoids hard object or finger is in direct contact sensor element surface, to prevent from scratching or pollute polymeric membrane, prevents
Dirt effect is good.
The technical solution adopted by the present invention to solve the technical problems is：A kind of novel high polymer impedance type humidity sensor
Device, including shell, the enclosure interior are equipped with substrate, electrode and wet sensory material, multiple shrinkage pools are evenly distributed on the substrate,
Substrate advantageously reduces element impedance using more shrinkage pool structures, enhances the binding ability of wet sensory material and substrate, to improve member
Part stability；The electrode is set on substrate, and the wet sensory material is coated on substrate and electrode, and it is wet to form sense after drying
Film；Re-coating has one layer of waterproof and breathable membrane material on the humidity-sensitive film；The electrode includes two groups of pectinations of cross-cutting distribution
Electrode, the distance between center line of two groups of comb electrodes are not less than 1mm；Two groups of comb electrodes include intersecting
At least 3 pairs it is interdigital, and it is adjacent it is the distance between interdigital be 0.2~0.8mm；The bottom end of two groups of comb electrodes is respectively connected with
Pin, the pin extend except shell；Several openings are distributed in the shell front.
As a further improvement on the present invention：Several be arranged concentrically and opening annular in shape is distributed in the shell front.
Another as the present invention improves：The shell front is equipped with several circular holes of array distribution.
As a further improvement on the present invention：The substrate is equipped with and the matched groove of electrode, two groups of pectinations
Electrode is embedded in groove.
As a further improvement on the present invention：The substrate is alumina ceramic substrate, and two groups of comb electrodes are carbon
Electrode；The shell is ABS plastic shell.
As a further improvement on the present invention：The wet sensory material is kayexalate and styrene-maleic anhydride
The polymeric membrane that copolymer sodium salt is compounded to form, it is known that styrene-copolymer-maleic anhydride sodium salt has response fast, and humidity hysteresis is small
The characteristics of, it is compound with kayexalate, the dew cell that high sensitivity, humidity hysteresis are small, humidity sensing range is wide can be made.
Preferably, the height of the shell is 12~20mm, and width is 10~15mm, and thickness is 4~8mm；The shell
Height be 17mm, width 14mm, thickness 6mm.
Preferably, the pin is metal pins, and the entire length of the pin is no less than 7mm.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of novel high polymer impedance type humidity sensor uses the substrate of more shrinkage pool structures, advantageously reduces element
Impedance enhances the binding ability of wet sensory material and substrate, to improve element stability；On the basis of wet sensory material, coating one
Layer waterproof and breathable membrane material, efficiently solves situation unstable under novel high polymer impedance type humidity sensor high humidity environment,
Improve the reliability and stability of product.
Meanwhile the distance between center line of two groups of comb electrodes is not less than 1mm, ensures ageing-resistant performance, uses
Longer life expectancy；Use the polymeric membrane that kayexalate and styrene-copolymer-maleic anhydride sodium salt are compounded to form for sense
Wet stock, high sensitivity, humidity hysteresis are small, humidity sensing range is wide；
The present invention was both allowed by the way that sensor element is set to the ABS plastic enclosure interior that several openings are distributed in front
Extraneous gas enters sensor measurement humidity, in turn avoids hard object or finger is in direct contact sensor element surface, to prevent
It scratches or pollution polymeric membrane, good dustproof effect, contamination resistance is strong.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of the present invention.
Fig. 2 is the external structure schematic diagram of the embodiment of the present invention one.
Fig. 3 is the external structure schematic diagram of the embodiment of the present invention two.
Specific implementation mode
In conjunction with description of the drawings, the present invention is further described with embodiment：
Embodiment one：Please refer to Fig.1-2, a kind of novel high polymer impedance type humidity sensor, including shell 1, the shell
Body is internally provided with substrate 2, electrode 3 and wet sensory material 4, multiple shrinkage pools 21 is evenly distributed on the substrate 2, substrate 2 is using more
Shrinkage pool structure advantageously reduces element impedance, enhances the binding ability of wet sensory material and substrate, to improve element stability.
The electrode 3 is set on substrate 2, and the wet sensory material 4 is coated on substrate 2 and electrode 3, forms sense after drying
Wet film；Re-coating has one layer of waterproof and breathable membrane material on the humidity-sensitive film；The electrode 3 includes two groups of combs of cross-cutting distribution
Shape electrode, the distance between center line of two groups of comb electrodes are 2mm；Two groups of comb electrodes include cross one another
At least 3 pairs are interdigital, and it is adjacent it is the distance between interdigital be 0.5mm, spacing is smaller, and the sensitivity of sensor and response speed are got over
It is high；The bottom end of two groups of comb electrodes is respectively connected with pin, and the pin extends except shell.
In the present embodiment, several be arranged concentrically and opening 11 annular in shape is distributed in 1 front of the shell.
