JPS56164950A - Gas detector - Google Patents

Gas detector

Info

Publication number
JPS56164950A
JPS56164950A JP6939380A JP6939380A JPS56164950A JP S56164950 A JPS56164950 A JP S56164950A JP 6939380 A JP6939380 A JP 6939380A JP 6939380 A JP6939380 A JP 6939380A JP S56164950 A JPS56164950 A JP S56164950A
Authority
JP
Japan
Prior art keywords
detecting
gas
humidity
electrode
heating
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
JP6939380A
Other languages
Japanese (ja)
Inventor
Fumio Fukushima
Jiro Terada
Koji Nitta
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP6939380A priority Critical patent/JPS56164950A/en
Publication of JPS56164950A publication Critical patent/JPS56164950A/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
    • G01N27/12—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

Abstract

PURPOSE:To detect humidity and gas with one detecting element and a device by attaching a heating element to a metallic oxide P type semiconductor which is sensitive to humidity and gas, further connecting a reference detector in series thereto and providing a power source for heating. CONSTITUTION:Electrodes 2, 3 are formed on the surface of a metallic oxide P type semiconductor (MgCr2O4 ceramic conductor or the like) 1 by printing or the like of paste of RuO2 type. An electrode 4 for heating element is then baked on the electrode 3 by using Ag type paste. Lead wires (Pt-Ir wires or the like) 6, 5, 7 are connected to the electrodes 2, 3, 4, respectively, and lead wires are electrowelded to the fixing terminals 9, 10, 11 on an insulation supporting plate 8, whereby the humidity-gas detecting element is manufactured. A power source VS1 for detecting resistance and a power source VH1 for heating the heating element electrode are connected to the element 1, and a reference resistor RL1 is connected to the electrode 2 of the element 1. At the time of detecting humidity, a switch SW1 is closed, and at the time of detecting gas, it is closed. The voltage divided by the resistor RL1 and the element 1 is used as a detecting output, whereby humidity or gas is detected.
JP6939380A 1980-05-23 1980-05-23 Gas detector Pending JPS56164950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6939380A JPS56164950A (en) 1980-05-23 1980-05-23 Gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6939380A JPS56164950A (en) 1980-05-23 1980-05-23 Gas detector

Publications (1)

Publication Number Publication Date
JPS56164950A true JPS56164950A (en) 1981-12-18

Family

ID=13401305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6939380A Pending JPS56164950A (en) 1980-05-23 1980-05-23 Gas detector

Country Status (1)

Country Link
JP (1) JPS56164950A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59228155A (en) * 1983-06-10 1984-12-21 Ngk Spark Plug Co Ltd Gas sensor with heater
JPS60227158A (en) * 1984-04-25 1985-11-12 Ngk Spark Plug Co Ltd Gas sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5610244A (en) * 1979-07-04 1981-02-02 Matsushita Electric Ind Co Ltd Temperature sensor controlling device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5610244A (en) * 1979-07-04 1981-02-02 Matsushita Electric Ind Co Ltd Temperature sensor controlling device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59228155A (en) * 1983-06-10 1984-12-21 Ngk Spark Plug Co Ltd Gas sensor with heater
JPS60227158A (en) * 1984-04-25 1985-11-12 Ngk Spark Plug Co Ltd Gas sensor

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