GB1312888A - Hygrometer - Google Patents

Hygrometer

Info

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
Application number
GB4631771A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Office National dEtudes et de Recherches Aerospatiales ONERA
Original Assignee
Office National dEtudes et de Recherches Aerospatiales ONERA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Office National dEtudes et de Recherches Aerospatiales ONERA filed Critical Office National dEtudes et de Recherches Aerospatiales ONERA
Publication of GB1312888A publication Critical patent/GB1312888A/en
Expired legal-status Critical Current

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.
GB4631771A 1970-10-05 1971-10-05 Hygrometer Expired GB1312888A (en)

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)

* Cited by examiner, † Cited by third party
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.

Cited By (2)

* Cited by examiner, † Cited by third party
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