One kind preferably, the substrate are equipped with and the matched groove of electrode, two groups of pectinations
Electrode is embedded in groove.
In the present embodiment, the height of the shell is 17mm, width 14mm, thickness 6mm.
The pin is brass pin, and the entire length of the pin is 8mm.
Embodiment two：Referring to Fig. 3, a kind of novel high polymer impedance type humidity sensor, including shell 100, the shell
Body is internally provided with substrate, electrode and wet sensory material；Multiple shrinkage pools are evenly distributed on the substrate, the electrode is set to substrate
On, the wet sensory material is coated on substrate and electrode, forms humidity-sensitive film after drying；Re-coating has one layer on the humidity-sensitive film
Waterproof and breathable membrane material；The electrode includes two groups of comb electrodes of cross-cutting distribution, the bottom end of two groups of comb electrodes
It is respectively connected with pin, the pin extends except shell.
The present embodiment and one technical solution of embodiment the difference is that：If the shell front is equipped with array distribution
Dry circular hole 101.
The substrate is alumina ceramic substrate, and two groups of comb electrodes are carbon electrode；The shell is ABS plastic shell
Body.The wet sensory material is the macromolecule that kayexalate and styrene-copolymer-maleic anhydride sodium salt are compounded to form
Film, it is known that styrene-copolymer-maleic anhydride sodium salt has response soon, and the small feature of humidity hysteresis is multiple with kayexalate
It closes, the dew cell that high sensitivity, humidity hysteresis are small, humidity sensing range is wide can be made.
In conclusion after those skilled in the art read file of the present invention, according to the technique and scheme of the present invention with
Technical concept is not necessarily to creative mental labour and makes other various corresponding conversion schemes, belongs to the model that the present invention is protected
It encloses.
Claims (6)
1. a kind of novel high polymer impedance type humidity sensor, including shell, it is characterised in that：The enclosure interior is equipped with base
Piece, electrode and wet sensory material are evenly distributed with multiple shrinkage pools on the substrate；The electrode is set on substrate, the sense moist wood
Material is coated on substrate and electrode, forms humidity-sensitive film after drying；Re-coating has one layer of waterproof and breathable membrane material on the humidity-sensitive film
Material；The electrode includes two groups of comb electrodes of cross-cutting distribution, the distance between the center line of two groups of comb electrodes
Not less than 1mm；Two groups of comb electrodes include cross one another at least 3 pairs interdigital, and it is adjacent it is the distance between interdigital be 0.2
~0.8mm；The bottom end of two groups of comb electrodes is respectively connected with pin, and the pin extends except shell；The shell is just
EDS maps have several openings.
2. a kind of novel high polymer impedance type humidity sensor according to claim 1, it is characterised in that：The shell is just
EDS maps have several be arranged concentrically and opening annular in shape.
3. a kind of novel high polymer impedance type humidity sensor according to claim 1, it is characterised in that：The shell is just
Face is equipped with several circular holes of array distribution.
4. a kind of novel high polymer impedance type humidity sensor according to claim 1, it is characterised in that：On the substrate
Equipped with the matched groove of electrode, in two groups of comb electrodes insertion groove.
5. according to a kind of novel high polymer impedance type humidity sensor of claim 1-4 any one of them, it is characterised in that：Institute
It is alumina ceramic substrate to state substrate, and two groups of comb electrodes are carbon electrode；The shell is ABS plastic shell.
6. a kind of novel high polymer impedance type humidity sensor according to claim 5, it is characterised in that：The sense moist wood
Material is the polymeric membrane that kayexalate salt and styrene-copolymer-maleic anhydride sodium salt are compounded to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983575.8A CN108776159A (en) | 2018-08-27 | 2018-08-27 | A kind of novel high polymer impedance type humidity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983575.8A CN108776159A (en) | 2018-08-27 | 2018-08-27 | A kind of novel high polymer impedance type humidity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108776159A true CN108776159A (en) | 2018-11-09 |
Family
ID=64029113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810983575.8A Pending CN108776159A (en) | 2018-08-27 | 2018-08-27 | A kind of novel high polymer impedance type humidity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108776159A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109717514A (en) * | 2019-01-16 | 2019-05-07 | 广东思泉新材料股份有限公司 | A kind of electronic cigarette and its processing method |
