GB1405603A - Devices for indicating the concentration of an oxidisable gas contained in air - Google Patents

Devices for indicating the concentration of an oxidisable gas contained in air

Info

Publication number
GB1405603A
GB1405603A GB5463572A GB5463572A GB1405603A GB 1405603 A GB1405603 A GB 1405603A GB 5463572 A GB5463572 A GB 5463572A GB 5463572 A GB5463572 A GB 5463572A GB 1405603 A GB1405603 A GB 1405603A
Authority
GB
United Kingdom
Prior art keywords
resistor
bridge
concentration
gas
meter
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
GB5463572A
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.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft GmbH
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
Priority claimed from DE19712159566 external-priority patent/DE2159566C3/en
Application filed by Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Publication of GB1405603A publication Critical patent/GB1405603A/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
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas

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 Electric Means (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

1405603 Measuring gas concentration electrically AUERGESELLSCHAFT GmbH 27 Nov 1972 [26 Nov 1971] 54635/72 Heading G1N Apparatus for determining the concentration of oxidizable gas in air comprises a Wheatstone bridge containing a catalytic type temperaturesensitive resistor 1, Fig. 1, and a temperature compensating resistor 2. If the test gas is sufficiently concentrated to result in incomplete oxidation, the conductivity of the gas in the test chamber 5 is such as to lower the temperature and resistance of resistor 2 sufficiently to operate a switch 6 whereby the unbalance current S is augumented by a current which holds the apparatus meter at full deflection. The switch 6 may alternatively introduce an additional resistor in the bridge circuit Fig. 1, to obtain full scale deflection of the meter, or switch the meter from the first bridge to a second bridge. In another embodiment, resistor 2 is incorporated in a second bridge network whose output current S is added to the unbalance current S.
GB5463572A 1971-11-26 1972-11-27 Devices for indicating the concentration of an oxidisable gas contained in air Expired GB1405603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712159566 DE2159566C3 (en) 1971-11-26 Device for suppressing the decrease in display caused by incomplete oxidation at high concentrations in a device for displaying the concentration of an oxidizable gas contained in air

Publications (1)

Publication Number Publication Date
GB1405603A true GB1405603A (en) 1975-09-10

Family

ID=5826707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5463572A Expired GB1405603A (en) 1971-11-26 1972-11-27 Devices for indicating the concentration of an oxidisable gas contained in air

Country Status (1)

Country Link
GB (1) GB1405603A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854155A (en) * 1988-10-19 1989-08-08 Mine Safety Appliances Company Combustible gas detector having catalytic sensor stabilizing network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854155A (en) * 1988-10-19 1989-08-08 Mine Safety Appliances Company Combustible gas detector having catalytic sensor stabilizing network

Also Published As

Publication number Publication date
DE2159566B2 (en) 1975-11-13
DE2159566A1 (en) 1973-05-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCPE Delete 'patent ceased' from journal

Free format text: 4922,PAGE 2129

PCNP Patent ceased through non-payment of renewal fee