SE8105260L - Gas Detector - Google Patents

Gas Detector

Info

Publication number
SE8105260L
SE8105260L SE8105260A SE8105260A SE8105260L SE 8105260 L SE8105260 L SE 8105260L SE 8105260 A SE8105260 A SE 8105260A SE 8105260 A SE8105260 A SE 8105260A SE 8105260 L SE8105260 L SE 8105260L
Authority
SE
Sweden
Prior art keywords
gas
target
oxide
sensing element
gases
Prior art date
Application number
SE8105260A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
S Kusanagi
S Akiyama
T Nobutani
H Kawamura
Original Assignee
Matsushita Electric Works 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
Priority claimed from JP12776480A external-priority patent/JPS5752850A/en
Priority claimed from JP14976080A external-priority patent/JPS5773662A/en
Priority claimed from JP14975980A external-priority patent/JPS5773661A/en
Priority claimed from JP16489180A external-priority patent/JPS5788356A/en
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of SE8105260L publication Critical patent/SE8105260L/en

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
    • G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

A gas detector for detecting a target gas such as hydrogen methane or butane, detects the presence of that gas alone or when in the presence of other gases. The electrical resistance of a main gas sensing element (Sm) responds to both target and non-target gases, and the electrical resistance of an auxiliary gas sensing element (Ss) responds more to non-target gases than target gases. An alarm circuit (AL) is triggered by an alarm signal (Om2) from the main sensing element (Sm) when the gas concentration exceeds a specified level (Vm1), and a second alarm signal (Om3) generated by the auxiliary sensing element (Ss) at a lower level (Vm2) is blocked by detection of a concentration of non-target gas exceeding a specified level (Vs). The sensing elements may be mixtures of metallic oxides, e.g. (1) a mixture of indium oxide, tin oxide or ferric oxide, and palladium oxide which may further contain platinum oxide or rhodium oxide, or (2) a mixture of ZrO2, MgO and Cr2O3. <IMAGE>
SE8105260A 1980-09-13 1981-09-04 Gas Detector SE8105260L (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP12776480A JPS5752850A (en) 1980-09-13 1980-09-13 Gas leakage warning device
JP14976080A JPS5773662A (en) 1980-10-25 1980-10-25 Sensing element for combustible gas
JP14975980A JPS5773661A (en) 1980-10-25 1980-10-25 Sensing element for combustible gas
JP16489180A JPS5788356A (en) 1980-11-21 1980-11-21 Alarm device for gas leakage

Publications (1)

Publication Number Publication Date
SE8105260L true SE8105260L (en) 1982-03-14

Family

ID=27471330

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8105260A SE8105260L (en) 1980-09-13 1981-09-04 Gas Detector

Country Status (4)

Country Link
DE (1) DE3136034A1 (en)
GB (1) GB2086583B (en)
NL (1) NL8104198A (en)
SE (1) SE8105260L (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3377738D1 (en) * 1982-08-27 1988-09-22 Toshiba Kk Co gas detecting device and circuit for driving the same
JPS6170449A (en) * 1984-09-13 1986-04-11 Toshiba Corp Gas detecting element
DE3435874A1 (en) * 1984-09-29 1986-04-03 Horst Dipl.-Ing. 2000 Hamburg Krauleidies METHOD AND ARRANGEMENT FOR MONITORING THE FOREIGN GAS CONCENTRATION IN A GASEOUS CARRIER MEDIUM
DE3739406A1 (en) * 1987-11-20 1989-06-01 Siemens Ag Method for operating a sensor arrangement for detecting gases
DE4334954A1 (en) * 1993-10-14 1995-06-29 Theo Bender Apparatus for monitoring gas leaks in domestic hot water system
DE19536719C2 (en) * 1995-09-30 1997-09-11 Dresden Ev Inst Festkoerper Hydrogen sensitive component
US5908600A (en) * 1996-07-23 1999-06-01 Apl Group International, Llc Monitor for detecting hydrocarbons and other gases in an open area
DE19938280C1 (en) * 1999-08-12 2001-03-15 Draeger Sicherheitstech Gmbh Process for improving the operational safety of optical gas sensors
CN107543845B (en) * 2016-06-23 2020-05-26 华邦电子股份有限公司 Gas sensor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479257A (en) * 1966-11-25 1969-11-18 Gen Electric Methods and apparatus for measuring the content of hydrogen or reducing gases in an atmosphere
JPS5023317B1 (en) * 1969-12-19 1975-08-06
US3835529A (en) * 1970-09-23 1974-09-17 N Taguchi Gas detecting device and method of making same
US3732519A (en) * 1970-09-23 1973-05-08 N Taguchi Semiconductor gas detecting device
US4219806A (en) * 1978-09-15 1980-08-26 American District Telegraph Company Dual alarm gas detector

Also Published As

Publication number Publication date
GB2086583A (en) 1982-05-12
DE3136034C2 (en) 1988-05-05
DE3136034A1 (en) 1982-09-09
NL8104198A (en) 1982-04-01
GB2086583B (en) 1985-06-12

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