JPS5480190A - Humidity sensor - Google Patents

Humidity sensor

Info

Publication number
JPS5480190A
JPS5480190A JP14749877A JP14749877A JPS5480190A JP S5480190 A JPS5480190 A JP S5480190A JP 14749877 A JP14749877 A JP 14749877A JP 14749877 A JP14749877 A JP 14749877A JP S5480190 A JPS5480190 A JP S5480190A
Authority
JP
Japan
Prior art keywords
humidity
light
output
conditioning system
sensor
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.)
Pending
Application number
JP14749877A
Other languages
Japanese (ja)
Inventor
Toshiharu Suzuki
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP14749877A priority Critical patent/JPS5480190A/en
Publication of JPS5480190A publication Critical patent/JPS5480190A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/81—Indicating humidity

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (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 Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

PURPOSE:To produce humidity sensor capable of displaying hymidity and controlling the humdity conditioning system directly by using electric output thereof, by converting the change of color of a substance which discolors due to humidity in the air into an elelctric signal by means of a photocoupler. CONSTITUTION:A suspension of ultrafine alumina powder and copper slat is coated on an alumina ceramic substrate measuring about 4 X 4 mm, and dried to form a sensor element. In the sensor chamber shutting off external light, the light from the light source, which is a light emitting diode, is projected to said sensor element, and the reflected light is received by a silicon photo diode through a filter, and the humidity is displayed by using the output thereof. Also using this output, the humidity in air conditioning system can be controlled.
JP14749877A 1977-12-08 1977-12-08 Humidity sensor Pending JPS5480190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14749877A JPS5480190A (en) 1977-12-08 1977-12-08 Humidity sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14749877A JPS5480190A (en) 1977-12-08 1977-12-08 Humidity sensor

Publications (1)

Publication Number Publication Date
JPS5480190A true JPS5480190A (en) 1979-06-26

Family

ID=15431730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14749877A Pending JPS5480190A (en) 1977-12-08 1977-12-08 Humidity sensor

Country Status (1)

Country Link
JP (1) JPS5480190A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118641U (en) * 1980-02-08 1981-09-10
JP2002370350A (en) * 2001-04-30 2002-12-24 Hewlett Packard Co <Hp> Environmental factor detection system for ink jet printing
US10347114B2 (en) 2017-06-08 2019-07-09 Parker-Hannifin Corporation Moisture sensing system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56118641U (en) * 1980-02-08 1981-09-10
JP2002370350A (en) * 2001-04-30 2002-12-24 Hewlett Packard Co <Hp> Environmental factor detection system for ink jet printing
US10347114B2 (en) 2017-06-08 2019-07-09 Parker-Hannifin Corporation Moisture sensing system

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Legal Events

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A621 Written request for application examination

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Effective date: 20041022

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