| CN113514508A (en) * | 2020-04-10 | 2021-10-19 | 北京中科银河芯科技有限公司 | Humidity sensor and humidity detection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2543063Y (en) * | 2002-05-24 | 2003-04-02 | 杨慕杰 | Composite high polymer resistance film humidity-sensitive element |
| CN203011877U (en) * | 2012-09-27 | 2013-06-19 | 中国石油大学(华东) | Graphene thin film humidity sensor |
| CN105784788A (en) * | 2016-05-09 | 2016-07-20 | 吉林大学 | Paper-based flexible humidity sensitive element and preparation method thereof |
| CN206057233U (en) * | 2015-11-19 | 2017-03-29 | 上海顺鸣实业有限公司 | A kind of humidity sensor |
| CN106896141A (en) * | 2017-03-22 | 2017-06-27 | 吉林大学 | A kind of impedance type dew cell based on the polymer-modified silicon dioxide granule of solution processable and preparation method thereof |
| CN108195888A (en) * | 2017-12-27 | 2018-06-22 | 长春理工大学 | Impedance type dew cell using the compound wet sensory material of cross-linked polymer and preparation method thereof |
| CN209117618U (en) * | 2018-08-27 | 2019-07-16 | 广州西博臣科技有限公司 | A kind of novel high polymer impedance type humidity sensor |
-
2018
- 2018-08-27 CN CN201810983575.8A patent/CN108776159A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2543063Y (en) * | 2002-05-24 | 2003-04-02 | 杨慕杰 | Composite high polymer resistance film humidity-sensitive element |
| CN203011877U (en) * | 2012-09-27 | 2013-06-19 | 中国石油大学(华东) | Graphene thin film humidity sensor |
| CN206057233U (en) * | 2015-11-19 | 2017-03-29 | 上海顺鸣实业有限公司 | A kind of humidity sensor |
| CN105784788A (en) * | 2016-05-09 | 2016-07-20 | 吉林大学 | Paper-based flexible humidity sensitive element and preparation method thereof |
| CN106896141A (en) * | 2017-03-22 | 2017-06-27 | 吉林大学 | A kind of impedance type dew cell based on the polymer-modified silicon dioxide granule of solution processable and preparation method thereof |
| CN108195888A (en) * | 2017-12-27 | 2018-06-22 | 长春理工大学 | Impedance type dew cell using the compound wet sensory material of cross-linked polymer and preparation method thereof |
| CN209117618U (en) * | 2018-08-27 | 2019-07-16 | 广州西博臣科技有限公司 | A kind of novel high polymer impedance type humidity sensor |
Non-Patent Citations (2)
| Title |
|---|
| 刘若望 等: "苯乙烯-马来酸酐交替共聚物钠盐/聚苯乙烯磺酸钠复合物的湿敏特性", 传感技术学报, vol. 24, no. 04, pages 487 - 491 * |
| 刘若望: "高分子电阻型薄膜湿度传感器——元件构造、老化机理、感湿机理探讨", 中国优秀博硕士学位论文全文数据库（硕士） 信息科技辑, no. 2, 15 December 2002 (2002-12-15), pages 33 - 36 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109717514A (en) * | 2019-01-16 | 2019-05-07 | 广东思泉新材料股份有限公司 | A kind of electronic cigarette and its processing method |
| CN113514508A (en) * | 2020-04-10 | 2021-10-19 | 北京中科银河芯科技有限公司 | Humidity sensor and humidity detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2005081653A3 (en) | Techniques for sensing chloride ions in wet or dry media | |
| TWI314989B (en) | Humidity sensor having temperature compensation self-comparing and manufacturing method therefore | |
| CN108776159A (en) | A kind of novel high polymer impedance type humidity sensor | |
| EP1125115B1 (en) | Dew point hygrometers and dew sensors | |
| Li et al. | A humidity sensor based on interpenetrating polymer network prepared from poly (dimethylaminoethyl methacrylate) and poly (glycidyl methacrylate) | |
| US4520341A (en) | Moisture responsive element with crosslinked organic membrane and protective layering | |
| EP1139092A3 (en) | Humidity sensor and method for making | |
| CN209117618U (en) | A kind of novel high polymer impedance type humidity sensor | |
| CN206601357U (en) | A kind of flexible capacitance type humidity sensor | |
| WO2007070481A3 (en) | Humidity sensor | |
| US20050194252A1 (en) | Electrochemical sensor having nonporous working electrode | |
| Shoukry et al. | Plastic Membrane Selective Electrode for Cetirizinium Ion Based on Cetirizinium‐Tetraphenylborate Ion‐Pair | |
| JPS589056A (en) | Moisture sensitive resistance element | |
| CN206848203U (en) | A kind of condensation sensor applied under conditions of high humidity | |
| US4199411A (en) | Halide ion-selective devices and methods of determining halides | |
| CN208443744U (en) | A kind of formaldehyde detecting box | |
| JPS5967445A (en) | Humidity sensor | |
| CN201096744Y (en) | A polymer graft carbon black compound resistance film humidity sensitive part | |
| CN209148042U (en) | A kind of Hygrothermograph | |
| KR910004110B1 (en) | Dew senser and its manufacturing method | |
| JPS589055A (en) | Moisture sensitive resistance element | |
| CN115931984A (en) | Paper-based humidity sensor and printing preparation method | |
| JPS5990038A (en) | Moisture sensitive material | |
| JPH03195963A (en) | Electrochemical gas sensor element | |
| JPS6197558A (en) | Moisture-sensitive element |
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 |