GB1422182A - Moisture sensing element and method of making same - Google Patents
Moisture sensing element and method of making sameInfo
- Publication number
- GB1422182A GB1422182A GB2519773A GB2519773A GB1422182A GB 1422182 A GB1422182 A GB 1422182A GB 2519773 A GB2519773 A GB 2519773A GB 2519773 A GB2519773 A GB 2519773A GB 1422182 A GB1422182 A GB 1422182A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- mixture
- atmosphere
- predetermined
- baking
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 abstract 5
- 238000001816 cooling Methods 0.000 abstract 2
- 238000007493 shaping process Methods 0.000 abstract 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract 1
- 230000032683 aging Effects 0.000 abstract 1
- 238000007605 air drying Methods 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical compound [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 abstract 1
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 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
-
- 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
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 Electric Means (AREA)
Abstract
1422182 Measuring moisture content electrically THUNDER SCIENTIFIC CORP 25 May 1973 25197/73 Heading G1N [Also in Division H1] A moisture sensing element comprises a pair of electrodes 12 embedded in spaced apart relationship in a crystal lattice 11 produced by baking a mixture of V 2 O 5 and Cr 2 O 3 and defining interstitial spaces between the electrodes, the interstitial spaces being such that molecules in an atmosphere being monitored drift randomly into and out of the spaces, the volumetric electrical resistance of the material between the electrodes thereby varying as a function of the per cent of water vapour in the atmosphere. The element is formed by mixing a one-to-one ratio by weight of Cr 2 O 3 and V 2 O 5 to form a paste, ageing the mixture for at least two weeks, shaping a predetermined quantity of the mixture, placing a pair of platinum-iridium electrodes a predetermined distance apart and overlapping by a predetermined distance on the shaped mixture, shaping the mixture around the electrodes as shown in Fig. 5b, air drying the element for at least 12 hours, baking the element in a furnace in the presence of Al 2 O 3 doping chips for a predetermined time at a predetermined temperature, cooling the element to a predetermined temperature, and further cooling the element to ambient temperature by quenching. A glass frit may be formed over a body portion of the element. In use the element is placed in circuit with a fixed resistor and an A.C. source, the voltage across the fixed resistor being a measure of the humidity of an atmosphere in which the element is placed, Fig. 9 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2519773A GB1422182A (en) | 1973-05-25 | 1973-05-25 | Moisture sensing element and method of making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2519773A GB1422182A (en) | 1973-05-25 | 1973-05-25 | Moisture sensing element and method of making same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1422182A true GB1422182A (en) | 1976-01-21 |
Family
ID=10223809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2519773A Expired GB1422182A (en) | 1973-05-25 | 1973-05-25 | Moisture sensing element and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1422182A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0013022A1 (en) * | 1978-12-26 | 1980-07-09 | Matsushita Electric Industrial Co., Ltd. | Humidity detecting apparatus using a humidity detecting resistor ceramic element |
| EP0045950A3 (en) * | 1980-08-08 | 1983-06-29 | Kabushiki Kaisha Toshiba | Moisture sensitive element |
| EP0123385A1 (en) * | 1983-02-24 | 1984-10-31 | Kabushiki Kaisha Toshiba | Humidity-sensitive resistive element |
| EP0247313A3 (en) * | 1986-04-16 | 1990-01-31 | Robert Bosch Gmbh | Humidity sensor |
-
1973
- 1973-05-25 GB GB2519773A patent/GB1422182A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0013022A1 (en) * | 1978-12-26 | 1980-07-09 | Matsushita Electric Industrial Co., Ltd. | Humidity detecting apparatus using a humidity detecting resistor ceramic element |
| EP0045950A3 (en) * | 1980-08-08 | 1983-06-29 | Kabushiki Kaisha Toshiba | Moisture sensitive element |
| EP0123385A1 (en) * | 1983-02-24 | 1984-10-31 | Kabushiki Kaisha Toshiba | Humidity-sensitive resistive element |
| US4529540A (en) * | 1983-02-24 | 1985-07-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Humidity-sensitive resistive element |
| EP0247313A3 (en) * | 1986-04-16 | 1990-01-31 | Robert Bosch Gmbh | Humidity sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |