JPS56168543A - Method for constituting bridge circuit for gas detection - Google Patents

Method for constituting bridge circuit for gas detection

Info

Publication number
JPS56168543A
JPS56168543A JP7142380A JP7142380A JPS56168543A JP S56168543 A JPS56168543 A JP S56168543A JP 7142380 A JP7142380 A JP 7142380A JP 7142380 A JP7142380 A JP 7142380A JP S56168543 A JPS56168543 A JP S56168543A
Authority
JP
Japan
Prior art keywords
gas
sensor
bridge circuit
methane gas
propane
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
JP7142380A
Other languages
Japanese (ja)
Inventor
Kenzo Kitamura
Tetsuo Miura
Yoshio Kobayashi
Hideaki Ebitani
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.)
Shibaura Electronics Co Ltd
Original Assignee
Shibaura Electronics Co 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 Shibaura Electronics Co Ltd filed Critical Shibaura Electronics Co Ltd
Priority to JP7142380A priority Critical patent/JPS56168543A/en
Publication of JPS56168543A publication Critical patent/JPS56168543A/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
    • 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
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature

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)

Abstract

PURPOSE:To enable both propane gas and methane gas to be detected by making the gas sensor in the bridge circuit act as a contact burn type device for propane gas, and making it act as a heat conducting type device for methane gas. CONSTITUTION:In the gas detecting bridge circuit, the gas sensor R1 is constituted by applying a high-melting-point oxide such as TiO2ZnO2, HfO2, NiO2, and the like as a catalyst on a platinum coil. When said sensor R1 is heated to 350-400 deg.C, even minute amount of propane gas, butane gas, and the like is reacted, the temperature of the platinum wire is increased, the resistance thereof is increased, and an output voltage is generated across A and B. If said high-melting-poing oxide is used as the catalyst, the reaction is not caused for methane gas, and the action as the contact burning is not carried out. Since heat conductivity of methane gas is higher than that of the air, the sensor R1 is cooled, the resistance is decreased, and the output voltage, whose polarity is opposite to that in the case of the contact burning method, is generated.
JP7142380A 1980-05-30 1980-05-30 Method for constituting bridge circuit for gas detection Pending JPS56168543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7142380A JPS56168543A (en) 1980-05-30 1980-05-30 Method for constituting bridge circuit for gas detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7142380A JPS56168543A (en) 1980-05-30 1980-05-30 Method for constituting bridge circuit for gas detection

Publications (1)

Publication Number Publication Date
JPS56168543A true JPS56168543A (en) 1981-12-24

Family

ID=13460079

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7142380A Pending JPS56168543A (en) 1980-05-30 1980-05-30 Method for constituting bridge circuit for gas detection

Country Status (1)

Country Link
JP (1) JPS56168543A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234251A2 (en) 1986-01-21 1987-09-02 Drägerwerk Aktiengesellschaft Method and device for detecting combustible gas
JP2015025782A (en) * 2013-07-29 2015-02-05 新コスモス電機株式会社 Contact combustion type gas sensor
JP2017142274A (en) * 2017-05-30 2017-08-17 新コスモス電機株式会社 Contact combustion type gas sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234251A2 (en) 1986-01-21 1987-09-02 Drägerwerk Aktiengesellschaft Method and device for detecting combustible gas
JP2015025782A (en) * 2013-07-29 2015-02-05 新コスモス電機株式会社 Contact combustion type gas sensor
JP2017142274A (en) * 2017-05-30 2017-08-17 新コスモス電機株式会社 Contact combustion type gas sensor

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