FR2335841A1 - Sensor for detecting reducing gases - in which resistance of a semiconducting oxide varies with concn. of reducing gas - Google Patents

Sensor for detecting reducing gases - in which resistance of a semiconducting oxide varies with concn. of reducing gas

Info

Publication number
FR2335841A1
FR2335841A1 FR7637992A FR7637992A FR2335841A1 FR 2335841 A1 FR2335841 A1 FR 2335841A1 FR 7637992 A FR7637992 A FR 7637992A FR 7637992 A FR7637992 A FR 7637992A FR 2335841 A1 FR2335841 A1 FR 2335841A1
Authority
FR
France
Prior art keywords
sensor
pref
coil
reducing gas
refractory material
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.)
Granted
Application number
FR7637992A
Other languages
French (fr)
Other versions
FR2335841B1 (en
Inventor
Hikofumi Oido
Masatsugu Yamaguchi
Seiichi Nakatani
Hideyuki Okinaka
Michio Matsuoka
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
Priority claimed from JP15143975A external-priority patent/JPS5274392A/en
Priority claimed from JP5585476A external-priority patent/JPS52138997A/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2335841A1 publication Critical patent/FR2335841A1/en
Application granted granted Critical
Publication of FR2335841B1 publication Critical patent/FR2335841B1/fr
Granted 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (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

Sensor for reducing gases, the novelty being the use of a tubular heating element using a multi-turn coil of wire coated by a refractory material to prevent adjacent turns from touching each other. In the middle of the tube is a sensor in which electrical leads are partly embedded, and the sensor does not touch the heating coil, which is designed to heat the sensor by radiation. The refractory material is pref. applied at two locations on each turn of wire, or it may completely cover the coil to form a tube. The coil of wire is pref. made from (a) Pt-Ir; or (b) Fe-Cr-Al alloy. The refractory material pref. consists of an inorganic binder, whereas the sensor is pref. a semiconducting metal oxide with a specific resistance which alters in the presence of a reducing gas. In the pref. mfg. process a conducting laminar frame is used with a straight base and two pairs of projecting parts, one pair being used to support the heating coil, the other pair to support the sensor via its electric leads. Accurate and reliable measurement of the concn. of a reducing gas even when the temp. in the vicinity of the sensor varies, as the heater coil keeps the sensor at a constant temp., necessary for accurate measurement.
FR7637992A 1975-12-17 1976-12-16 Sensor for detecting reducing gases - in which resistance of a semiconducting oxide varies with concn. of reducing gas Granted FR2335841A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15143975A JPS5274392A (en) 1975-12-17 1975-12-17 Reductive gas detector
JP5585476A JPS52138997A (en) 1976-05-14 1976-05-14 Detector of reducing gas

Publications (2)

Publication Number Publication Date
FR2335841A1 true FR2335841A1 (en) 1977-07-15
FR2335841B1 FR2335841B1 (en) 1980-04-25

Family

ID=26396750

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7637992A Granted FR2335841A1 (en) 1975-12-17 1976-12-16 Sensor for detecting reducing gases - in which resistance of a semiconducting oxide varies with concn. of reducing gas

Country Status (2)

Country Link
DE (1) DE2656895A1 (en)
FR (1) FR2335841A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032476A1 (en) * 1980-08-28 1982-04-01 Siemens AG, 1000 Berlin und 8000 München SELECTIVE THICK-LAYER GAS SENSOR HIGH SENSITIVITY AND STABILITY FOR DETECTING AND MEASURING GASEOUS HYDROCARBON IMPURITIES IN THE AIR BASED ON TOLFRAMOXIDE (WHERE (DOWN ARROW)) X (POSTED), HOWEVER
GB2111215A (en) * 1981-10-31 1983-06-29 Alastair Sibbald Electrochemical sensor assembly

Also Published As

Publication number Publication date
FR2335841B1 (en) 1980-04-25
DE2656895A1 (en) 1977-06-30

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Legal Events

Date Code Title Description
ST Notification of lapse