GB857631A - Method and apparatus for gas detection - Google Patents

Method and apparatus for gas detection

Info

Publication number
GB857631A
GB857631A GB5044/59A GB504459A GB857631A GB 857631 A GB857631 A GB 857631A GB 5044/59 A GB5044/59 A GB 5044/59A GB 504459 A GB504459 A GB 504459A GB 857631 A GB857631 A GB 857631A
Authority
GB
United Kingdom
Prior art keywords
gas
negative
electro
oxygen
hydrogen
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.)
Expired
Application number
GB5044/59A
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.)
MSA Safety Inc
Original Assignee
Mine Safety Appliances Co
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 Mine Safety Appliances Co filed Critical Mine Safety Appliances Co
Publication of GB857631A publication Critical patent/GB857631A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62Investigating 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
    • G01N27/64Investigating 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 wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66Investigating 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 wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Toxicology (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)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

857,631. Determining physical qualities of gases. MINE SAFETY APPLIANCES CO. Feb. 13, 1959 [Feb. 19, 1958], No. 5044/59. Class 37 A method of detecting the presence of an electro-negative gas contaminant in a mixture with a non electro-negative gas comprises ionising a moving stream of the gaseous mixture and subjecting it to electric field the electron current flow being compared with that produced under the same conditions by the non electro-negative gas alone. Fig. 1 shows an apparatus for testing the presence of traces of electro-negative oxygen gas in otherwise pure non electro-negative hydrogen. The pure hydrogen gas is passed through a detector chamber 1 having inner electrode 8 and outer electrode 2, the gas being ionised by the presence of an alpha radiation source 9, for example radium, inside the tube. The current flow between electrodes 2, 8 is detected in a Wheatstone bridge circuit which may for example be brought to a null condition by adjustment of potentiometer 16. A predetermined quantity of oxygen gas is then mixed with the hydrogen and passed through the detector chamber 1 and the change in current flow between electrodes 2 and 8 is detected. In order to compensate for changes in the ambient conditions, or the presence of contaminant gases other than oxygen, the resistor 15 may be replaced by a second chamber connected either in parallel or series for gas flow with the chamber 1, Figs. 2 and 3 (not shown). An oxygen filter is then placed before one of the chambers so that oxygen is extracted from the gas passing through one only of the chambers and the difference in electron current flow between the two chambers is measured. The gas contaminant to be detected may be oxygen, hydrogen chloride, sulphur dioxide, carbon monoxide or chlorine and the carrier gas may be hydrogen, helium, neon, argon, nitrogen, ethylene acetylene or paraffin hydrocarbon. The contaminant gas may consist of a mixture of any two or more electro-negative gases and likewise the carrier gas may be a mixture of two or more non electro-negative gases.
GB5044/59A 1958-02-19 1959-02-13 Method and apparatus for gas detection Expired GB857631A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US716165A US3009097A (en) 1958-02-19 1958-02-19 Method of oxygen detection

Publications (1)

Publication Number Publication Date
GB857631A true GB857631A (en) 1961-01-04

Family

ID=24877017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5044/59A Expired GB857631A (en) 1958-02-19 1959-02-13 Method and apparatus for gas detection

Country Status (4)

Country Link
US (1) US3009097A (en)
DE (1) DE1088254B (en)
FR (1) FR1220332A (en)
GB (1) GB857631A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL125640C (en) * 1960-06-27
US3255348A (en) * 1962-12-28 1966-06-07 Lion Res Corp Ionization-crack fluid analyzer
US3892968A (en) * 1971-08-06 1975-07-01 James Ephraim Lovelock Electron capture detector systems
DE2407940C2 (en) * 1973-02-28 1983-04-21 Mine Safety Appliances Co., 15235 Pittsburgh, Pa. Device for the simultaneous measurement of the content of different combustible components of a gas sample
US4288749A (en) * 1979-04-26 1981-09-08 Generale De Fluide Method and apparatus for measuring oxygen concentration
US5760291A (en) * 1996-09-03 1998-06-02 Hewlett-Packard Co. Method and apparatus for mixing column effluent and make-up gas in an electron capture detector
FR3104721B1 (en) * 2019-12-17 2021-12-24 Rubix S&I Device and method for identifying a gas mixture

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH199517A (en) * 1936-12-02 1938-08-31 C Jaeger Walter Method and device for displaying the state of a gas.
US2465377A (en) * 1938-11-24 1949-03-29 Banque Pour Entpr S Electr Gas-sensing control means with gas-discharge device
US2497213A (en) * 1945-05-22 1950-02-14 Nat Res Corp Pressure gauge
US2761976A (en) * 1951-04-17 1956-09-04 Illinois Testing Laboratories Methods and apparatus for measuring quantitatively the amount of gas in a mixture
US2742574A (en) * 1951-12-12 1956-04-17 Socony Mobil Oil Co Inc Method for detection of hydrocarbons
US2739283A (en) * 1952-02-23 1956-03-20 Nat Res Corp High-vacuum device
US2770772A (en) * 1952-07-29 1956-11-13 Int Standard Electric Corp Detection of leaks in vacuum apparatus
US2740894A (en) * 1952-10-21 1956-04-03 Research Corp Rapid gas analyser
US2820946A (en) * 1954-02-01 1958-01-21 Cons Electrodynamics Corp Apparatus for leak detection and pressure measurement

Also Published As

Publication number Publication date
DE1088254B (en) 1960-09-01
US3009097A (en) 1961-11-14
FR1220332A (en) 1960-05-24

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