FR2339169A1 - Hygrometer with monomolecular layer of hydrophilic cpd. - between two metal layers, with electrical capacity changing rapidly and linearly with humidity change (NL 26.7.77) - Google Patents
Hygrometer with monomolecular layer of hydrophilic cpd. - between two metal layers, with electrical capacity changing rapidly and linearly with humidity change (NL 26.7.77)Info
- Publication number
- FR2339169A1 FR2339169A1 FR7601904A FR7601904A FR2339169A1 FR 2339169 A1 FR2339169 A1 FR 2339169A1 FR 7601904 A FR7601904 A FR 7601904A FR 7601904 A FR7601904 A FR 7601904A FR 2339169 A1 FR2339169 A1 FR 2339169A1
- Authority
- FR
- France
- Prior art keywords
- hygrometer
- hydrophilic
- cpd
- linearly
- monomolecular layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
- G01N27/225—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity by using hygroscopic materials
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
A hygrometer consists of >=1 monomolecular layer of an organic cpd. (I) having hydrophilic gps. deposited on a metallic substrate and covered with a metallic layer which is sufficiently thin to allow ambient moisture to diffuse through. The substrate is pref. of Al and may consist of several non-touching parts and the cover pref. of Al or Au. (I) is esp. Ca behenate or alpha-hydroxydocosanoic acid. The hygrometer rapidly gives values of environmental humidity and is not subject to hystersis effects.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7601904A FR2339169A1 (en) | 1976-01-23 | 1976-01-23 | Hygrometer with monomolecular layer of hydrophilic cpd. - between two metal layers, with electrical capacity changing rapidly and linearly with humidity change (NL 26.7.77) |
NL7700316A NL7700316A (en) | 1976-01-23 | 1977-01-13 | HYGROMETER WITH MONOMOLECULAR LAYERS. |
FI770179A FI59675C (en) | 1976-01-23 | 1977-01-20 | HYGROMETER MED MONOMOLEKYLAERA SKIKT |
DE19772702487 DE2702487A1 (en) | 1976-01-23 | 1977-01-21 | MONOMOLECULAR SHEET HYGROMETER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7601904A FR2339169A1 (en) | 1976-01-23 | 1976-01-23 | Hygrometer with monomolecular layer of hydrophilic cpd. - between two metal layers, with electrical capacity changing rapidly and linearly with humidity change (NL 26.7.77) |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2339169A1 true FR2339169A1 (en) | 1977-08-19 |
FR2339169B1 FR2339169B1 (en) | 1978-10-06 |
Family
ID=9168316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7601904A Granted FR2339169A1 (en) | 1976-01-23 | 1976-01-23 | Hygrometer with monomolecular layer of hydrophilic cpd. - between two metal layers, with electrical capacity changing rapidly and linearly with humidity change (NL 26.7.77) |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2702487A1 (en) |
FI (1) | FI59675C (en) |
FR (1) | FR2339169A1 (en) |
NL (1) | NL7700316A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0094266A2 (en) * | 1982-05-11 | 1983-11-16 | Direction De La Meteorologie Du Ministere Des Transports | Method of making a temperature or a moisture sensor of the thin layer type, and sensor produced |
EP0058102B1 (en) * | 1981-01-19 | 1986-01-02 | Commissariat à l'Energie Atomique | Method of making a capacitance humidity sensor with a thin dielectric |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2848034A1 (en) * | 1978-11-06 | 1980-05-14 | Siemens Ag | CAPACITIVE HUMIDITY SENSOR |
US4272986A (en) * | 1979-04-16 | 1981-06-16 | Harris Corporation | Method and means for measuring moisture content of hermetic semiconductor devices |
-
1976
- 1976-01-23 FR FR7601904A patent/FR2339169A1/en active Granted
-
1977
- 1977-01-13 NL NL7700316A patent/NL7700316A/en not_active Application Discontinuation
- 1977-01-20 FI FI770179A patent/FI59675C/en not_active IP Right Cessation
- 1977-01-21 DE DE19772702487 patent/DE2702487A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0058102B1 (en) * | 1981-01-19 | 1986-01-02 | Commissariat à l'Energie Atomique | Method of making a capacitance humidity sensor with a thin dielectric |
EP0094266A2 (en) * | 1982-05-11 | 1983-11-16 | Direction De La Meteorologie Du Ministere Des Transports | Method of making a temperature or a moisture sensor of the thin layer type, and sensor produced |
FR2526949A1 (en) * | 1982-05-11 | 1983-11-18 | Ministere Transports Direct Me | METHOD FOR MANUFACTURING THIN FILM TYPE TEMPERATURE OR MOISTURE SENSOR AND SENSORS OBTAINED |
EP0094266A3 (en) * | 1982-05-11 | 1988-07-27 | Mini Transport Meteorolog | Method of making a temperature or a moisture sensor of the thin layer type, and sensor produced |
Also Published As
Publication number | Publication date |
---|---|
FI770179A (en) | 1977-07-24 |
NL7700316A (en) | 1977-07-26 |
FI59675B (en) | 1981-05-29 |
DE2702487A1 (en) | 1977-07-28 |
FI59675C (en) | 1984-02-21 |
FR2339169B1 (en) | 1978-10-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |