FR2330005A1 - Continuous monitoring of vapour in air - involves using electron capture detector followed by universal detector and logic circuits - Google Patents

Continuous monitoring of vapour in air - involves using electron capture detector followed by universal detector and logic circuits

Info

Publication number
FR2330005A1
FR2330005A1 FR7619210A FR7619210A FR2330005A1 FR 2330005 A1 FR2330005 A1 FR 2330005A1 FR 7619210 A FR7619210 A FR 7619210A FR 7619210 A FR7619210 A FR 7619210A FR 2330005 A1 FR2330005 A1 FR 2330005A1
Authority
FR
France
Prior art keywords
detector
vapour
air
electron capture
universal
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.)
Withdrawn
Application number
FR7619210A
Other languages
French (fr)
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.)
Marsland Engineering Ltd
Original Assignee
Marsland Engineering 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
Application filed by Marsland Engineering Ltd filed Critical Marsland Engineering Ltd
Publication of FR2330005A1 publication Critical patent/FR2330005A1/en
Withdrawn legal-status Critical Current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
    • G01N27/64—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 wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66—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 wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
    • 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
    • G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
    • 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
    • G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
    • G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means

Abstract

The method described is appliable to the continuous monitoring of a specific vapour, having a given electron capture coefficient, in a sample of air. A semi-permeable membrane is used to separate the vapour from the air. The vapour is then mixed with a carrier gas, either argon or helium, and it is passed into an electron capture detector and a universal detector. The electrical signals produced by these detectors are amplified separately and compared with threshhold levels. In this way binary signals are produced with arc applied to a logic circuit. The universal detector may be an argon ion detector, a helium ion detector, a hyper-frequency plasma emission detector, thermal conductivity detector, a photoionisation detector, etc..
FR7619210A 1975-10-27 1976-06-24 Continuous monitoring of vapour in air - involves using electron capture detector followed by universal detector and logic circuits Withdrawn FR2330005A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA238393 1975-10-27

Publications (1)

Publication Number Publication Date
FR2330005A1 true FR2330005A1 (en) 1977-05-27

Family

ID=4104368

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7619210A Withdrawn FR2330005A1 (en) 1975-10-27 1976-06-24 Continuous monitoring of vapour in air - involves using electron capture detector followed by universal detector and logic circuits

Country Status (7)

Country Link
JP (1) JPS5255590A (en)
BE (1) BE843216A (en)
FR (1) FR2330005A1 (en)
IL (1) IL49071A0 (en)
IT (1) IT1109601B (en)
NL (1) NL7604020A (en)
SE (1) SE7601742L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989011653A1 (en) * 1988-05-16 1989-11-30 Wessex Instruments Ltd. Combustible gas detectors
GB2290871A (en) * 1994-06-18 1996-01-10 Robert Gittins An instrument for measuring ethyl alcohol vapour in breath
WO1999002981A1 (en) * 1997-07-07 1999-01-21 Aktsionernoe Obschestvo Otkrytogo Tipa 'institut Prikladnoi Fiziki' Analytic head for detecting vapours of explosive substances
GB2533386B (en) * 2014-12-18 2019-09-11 Smiths Detection Watford Ltd A detection apparatus with pneumatic interface

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989011653A1 (en) * 1988-05-16 1989-11-30 Wessex Instruments Ltd. Combustible gas detectors
GB2290871A (en) * 1994-06-18 1996-01-10 Robert Gittins An instrument for measuring ethyl alcohol vapour in breath
WO1999002981A1 (en) * 1997-07-07 1999-01-21 Aktsionernoe Obschestvo Otkrytogo Tipa 'institut Prikladnoi Fiziki' Analytic head for detecting vapours of explosive substances
GB2533386B (en) * 2014-12-18 2019-09-11 Smiths Detection Watford Ltd A detection apparatus with pneumatic interface
US10695760B2 (en) 2014-12-18 2020-06-30 Smiths Detection-Watford Limited Apparatus and method

Also Published As

Publication number Publication date
BE843216A (en) 1976-12-21
IT1109601B (en) 1985-12-23
JPS5255590A (en) 1977-05-07
SE7601742L (en) 1977-04-28
IL49071A0 (en) 1976-04-30
NL7604020A (en) 1977-04-29

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Legal Events

Date Code Title Description
ST Notification of lapse