GB1103252A - Electrical humidity sensing element - Google Patents

Electrical humidity sensing element

Info

Publication number
GB1103252A
GB1103252A GB8468/65A GB846865A GB1103252A GB 1103252 A GB1103252 A GB 1103252A GB 8468/65 A GB8468/65 A GB 8468/65A GB 846865 A GB846865 A GB 846865A GB 1103252 A GB1103252 A GB 1103252A
Authority
GB
United Kingdom
Prior art keywords
core
layer
cellulose ester
resistive
sensitive
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
GB8468/65A
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.)
Johnson Service Co
Original Assignee
Johnson Service Co
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 Johnson Service Co filed Critical Johnson Service Co
Publication of GB1103252A publication Critical patent/GB1103252A/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
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/10—Measuring moisture content, e.g. by measuring change in length of hygroscopic filament; Hygrometers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/10—Adjustable resistors adjustable by mechanical pressure or force

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

1,103,252. Semi-conductor devices. JOHNSON SERVICE CO. 26 Feb., 1965 [14 Oct., 1964], No. 8468/65. Heading HlK. [Also in Division G1 A resistive strain-sensitive core member 2, Fig. 2, is bonded to a surrounding layer 3 of material which changes its dimensions with changes in relative humidity of the adjacent atmosphere. The core 2 may be of an inorganic polymer, or of an organic polymer such as a cellulose ester, and has conductive particles of, for example carbon, aluminium dust, or zinc dust embedded therein. A further layer (7, Fig. 3 not shown) of cellulose ester having no conductive particles may separate the resistive core (5) and the outer moisture-sensitive layer (8) the structure being formed by coating the core (5) with cellulose ester and hydrolysing the outer surface in an alkali or acid bath to form regenerated cellulose which constitutes the outer layer (8). The complete transducer alternatively may be cylindrical in form (Fig. 4 not shown). The resistive core is mechanically clamped in operation and electrically connected to a battery and ammeter (14 15, Fig. 5, not shown). Several alternative materials are quoted for both the core members and the moisture-sensitive layer.
GB8468/65A 1964-10-14 1965-02-26 Electrical humidity sensing element Expired GB1103252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US403778A US3295088A (en) 1964-10-14 1964-10-14 Electrical humidity sensing element

Publications (1)

Publication Number Publication Date
GB1103252A true GB1103252A (en) 1968-02-14

Family

ID=23596968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8468/65A Expired GB1103252A (en) 1964-10-14 1965-02-26 Electrical humidity sensing element

Country Status (2)

Country Link
US (1) US3295088A (en)
GB (1) GB1103252A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141548A (en) * 1983-06-16 1984-12-19 Welwyn Electronics Ltd Strain-gauge transducer

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359521A (en) * 1965-10-26 1967-12-19 Cognitronics Corp Bistable resistance memory device
US3461723A (en) * 1967-07-10 1969-08-19 Johnson Service Co Synthetic humidity sensing element and method of preparing the same
US3440881A (en) * 1967-09-27 1969-04-29 Johnson Service Co Humidity sensing element
US3458845A (en) * 1967-11-08 1969-07-29 Johnson Service Co Crosslinked electrical resistance humidity sensing element
US3686606A (en) * 1970-08-24 1972-08-22 Johnson Service Co Electrical humidity sensing element
AU5805873A (en) * 1972-07-25 1975-01-16 Koichi Sugaya Humidity sensor electrode assembly
US4125822A (en) * 1972-10-23 1978-11-14 Benno Perren Probe for determining organic liquids
US3916367A (en) * 1974-01-22 1975-10-28 Honeywell Inc Relative humidity sensor
US4152304A (en) * 1975-02-06 1979-05-01 Universal Oil Products Company Pressure-sensitive flexible resistors
US4050756A (en) * 1975-12-22 1977-09-27 International Telephone And Telegraph Corporation Conductive elastomer connector and method of making same
JPS5412893A (en) * 1977-06-30 1979-01-30 Sony Corp Dew-sensitive element material
US4129501A (en) * 1977-09-07 1978-12-12 Haynes Edward M Method and apparatus for detecting water in oil
US4182357A (en) * 1978-03-02 1980-01-08 Leonard Ornstein Method of controlling the relative humidity in a soil environment and apparatus for accomplishing same
US4298115A (en) * 1979-02-09 1981-11-03 Micro-Circuits Company Time-lapse indicator
US4298855A (en) * 1980-08-26 1981-11-03 Honeywell Inc. Conductive polymer film humidity sensor
US4487057A (en) * 1980-09-16 1984-12-11 Raychem Corporation Continuous sense and locate device
US4449396A (en) * 1982-03-01 1984-05-22 Carrier Corporation Probe for measuring electrical conductance
US4442422A (en) * 1982-03-31 1984-04-10 Murata Manufacturing Co., Ltd. Humidity sensitive resistor
JPH01213564A (en) * 1988-02-23 1989-08-28 Japan Gore Tex Inc Humidity-sensitive element and its manufacture
GB2222261B (en) * 1988-08-22 1992-09-16 Seiko Epson Corp Humidity measuring apparatus
US5378995A (en) * 1992-03-05 1995-01-03 Mitsubishi Cable Industries, Ltd. Low molecular weight organic liquid detection sensor in the shape of a wire and detector using this sensor
FI92439C (en) * 1993-09-29 1994-11-10 Vaisala Oy Electric impedance sensor for measuring physical quantities, especially temperature or humidity and method for producing the sensor in question

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE462350A (en) * 1944-10-06 1900-01-01 Standard Oil Dev Co
US2472214A (en) * 1947-10-22 1949-06-07 Hurvitz Hyman Pressure responsive electrical resistor
US3073162A (en) * 1959-04-09 1963-01-15 Ulanet Herman Liquid operated timing devices
US3045198A (en) * 1959-12-11 1962-07-17 James P Dolan Detection device
GB1037822A (en) * 1961-12-15 1966-08-03 Ass Elect Ind Improvements relating to non-linear electrical resistance elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141548A (en) * 1983-06-16 1984-12-19 Welwyn Electronics Ltd Strain-gauge transducer

Also Published As

Publication number Publication date
US3295088A (en) 1966-12-27

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