GB1557921A - Gas monitors - Google Patents

Gas monitors

Info

Publication number
GB1557921A
GB1557921A GB779/77A GB77977A GB1557921A GB 1557921 A GB1557921 A GB 1557921A GB 779/77 A GB779/77 A GB 779/77A GB 77977 A GB77977 A GB 77977A GB 1557921 A GB1557921 A GB 1557921A
Authority
GB
United Kingdom
Prior art keywords
gas monitors
monitors
gas
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
GB779/77A
Other languages
English (en)
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Priority to GB779/77A priority Critical patent/GB1557921A/en
Priority to US05/859,522 priority patent/US4185491A/en
Priority to NL7800036A priority patent/NL7800036A/xx
Priority to BE184174A priority patent/BE862723A/xx
Priority to DE19782800683 priority patent/DE2800683A1/de
Priority to JP148678A priority patent/JPS5389495A/ja
Priority to FR7800533A priority patent/FR2377035A1/fr
Publication of GB1557921A publication Critical patent/GB1557921A/en
Expired 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
    • G01N27/123—Circuits particularly adapted therefor, e.g. linearising circuits for controlling the temperature
    • G01N27/124—Circuits particularly adapted therefor, e.g. linearising circuits for controlling the temperature varying the temperature, e.g. in a cyclic manner

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)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
GB779/77A 1977-01-10 1977-01-10 Gas monitors Expired GB1557921A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB779/77A GB1557921A (en) 1977-01-10 1977-01-10 Gas monitors
US05/859,522 US4185491A (en) 1977-01-10 1977-12-12 Gas monitors
NL7800036A NL7800036A (nl) 1977-01-10 1978-01-02 Gasmonitor.
BE184174A BE862723A (fr) 1977-01-10 1978-01-06 Perfectionnements aux moniteurs de gaz
DE19782800683 DE2800683A1 (de) 1977-01-10 1978-01-09 Gas-ueberwachungsvorrichtung
JP148678A JPS5389495A (en) 1977-01-10 1978-01-10 Gas sensor
FR7800533A FR2377035A1 (fr) 1977-01-10 1978-01-10 Detecteur de gaz du type a semi-conducteur chauffe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB779/77A GB1557921A (en) 1977-01-10 1977-01-10 Gas monitors

Publications (1)

Publication Number Publication Date
GB1557921A true GB1557921A (en) 1979-12-19

Family

ID=9710373

Family Applications (1)

Application Number Title Priority Date Filing Date
GB779/77A Expired GB1557921A (en) 1977-01-10 1977-01-10 Gas monitors

Country Status (7)

Country Link
US (1) US4185491A ( )
JP (1) JPS5389495A ( )
BE (1) BE862723A ( )
DE (1) DE2800683A1 ( )
FR (1) FR2377035A1 ( )
GB (1) GB1557921A ( )
NL (1) NL7800036A ( )

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3019387C2 (de) * 1980-05-21 1986-01-23 Siemens AG, 1000 Berlin und 8000 München Dünnschicht-Halbleiter-Gassensor mit einem in den Sensoraufbau integrierten Heizelement
US4351181A (en) * 1980-10-17 1982-09-28 Currans James H Linear, gas to voltage transducer circuit
US4458242A (en) * 1980-10-25 1984-07-03 Matsushita Electric Works, Ltd. Gas detector
US4327361A (en) * 1980-11-06 1982-04-27 The United States Of America As Represented By The Secretary Of The Army Gas sensor
US4502321A (en) * 1981-02-27 1985-03-05 Capital Controls Apparatus and method for measuring the concentration of gases
US4352087A (en) * 1981-04-22 1982-09-28 Marie C. Kercheval Fume detector and alarm system
EP0075101A3 (de) * 1981-09-22 1985-12-04 Cerberus Ag Verfahren und Vorrichtung zur Reduzierung von durch Störgase hervorgerufenen Falschalarmen in Gaswarnanlagen
US4691979A (en) * 1983-08-04 1987-09-08 Manda R & D Compliant press-fit electrical contact
DE3435874A1 (de) * 1984-09-29 1986-04-03 Horst Dipl.-Ing. 2000 Hamburg Krauleidies Verfahren und anordnung zur ueberwachung der fremdgaskonzentration in einem gasfoermigen traegermedium
JPS6244252U ( ) * 1985-09-04 1987-03-17
US4785658A (en) * 1985-12-02 1988-11-22 John Jackson Method and apparatus for sensing hydrocarbon gases
US4896143A (en) * 1987-04-24 1990-01-23 Quantum Group, Inc. Gas concentration sensor with dose monitoring
US4918974A (en) * 1989-02-06 1990-04-24 Alcan International Limited Method and apparatus for the measurement of the thermal conductivity of gases
US5081869A (en) * 1989-02-06 1992-01-21 Alcan International Limited Method and apparatus for the measurement of the thermal conductivity of gases
FR2651038B1 (fr) * 1989-08-21 1991-10-31 Capsor Detecteur de gaz explosifs mettant en oeuvre une cellule a coefficient de temperature negatif
US6166356A (en) * 1999-04-19 2000-12-26 Hewlett-Packard Temperature monitoring system
US7604478B2 (en) * 2005-03-21 2009-10-20 Honeywell International Inc. Vapor resistant fuel burning appliance
DE102014000343A1 (de) 2014-01-11 2015-07-16 Dräger Safety AG & Co. KGaA Gasmessgerät
US10054534B1 (en) * 2015-07-08 2018-08-21 Airviz Inc. Group calibration of environmental sensors

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695848A (en) * 1970-04-07 1972-10-03 Naoyoshi Taguchi Gas detecting device
GB1374575A (en) * 1970-08-26 1974-11-20 Nat Res Dev Semiconducting gas-sensitive devices
US3877291A (en) * 1972-08-15 1975-04-15 Borg Warner Portable breath tester
GB1451231A (en) * 1973-03-30 1976-09-29 Nat Res Dev Gas sensitive devices
FR2239683B2 ( ) * 1973-08-03 1978-01-27 Nohmi Bosai Kogyo Co Ltd
NL7313897A (nl) * 1973-10-10 1975-04-14 Visser Robertus Gerardus Gasindicator.
US3906473A (en) * 1974-03-08 1975-09-16 Ross Inc Will Method and apparatus for operating a gas sensor
BE819872A (fr) * 1974-09-13 1974-12-31 Procede et dispositif pour determiner la proportion d'un ou de plusieurs composants dans un melange gazeux.
US3950739A (en) * 1974-10-30 1976-04-13 Campman James P Detector for detecting and locating the source of a contaminating gas or smoke in the atmosphere
US4000650B1 (en) * 1975-03-20 1995-11-14 Endress Hauser Gmbh Co Method and apparatus for ultrasonic material level measurement

Also Published As

Publication number Publication date
FR2377035B1 ( ) 1983-04-08
NL7800036A (nl) 1978-07-12
FR2377035A1 (fr) 1978-08-04
BE862723A (fr) 1978-05-02
JPS5389495A (en) 1978-08-07
DE2800683A1 (de) 1978-07-20
US4185491A (en) 1980-01-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee