CH335874A - Measuring device for electrical smoke gas detectors - Google Patents

Measuring device for electrical smoke gas detectors

Info

Publication number
CH335874A
CH335874A CH335874DA CH335874A CH 335874 A CH335874 A CH 335874A CH 335874D A CH335874D A CH 335874DA CH 335874 A CH335874 A CH 335874A
Authority
CH
Switzerland
Prior art keywords
measuring device
smoke gas
gas detectors
electrical smoke
electrical
Prior art date
Application number
Other languages
German (de)
Inventor
Haffner Paul Dipl-El-Ing
Original Assignee
Landis & Gyr Ag
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 Landis & Gyr Ag filed Critical Landis & Gyr Ag
Publication of CH335874A publication Critical patent/CH335874A/en

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
    • G01N27/18—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 changes in the thermal conductivity of a surrounding material to be tested
    • G01N27/185—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 changes in the thermal conductivity of a surrounding material to be tested using a catharometer

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)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
CH335874D 1955-11-09 1955-11-09 Measuring device for electrical smoke gas detectors CH335874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH818761X 1955-11-09

Publications (1)

Publication Number Publication Date
CH335874A true CH335874A (en) 1959-01-31

Family

ID=4539195

Family Applications (1)

Application Number Title Priority Date Filing Date
CH335874D CH335874A (en) 1955-11-09 1955-11-09 Measuring device for electrical smoke gas detectors

Country Status (6)

Country Link
BE (1) BE552420A (en)
CH (1) CH335874A (en)
DE (1) DE1092698B (en)
FR (1) FR1167064A (en)
GB (1) GB818761A (en)
NL (1) NL113323C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106088A (en) * 1960-04-25 1963-10-08 Du Pont Shielded resistor
USRE30105E (en) * 1974-11-15 1979-10-02 Fluid measuring apparatus
DE10119788C2 (en) 2001-04-23 2003-08-07 Siemens Ag thermal conductivity detector

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT134963B (en) * 1931-01-27 1933-10-25 Siemens Ag Device for gas analysis by measuring the thermal conductivity, especially for flue gases.
US2585959A (en) * 1949-01-24 1952-02-19 Minter Instr Corp Thermal conductivity bridge for gas analysis

Also Published As

Publication number Publication date
BE552420A (en)
NL113323C (en)
DE1092698B (en) 1960-11-10
FR1167064A (en) 1958-11-20
GB818761A (en) 1959-08-19

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