GB1393901A - Moisture sensors - Google Patents

Moisture sensors

Info

Publication number
GB1393901A
GB1393901A GB1664371A GB1664371A GB1393901A GB 1393901 A GB1393901 A GB 1393901A GB 1664371 A GB1664371 A GB 1664371A GB 1664371 A GB1664371 A GB 1664371A GB 1393901 A GB1393901 A GB 1393901A
Authority
GB
United Kingdom
Prior art keywords
moisture
wire
length
sensitive
aluminium
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
GB1664371A
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.)
Molecular Controls Ltd
Original Assignee
Molecular Controls Ltd
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 Molecular Controls Ltd filed Critical Molecular Controls Ltd
Priority to GB1664371A priority Critical patent/GB1393901A/en
Priority to JP5031372A priority patent/JPS5517336B1/ja
Priority to US256532A priority patent/US3895271A/en
Priority to DE2225092A priority patent/DE2225092C3/en
Publication of GB1393901A publication Critical patent/GB1393901A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/43—Electric condenser making

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 Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1393901 Moisture-sensitive transducers MOLECULAR CONTROLS Ltd 4 May 1972 [24 May 1971] 16643/71 Heading GIN A moisture-sensitive transducer comprises a short length of aluminium wire which for some two-thirds of its length is flattened as at 4 Fig. 7 polished and anodised by dipping in a solution of sodium or potassium hydroxide. A thin line of colloidal silver 10 is painted on the oxide layer and connected by a blob 9 of conductive cement to a lead wire 8. The round end of the wire is fixed in a metal tube 6. The unit constitutes a capacitor whose aluminium oxide dielectric absorbs moisture to vary the capacitance accordingly.
GB1664371A 1971-05-24 1971-05-24 Moisture sensors Expired GB1393901A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1664371A GB1393901A (en) 1971-05-24 1971-05-24 Moisture sensors
JP5031372A JPS5517336B1 (en) 1971-05-24 1972-05-20
US256532A US3895271A (en) 1971-05-24 1972-05-24 Moisture sensors
DE2225092A DE2225092C3 (en) 1971-05-24 1972-05-24 Humidity sensor for electrical hygrometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1664371A GB1393901A (en) 1971-05-24 1971-05-24 Moisture sensors

Publications (1)

Publication Number Publication Date
GB1393901A true GB1393901A (en) 1975-05-14

Family

ID=10081022

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1664371A Expired GB1393901A (en) 1971-05-24 1971-05-24 Moisture sensors

Country Status (4)

Country Link
US (1) US3895271A (en)
JP (1) JPS5517336B1 (en)
DE (1) DE2225092C3 (en)
GB (1) GB1393901A (en)

Cited By (1)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156268A (en) * 1977-08-29 1979-05-22 Longwood Machine Works, Inc. Humidity sensing element and method of manufacture thereof
US4280115A (en) * 1978-02-17 1981-07-21 General Electric Company Humidity sensor
US20140070827A1 (en) * 2012-09-13 2014-03-13 Alliance For Sustainable Energy, Llc Systems and methods for compensated barrier permeability testing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1068413A (en) * 1911-11-17 1913-07-29 Westinghouse Electric & Mfg Co Method of and apparatus for coating wires and cables.
US2143369A (en) * 1934-06-06 1939-01-10 Cornell Dubilier Corp Method of making electrical condensers
NL252982A (en) * 1959-06-23
US3075385A (en) * 1960-12-15 1963-01-29 Clifford M Stover Hygrometer
US3523244A (en) * 1967-11-01 1970-08-04 Panametrics Device for measurement of absolute humidity
US3683243A (en) * 1970-10-21 1972-08-08 Moisture Control And Measureme Electrical hygrometers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS5517336B1 (en) 1980-05-10
DE2225092C3 (en) 1980-10-30
DE2225092B2 (en) 1980-02-28
DE2225092A1 (en) 1972-12-07
US3895271A (en) 1975-07-15

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years