FR2456950A1 - Catharometre - Google Patents

Catharometre

Info

Publication number
FR2456950A1
FR2456950A1 FR7912148A FR7912148A FR2456950A1 FR 2456950 A1 FR2456950 A1 FR 2456950A1 FR 7912148 A FR7912148 A FR 7912148A FR 7912148 A FR7912148 A FR 7912148A FR 2456950 A1 FR2456950 A1 FR 2456950A1
Authority
FR
France
Prior art keywords
filament
thermal conductivity
cell
operates
voltage change
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.)
Pending
Application number
FR7912148A
Other languages
English (en)
Inventor
Thijbert De Paepe
Philippe Tempe
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.)
Sereg SA
Original Assignee
Sereg SA
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 Sereg SA filed Critical Sereg SA
Priority to FR7912148A priority Critical patent/FR2456950A1/fr
Publication of FR2456950A1 publication Critical patent/FR2456950A1/fr
Pending 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
    • G01N27/18—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

Abstract

LA PRESENTE INVENTION CONCERNE LES CATHAROMETRES. LE CATHAROMETRE SE CARACTERISE ESSENTIELLEMENT PAR LE FAIT QU'IL COMPORTE AU MOINS UN FILAMENT RESISTANT CHAUFFE PAR EFFET JOULE ET DES MOYENS POUR MAINTENIR SA TEMPERATURE SUR UN POINT D'EQUILIBRE QUELLE QUE SOIT LA VALEUR DE LA CONDUCTIBILITE THERMIQUE DU FLUIDE BAIGNANT LEDIT FILAMENT. APPLICATION A LA MESURE DES DEBITS, A L'ANALYSE, ETC.
FR7912148A 1979-05-14 1979-05-14 Catharometre Pending FR2456950A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7912148A FR2456950A1 (fr) 1979-05-14 1979-05-14 Catharometre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7912148A FR2456950A1 (fr) 1979-05-14 1979-05-14 Catharometre

Publications (1)

Publication Number Publication Date
FR2456950A1 true FR2456950A1 (fr) 1980-12-12

Family

ID=9225412

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912148A Pending FR2456950A1 (fr) 1979-05-14 1979-05-14 Catharometre

Country Status (1)

Country Link
FR (1) FR2456950A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4817414A (en) * 1986-07-03 1989-04-04 Dragerwerk Aktiengesellschaft Measuring arrangement for detecting the level of combustible gases mixed with air
EP1050756A2 (fr) * 1999-05-07 2000-11-08 ThermoQuest Italia S.p.A. Appareil pour mesurer la conductivité thermique d'un fluide

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1143002A (en) * 1965-09-08 1969-02-19 Servomex Controls Ltd Improvements in or relating to wheatstone bridge circuit arrangements
US3470355A (en) * 1966-07-29 1969-09-30 Perkin Elmer Corp Filament protection for hot wire detectors
DE2229464A1 (de) * 1971-06-16 1972-12-21 Ici Ltd Schaltungsanordnung zum Nachweis der Wärmeleitfähigkeit sowie deren Verwendung
DE2209413A1 (de) * 1972-02-28 1973-09-06 Helmut Dipl Chem Ulrich Verfahren bzw. einrichtung zur messung physikalischer groessen, beispielsweise von temperatur oder strahlung oder stroemungsmenge oder waermeleitfaehigkeit, mittels temperaturabhaengiger, von einem elektrischen strom durchflossener messwiderstaende
US3864959A (en) * 1971-12-16 1975-02-11 Pye Ltd Thermal conductivity detector apparatus
DE2540254A1 (de) * 1975-09-10 1977-03-17 Bodenseewerk Perkin Elmer Co Waermeleitfaehigkeitsdetektor-anordnung
DE2710473A1 (de) * 1976-03-11 1977-09-15 Rosemount Eng Co Ltd Schaltungsanordnung zur bestimmung der waermeverlustgeschwindigkeit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1143002A (en) * 1965-09-08 1969-02-19 Servomex Controls Ltd Improvements in or relating to wheatstone bridge circuit arrangements
US3470355A (en) * 1966-07-29 1969-09-30 Perkin Elmer Corp Filament protection for hot wire detectors
DE2229464A1 (de) * 1971-06-16 1972-12-21 Ici Ltd Schaltungsanordnung zum Nachweis der Wärmeleitfähigkeit sowie deren Verwendung
US3864959A (en) * 1971-12-16 1975-02-11 Pye Ltd Thermal conductivity detector apparatus
DE2209413A1 (de) * 1972-02-28 1973-09-06 Helmut Dipl Chem Ulrich Verfahren bzw. einrichtung zur messung physikalischer groessen, beispielsweise von temperatur oder strahlung oder stroemungsmenge oder waermeleitfaehigkeit, mittels temperaturabhaengiger, von einem elektrischen strom durchflossener messwiderstaende
DE2540254A1 (de) * 1975-09-10 1977-03-17 Bodenseewerk Perkin Elmer Co Waermeleitfaehigkeitsdetektor-anordnung
DE2710473A1 (de) * 1976-03-11 1977-09-15 Rosemount Eng Co Ltd Schaltungsanordnung zur bestimmung der waermeverlustgeschwindigkeit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4817414A (en) * 1986-07-03 1989-04-04 Dragerwerk Aktiengesellschaft Measuring arrangement for detecting the level of combustible gases mixed with air
EP1050756A2 (fr) * 1999-05-07 2000-11-08 ThermoQuest Italia S.p.A. Appareil pour mesurer la conductivité thermique d'un fluide
EP1050756A3 (fr) * 1999-05-07 2001-10-24 ThermoQuest Italia S.p.A. Appareil pour mesurer la conductivité thermique d'un fluide
US6361204B1 (en) 1999-05-07 2002-03-26 Thermoquest Italia S.P.A. Device for measuring the thermal conductivity of a fluid

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