JPS5616861A - Gas detecting unit - Google Patents

Gas detecting unit

Info

Publication number
JPS5616861A
JPS5616861A JP9287279A JP9287279A JPS5616861A JP S5616861 A JPS5616861 A JP S5616861A JP 9287279 A JP9287279 A JP 9287279A JP 9287279 A JP9287279 A JP 9287279A JP S5616861 A JPS5616861 A JP S5616861A
Authority
JP
Japan
Prior art keywords
gas
resistance
gas detecting
detecting unit
source voltage
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
JP9287279A
Other languages
Japanese (ja)
Other versions
JPS6133379B2 (en
Inventor
Ikuhiko Kimura
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.)
FUIGARO GIKEN KK
Figaro Engineering Inc
Original Assignee
FUIGARO GIKEN KK
Figaro Engineering Inc
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 FUIGARO GIKEN KK, Figaro Engineering Inc filed Critical FUIGARO GIKEN KK
Priority to JP9287279A priority Critical patent/JPS5616861A/en
Publication of JPS5616861A publication Critical patent/JPS5616861A/en
Publication of JPS6133379B2 publication Critical patent/JPS6133379B2/ja
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
    • G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits

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)
  • Emergency Alarm Devices (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

PURPOSE: To simplify the structure of a gas detecting unit to make it possible to obtain it at low cost, by providing a gas detecting part consisting of a resistance and a metal oxide semiconductor gas sensor, where the resistance value for gas sensing is dependent upon temperatures, a transformer for supply of heater electric power and so on, and a resistance value control part.
CONSTITUTION: A gas detecting unit is constituted by a gas detecting part provided with metal oxide semiconductor gas sensor 1, where the resistance value for gas sensing is dependent upon temperatures, and resistance 2 and 20 connected in series to gas sensor 1, heater 5 to heat gas sensor 1, transformer 6 for supply of heater electric power and so on, and control part 3 which is so constituted that resistance values of resistances 2 and 20 may be increased or reduced in the same direction as increment or reduction of the power source voltage when the power source voltage is fluctuated. As a result, change of the sensor temperature dependent upon fluctuation of the power source voltage is cancelled, and change of concentration to start the operation of alarm and so on is eliminated, and a structure suitable specially as the gas leakage alarm equipment for city gas is obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP9287279A 1979-07-21 1979-07-21 Gas detecting unit Granted JPS5616861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9287279A JPS5616861A (en) 1979-07-21 1979-07-21 Gas detecting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9287279A JPS5616861A (en) 1979-07-21 1979-07-21 Gas detecting unit

Publications (2)

Publication Number Publication Date
JPS5616861A true JPS5616861A (en) 1981-02-18
JPS6133379B2 JPS6133379B2 (en) 1986-08-01

Family

ID=14066518

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9287279A Granted JPS5616861A (en) 1979-07-21 1979-07-21 Gas detecting unit

Country Status (1)

Country Link
JP (1) JPS5616861A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59170809U (en) * 1983-04-30 1984-11-15 株式会社島津製作所 optical connector
WO2005015190A1 (en) * 2003-08-06 2005-02-17 Saia-Burgess Murten Ag Method and arrangement for detecting substances by means of regulation of an electrical resistance of a sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59170809U (en) * 1983-04-30 1984-11-15 株式会社島津製作所 optical connector
WO2005015190A1 (en) * 2003-08-06 2005-02-17 Saia-Burgess Murten Ag Method and arrangement for detecting substances by means of regulation of an electrical resistance of a sensor
CH696777A5 (en) * 2003-08-06 2007-11-30 Saia Burgess Murten Ag Arrangement and method for the detection of substances.

Also Published As

Publication number Publication date
JPS6133379B2 (en) 1986-08-01

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