CA1111928A - Dew-sensing hygroscopic element - Google Patents

Dew-sensing hygroscopic element

Info

Publication number
CA1111928A
CA1111928A CA284,407A CA284407A CA1111928A CA 1111928 A CA1111928 A CA 1111928A CA 284407 A CA284407 A CA 284407A CA 1111928 A CA1111928 A CA 1111928A
Authority
CA
Canada
Prior art keywords
dew
sensing
hygroscopic
polyvinyl alcohol
degree
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
CA284,407A
Other languages
English (en)
French (fr)
Inventor
Hidetoshi Shimizu
Hidemasa Tamura
Yoshimi Makino
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of CA1111928A publication Critical patent/CA1111928A/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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
    • C08L29/02—Homopolymers or copolymers of unsaturated alcohols
    • C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Polymers & Plastics (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)
  • Compositions Of Macromolecular Compounds (AREA)
  • Non-Adjustable Resistors (AREA)
  • Drying Of Gases (AREA)
CA284,407A 1977-06-30 1977-08-10 Dew-sensing hygroscopic element Expired CA1111928A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7808477A JPS5412893A (en) 1977-06-30 1977-06-30 Dew-sensitive element material
JP78084/77 1977-06-30

Publications (1)

Publication Number Publication Date
CA1111928A true CA1111928A (en) 1981-11-03

Family

ID=13651970

Family Applications (1)

Application Number Title Priority Date Filing Date
CA284,407A Expired CA1111928A (en) 1977-06-30 1977-08-10 Dew-sensing hygroscopic element

Country Status (7)

Country Link
US (1) US4167725A (enExample)
JP (1) JPS5412893A (enExample)
CA (1) CA1111928A (enExample)
DE (1) DE2736414C2 (enExample)
FR (1) FR2396291A1 (enExample)
GB (1) GB1569832A (enExample)
NL (1) NL184856C (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263576A (en) * 1978-07-10 1981-04-21 Murata Manufacturing Co., Ltd. Humidity sensitive device
DE3270451D1 (en) * 1981-09-28 1986-05-15 Hitachi Ltd Humidity sensor and method for preparing a humidity sensor
JPS5873852A (ja) * 1981-10-28 1983-05-04 Hitachi Ltd 結露センサ
US4520341A (en) * 1981-12-08 1985-05-28 Sharp Kabushiki Kaisha Moisture responsive element with crosslinked organic membrane and protective layering
US4442422A (en) * 1982-03-31 1984-04-10 Murata Manufacturing Co., Ltd. Humidity sensitive resistor
US4433320A (en) * 1982-08-18 1984-02-21 Murata Manufacturing Co., Ltd. Dew sensor
FI65674C (fi) * 1982-12-21 1984-06-11 Vaisala Oy Kapacitiv fuktighetsgivare och foerfarande foer framstaellningdaerav
DE3305683C2 (de) * 1983-02-18 1986-08-14 Murata Manufacturing Co., Ltd., Nagaokakyo, Kyoto Feuchtigkeitsmeßfühler
JPS59200951A (ja) * 1983-04-28 1984-11-14 Sharp Corp 感湿素子
GB2138952B (en) * 1983-04-30 1986-07-30 Sharp Kk Producing electrical moisture sensors
GB8322418D0 (en) * 1983-08-19 1983-09-21 Emi Ltd Humidity sensor
GB2171798B (en) * 1985-02-22 1988-12-14 Protimeter Plc Condensation indicator
US5533393A (en) * 1995-01-13 1996-07-09 Honeywell Inc. Determination of dew point or absolute humidity
US6724612B2 (en) 2002-07-09 2004-04-20 Honeywell International Inc. Relative humidity sensor with integrated signal conditioning
US7551385B2 (en) * 2007-05-08 2009-06-23 International Business Machines Corporation Systems and method for selectively controlling a state of hydration of a magnetic data storage medium
US7656602B2 (en) * 2008-05-05 2010-02-02 International Business Machines Corporation Systems and methods for protecting a sensitive device from corrosion
US8318242B2 (en) 2008-05-05 2012-11-27 International Business Machines Corporation Systems and methods for protecting a sensitive device from corrosion
WO2009144672A1 (en) * 2008-05-30 2009-12-03 Nxp B.V. Sensor for determining humidity
JP2017133833A (ja) * 2014-06-16 2017-08-03 アルプス電気株式会社 霜検出器及び該霜検出器を用いた着霜状態検出装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937524A (en) * 1956-09-17 1960-05-24 Polytechnic Inst Brooklyn Polyelectrolyte water-indicating devices
US3295088A (en) * 1964-10-14 1966-12-27 Johnson Service Co Electrical humidity sensing element

Also Published As

Publication number Publication date
FR2396291B1 (enExample) 1981-09-11
NL184856B (nl) 1989-06-16
FR2396291A1 (fr) 1979-01-26
JPS6215824B2 (enExample) 1987-04-09
US4167725A (en) 1979-09-11
NL7708792A (nl) 1979-01-03
DE2736414C2 (de) 1985-05-23
GB1569832A (en) 1980-06-18
NL184856C (nl) 1989-11-16
DE2736414A1 (de) 1979-01-18
JPS5412893A (en) 1979-01-30

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Legal Events

Date Code Title Description
MKEX Expiry