GB947857A - Improvements relating to electrical hygrometers - Google Patents

Improvements relating to electrical hygrometers

Info

Publication number
GB947857A
GB947857A GB21423/59A GB2142359A GB947857A GB 947857 A GB947857 A GB 947857A GB 21423/59 A GB21423/59 A GB 21423/59A GB 2142359 A GB2142359 A GB 2142359A GB 947857 A GB947857 A GB 947857A
Authority
GB
United Kingdom
Prior art keywords
layer
pores
june
anodised
covered
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
GB21423/59A
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.)
Individual
Original Assignee
Individual
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
Priority to NL130518D priority Critical patent/NL130518C/xx
Priority to NL252982D priority patent/NL252982A/xx
Application filed by Individual filed Critical Individual
Priority to GB21423/59A priority patent/GB947857A/en
Priority to US37800A priority patent/US3083573A/en
Priority to FR830606A priority patent/FR1264142A/en
Priority to CH710160A priority patent/CH383034A/en
Publication of GB947857A publication Critical patent/GB947857A/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
    • 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

947,857. Measuring electrically. J. L. SHAW. June 21, 1960 [ June 23, 1959], No. 21423/59. Heading G1N. A humidity sensitive capacitor comprises a metal base provided with an insulating surface layer having pores or capillaries extending part way through from its outer surface and filled with an aqueous solution of a hygroscopic substance, the layer being covered with a water vapour permeable conducting layer. In the preferred method of manufacture of the element an aluminium wire is anodised to form a surface layer having pores, this layer is covered, e.g. by graphite or by vacuum deposition with a layer of gold, the hygroscopic solution being painted over the anodised layer, or alternatively over the conducting layer if the layer is water permeable. The hygroscopic solution may be lithium chloride, calcium chloride, or chromium oxide. The element may be connected in an A.C. bridge circuit. Acccording to the Provisional Specification the device is heated before use in a very dry atmosphere or may be heated in situ.
GB21423/59A 1959-06-23 1959-06-23 Improvements relating to electrical hygrometers Expired GB947857A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL130518D NL130518C (en) 1959-06-23
NL252982D NL252982A (en) 1959-06-23
GB21423/59A GB947857A (en) 1959-06-23 1959-06-23 Improvements relating to electrical hygrometers
US37800A US3083573A (en) 1959-06-23 1960-06-21 Electrical hygrometers
FR830606A FR1264142A (en) 1959-06-23 1960-06-21 element sensitive to humidity, usable in a hygrometer
CH710160A CH383034A (en) 1959-06-23 1960-06-22 Humidity sensitive element for electric hygrometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21423/59A GB947857A (en) 1959-06-23 1959-06-23 Improvements relating to electrical hygrometers

Publications (1)

Publication Number Publication Date
GB947857A true GB947857A (en) 1964-01-29

Family

ID=10162696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21423/59A Expired GB947857A (en) 1959-06-23 1959-06-23 Improvements relating to electrical hygrometers

Country Status (4)

Country Link
US (1) US3083573A (en)
CH (1) CH383034A (en)
GB (1) GB947857A (en)
NL (2) NL130518C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4859882A (en) * 1971-11-24 1973-08-22
GB2000292A (en) * 1977-06-06 1979-01-04 Matsushita Electric Ind Co Ltd Humidity sensor of capacitance change type

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243674A (en) * 1963-02-01 1966-03-29 Ebert Gotthold Capacitor type sensing device
US3350941A (en) * 1965-05-20 1967-11-07 Johnson Service Co Humidity sensing element
US3440396A (en) * 1965-11-22 1969-04-22 Ugc Ind Inc Moisture and snow detector
US3416356A (en) * 1965-12-17 1968-12-17 Vapor Corp Dew point hygrometer
GB1393901A (en) * 1971-05-24 1975-05-14 Molecular Controls Moisture sensors
US3765100A (en) * 1971-09-22 1973-10-16 Gen Electric Capacitive sensing dryer control
FR2486656A1 (en) * 1980-07-09 1982-01-15 Commissariat Energie Atomique CAPACITIVE HYGROMETER
EP2494343A2 (en) * 2009-10-30 2012-09-05 Peter Hagl Sensor device
US20120167392A1 (en) 2010-12-30 2012-07-05 Stmicroelectronics Pte. Ltd. Razor with chemical and biological sensor
US9027400B2 (en) * 2011-12-02 2015-05-12 Stmicroelectronics Pte Ltd. Tunable humidity sensor with integrated heater
US9019688B2 (en) 2011-12-02 2015-04-28 Stmicroelectronics Pte Ltd. Capacitance trimming with an integrated heater
US20140070827A1 (en) * 2012-09-13 2014-03-13 Alliance For Sustainable Energy, Llc Systems and methods for compensated barrier permeability testing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554440A (en) * 1946-02-21 1951-05-22 Serdex Inc Meteorological instrument
US2701832A (en) * 1951-11-09 1955-02-08 Phillips Petroleum Co Moisture-sensitive element
US2710324A (en) * 1953-02-04 1955-06-07 Harmantas Christos Sensing element for the electric hygrometer
US2884593A (en) * 1953-05-06 1959-04-28 Miyata Akira Device for determining moisture content of various materials and substances

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4859882A (en) * 1971-11-24 1973-08-22
JPS5125356B2 (en) * 1971-11-24 1976-07-30
GB2000292A (en) * 1977-06-06 1979-01-04 Matsushita Electric Ind Co Ltd Humidity sensor of capacitance change type
GB2000292B (en) * 1977-06-06 1982-03-17 Matsushita Electric Ind Co Ltd Humidity sensor of capacitance change type

Also Published As

Publication number Publication date
CH383034A (en) 1964-10-15
NL130518C (en)
US3083573A (en) 1963-04-02
NL252982A (en)

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