JPS57103047A - Method and device for detection of gas concentration - Google Patents

Method and device for detection of gas concentration

Info

Publication number
JPS57103047A
JPS57103047A JP17992380A JP17992380A JPS57103047A JP S57103047 A JPS57103047 A JP S57103047A JP 17992380 A JP17992380 A JP 17992380A JP 17992380 A JP17992380 A JP 17992380A JP S57103047 A JPS57103047 A JP S57103047A
Authority
JP
Japan
Prior art keywords
voltage
tube
power source
regulator
value
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
JP17992380A
Other languages
Japanese (ja)
Other versions
JPS6319820B2 (en
Inventor
Masayuki Uda
Fumiaki Kirihata
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.)
RIKEN Institute of Physical and Chemical Research
Original Assignee
RIKEN Institute of Physical and Chemical Research
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 RIKEN Institute of Physical and Chemical Research filed Critical RIKEN Institute of Physical and Chemical Research
Priority to JP17992380A priority Critical patent/JPS57103047A/en
Publication of JPS57103047A publication Critical patent/JPS57103047A/en
Publication of JPS6319820B2 publication Critical patent/JPS6319820B2/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
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/68—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using electric discharge to ionise a gas
    • G01N27/70—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using electric discharge to ionise a gas and measuring current or voltage

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)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Abstract

PURPOSE:To detect gas concn. with a small size and high sensitivity without the danger of gas explosion or the like by connecting a high voltage electric power source of variable voltages to an air counter tube, measuring the electric discharge start voltage of the counter tube and determining the concns. of the combustible gases included in the atmospheric air from the value thereof. CONSTITUTION:Electric current of about several KV, 10<-12>A is applied via a resistance from a high voltage electric power source 4 to an air counter tube 1 consisting of cathode 2 of a cylindrical metal of about 10mm. diameter and 50mm. length and anode 3 such as W wire of about 0.05mm. diameter. The voltage of the power source 4 is so controlled by a voltage regulator 5 as to maintain the count value of the counter tube constant. The electric discharge pulses generated in the tube 1 are amplified and shaped by an amplifier 6 and a waveform shaper 7, and these signals operate an electric discharge suppressor 8. The device 8 is connected to the cathode 2 of the tube 1. The discharge pulse signals are converted of count rates to voltage or current values with a rate meter 9, and these are compared with a reference voltage or current value in the comparator incorporated in the regulator 5 and the regulator 5 is so limited that always the reference value is attained. The discharge start voltage of the tube 1 changes by about 100V with respect to a 1vol% change in gas concn. In this way, the gas concns. are measured with good accuracy.
JP17992380A 1980-12-19 1980-12-19 Method and device for detection of gas concentration Granted JPS57103047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17992380A JPS57103047A (en) 1980-12-19 1980-12-19 Method and device for detection of gas concentration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17992380A JPS57103047A (en) 1980-12-19 1980-12-19 Method and device for detection of gas concentration

Publications (2)

Publication Number Publication Date
JPS57103047A true JPS57103047A (en) 1982-06-26
JPS6319820B2 JPS6319820B2 (en) 1988-04-25

Family

ID=16074278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17992380A Granted JPS57103047A (en) 1980-12-19 1980-12-19 Method and device for detection of gas concentration

Country Status (1)

Country Link
JP (1) JPS57103047A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002168832A (en) * 2000-11-30 2002-06-14 Fujitsu Ltd Gas detecting method and gas-concentration measuring method as well as gas sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559049A (en) * 1968-07-02 1971-01-26 Leonard N Liebermann Method and apparatus for detecting gaseous impurities in accordance with changes in spark breakdown potential caused thereby

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3559049A (en) * 1968-07-02 1971-01-26 Leonard N Liebermann Method and apparatus for detecting gaseous impurities in accordance with changes in spark breakdown potential caused thereby

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002168832A (en) * 2000-11-30 2002-06-14 Fujitsu Ltd Gas detecting method and gas-concentration measuring method as well as gas sensor

Also Published As

Publication number Publication date
JPS6319820B2 (en) 1988-04-25

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