GB1312888A - Hygrometer - Google Patents
HygrometerInfo
- Publication number
- GB1312888A GB1312888A GB4631771A GB4631771A GB1312888A GB 1312888 A GB1312888 A GB 1312888A GB 4631771 A GB4631771 A GB 4631771A GB 4631771 A GB4631771 A GB 4631771A GB 1312888 A GB1312888 A GB 1312888A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- air
- nozzle
- oct
- moisture content
- 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
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
-
- 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
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)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
1312888 Measuring moisture content of air OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES 5 Oct 1971 [5 Oct 1970] 46317/71 Heading G1N Rapid changes in the moisture content of air near an agitated water surface such as the sea are detected by sucking the air through a convergentdivergent nozzle and measuring its dielectric constant by a capacitor 22 arranged just upstream of the narrowest part of the nozzle where the air is flowing at the speed of sound. The sensing capacitor comprises interleaned parallel plates Fig. 2 and 3, (not shown). One or more of the plates of the capacitor may consist of two outer layers (36, 37) each carrying on its inner surface a silicon dioxide layer (32, 33) coated with metal film (34, 35) arranged with the metal films in contact to provide a temperature compensation capacitor. The sensing capacitor and compensating capacitor are connected in an A.C. brige circuit Fig. 4, (not shown). The nozzle is within a tubular housing 11 also carrying a thermocouple 66, static pressure measuring means 64, and circuitry 61, 62, 63. Tubular support 19 is connected at 20 to suction. A protective grid 65 is provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7035859A FR2109148A5 (en) | 1970-10-05 | 1970-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1312888A true GB1312888A (en) | 1973-04-11 |
Family
ID=9062264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4631771A Expired GB1312888A (en) | 1970-10-05 | 1971-10-05 | Hygrometer |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2149256C3 (en) |
FR (1) | FR2109148A5 (en) |
GB (1) | GB1312888A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2001521C2 (en) * | 2008-04-25 | 2009-10-27 | Fluid Well Instr B V | Device and method for measuring an electrical property of a fluid flowing through a tube. |
-
1970
- 1970-10-05 FR FR7035859A patent/FR2109148A5/fr not_active Expired
-
1971
- 1971-10-02 DE DE19712149256 patent/DE2149256C3/en not_active Expired
- 1971-10-05 GB GB4631771A patent/GB1312888A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2001521C2 (en) * | 2008-04-25 | 2009-10-27 | Fluid Well Instr B V | Device and method for measuring an electrical property of a fluid flowing through a tube. |
US8264241B2 (en) | 2008-04-25 | 2012-09-11 | Fluid Well Instruments, B.V. | Device and method for measuring an electrical property of a fluid flowing through a pipe |
Also Published As
Publication number | Publication date |
---|---|
FR2109148A5 (en) | 1972-05-26 |
DE2149256C3 (en) | 1975-07-03 |
DE2149256B2 (en) | 1974-11-07 |
DE2149256A1 (en) | 1972-04-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |