GB1361581A - Capacitance humidity sensing element - Google Patents

Capacitance humidity sensing element

Info

Publication number
GB1361581A
GB1361581A GB2088072A GB2088072A GB1361581A GB 1361581 A GB1361581 A GB 1361581A GB 2088072 A GB2088072 A GB 2088072A GB 2088072 A GB2088072 A GB 2088072A GB 1361581 A GB1361581 A GB 1361581A
Authority
GB
United Kingdom
Prior art keywords
electrode
sensor
core
dielectric
frame
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
GB2088072A
Other languages
English (en)
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 GB1361581A publication Critical patent/GB1361581A/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)
GB2088072A 1971-05-06 1972-05-04 Capacitance humidity sensing element Expired GB1361581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00140789A US3802268A (en) 1971-05-06 1971-05-06 Capacitance humidity sensing element

Publications (1)

Publication Number Publication Date
GB1361581A true GB1361581A (en) 1974-07-30

Family

ID=22492797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2088072A Expired GB1361581A (en) 1971-05-06 1972-05-04 Capacitance humidity sensing element

Country Status (7)

Country Link
US (1) US3802268A (enExample)
AU (1) AU460321B2 (enExample)
CA (1) CA959287A (enExample)
DE (1) DE2221656A1 (enExample)
FR (1) FR2135320B1 (enExample)
GB (1) GB1361581A (enExample)
IT (1) IT957725B (enExample)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4164868A (en) * 1972-10-12 1979-08-21 Vaisala Oy Capacitive humidity transducer
JPS5529774A (en) * 1978-08-24 1980-03-03 Shinei Kk Relative humidity detector
US4419021A (en) * 1980-02-04 1983-12-06 Matsushita Electric Industrial Co., Ltd. Multi-functional sensing or measuring system
US4552570A (en) * 1980-05-02 1985-11-12 Pall Corporation Adsorbent fractionator with automatic cycle control and process
FR2498329A1 (fr) * 1981-01-19 1982-07-23 Commissariat Energie Atomique Hygrometre capacitif a dielectrique mince et son procede de fabrication
US4429343A (en) 1981-12-03 1984-01-31 Leeds & Northrup Company Humidity sensing element
US4431962A (en) * 1982-03-11 1984-02-14 Honeywell, Inc. Capacitor monitoring by single resistor adjustment
DE3327159A1 (de) * 1983-07-28 1985-02-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Sensor zur messung einer dampfkonzentration
US4603372A (en) * 1984-11-05 1986-07-29 Direction De La Meteorologie Du Ministere Des Transports Method of fabricating a temperature or humidity sensor of the thin film type, and sensors obtained thereby
US4793182A (en) * 1987-06-02 1988-12-27 Djorup Robert Sonny Constant temperature hygrometer
US4793181A (en) * 1987-06-02 1988-12-27 Djorup Robert Sonny Constant temperature sorption hygrometer
US4965698A (en) * 1989-09-27 1990-10-23 Johnson Service Company Capacitance humidity sensor
US5177662A (en) * 1992-02-05 1993-01-05 Johnson Service Company Capacitance humidity sensor
US5345821A (en) * 1993-01-15 1994-09-13 A.I.R., Inc. Relative humidity sensing apparatus
US5337605A (en) * 1993-01-22 1994-08-16 Johnson Service Company Enclosure for humidity sensing element
WO1994028372A1 (en) * 1993-05-25 1994-12-08 Rosemount Inc. Organic chemical sensor
US5408381A (en) * 1994-04-28 1995-04-18 Johnson Service Company Capacitance humidity sensor
US5589289A (en) * 1995-09-27 1996-12-31 Motorola, Inc. Carbon electrode materials for electrochemical cells and method of making same
US6210368B1 (en) * 1998-04-30 2001-04-03 Medtronic, Inc. Reservoir volume sensors
US6222376B1 (en) 1999-01-16 2001-04-24 Honeywell International Inc. Capacitive moisture detector and method of making the same
DE10016427C2 (de) * 2000-04-01 2003-02-13 Bosch Gmbh Robert Sensor, insbesondere Feuchtesensor, und Verfahren zur Herstellung desselben
EP1178302B1 (en) * 2000-07-03 2005-10-26 Matsushita Electric Works, Ltd. Capacitance type moisture sensor and method of producing the same
US6724612B2 (en) 2002-07-09 2004-04-20 Honeywell International Inc. Relative humidity sensor with integrated signal conditioning
US6938482B2 (en) * 2003-06-03 2005-09-06 General Electric Co. Humidity sensor element containing polyphenylsulfone
US20060144437A1 (en) * 2004-12-29 2006-07-06 Rain Bird Corporation Capacitance-based moisture sensor and controller
US7836910B2 (en) * 2004-12-29 2010-11-23 Rain Bird Corporation Soil moisture sensor and controller
US8303897B2 (en) 2011-02-28 2012-11-06 Colla Jeannine O Capacitive sensor for organic chemicals comprising an elastomer and high dielectric materials with titanate
CN103344679A (zh) * 2013-07-16 2013-10-09 西安电子科技大学 基于ltcc的无源lc湿度传感器
DE102014226810A1 (de) * 2014-12-22 2016-06-23 Robert Bosch Gmbh Sensor zur Messung der Kohlenstoffdioxidkonzentration in einem Gasgemisch und Verfahren zu seiner Herstellung
FI127193B (en) 2016-12-22 2018-01-31 Vaisala Oyj Procedure in connection with a radio probe and system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350941A (en) * 1965-05-20 1967-11-07 Johnson Service Co Humidity sensing element
US3315518A (en) * 1966-02-07 1967-04-25 Research Corp Humidity sensing devices
US3582728A (en) * 1969-03-06 1971-06-01 Johnson Service Co Capacitance humidity sensing element

Also Published As

Publication number Publication date
AU460321B2 (en) 1975-04-24
IT957725B (it) 1973-10-20
CA959287A (en) 1974-12-17
FR2135320A1 (enExample) 1972-12-15
US3802268A (en) 1974-04-09
DE2221656A1 (de) 1972-11-09
AU4161672A (en) 1973-11-01
FR2135320B1 (enExample) 1976-01-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees