ES2008009A6 - Limiting current-type sensor for polarographic measurement. - Google Patents

Limiting current-type sensor for polarographic measurement.

Info

Publication number
ES2008009A6
ES2008009A6 ES8802637A ES8802637A ES2008009A6 ES 2008009 A6 ES2008009 A6 ES 2008009A6 ES 8802637 A ES8802637 A ES 8802637A ES 8802637 A ES8802637 A ES 8802637A ES 2008009 A6 ES2008009 A6 ES 2008009A6
Authority
ES
Spain
Prior art keywords
limiting current
type sensor
sensor
diffusion
polarographic measurement
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
ES8802637A
Other languages
Spanish (es)
Inventor
Karl Hermann Friese
Hermann Dietz
Werner Grunwald
La Prieta Claude De
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of ES2008009A6 publication Critical patent/ES2008009A6/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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
    • G01N27/419—Measuring voltages or currents with a combination of oxygen pumping cells and oxygen concentration cells
    • 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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • G01N27/4071—Cells and probes with solid electrolytes for investigating or analysing gases using sensor elements of laminated structure
    • 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
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/406—Cells and probes with solid electrolytes
    • G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
    • G01N27/4071—Cells and probes with solid electrolytes for investigating or analysing gases using sensor elements of laminated structure
    • G01N27/4072—Cells and probes with solid electrolytes for investigating or analysing gases using sensor elements of laminated structure characterized by the diffusion barrier

Abstract

A limiting current-type sensor for polarographic measurement is used to determine the oxygen content of gases, in particular in exhaust gases from internal combustion engines. The sensor has an inner pump electrode (2) lodged in a tunnel (4) behind the tunnel inlet region (4'). Both Knudsen and gaseous diffusion take place in a filling (6) with diffusion channels (8, 9) in said tunnel inlet region. The diffusion channels (8, 9) create a diffusion barrier which substantially reduces the temperature and pressure dependence of the sensor.
ES8802637A 1987-08-25 1988-08-25 Limiting current-type sensor for polarographic measurement. Expired ES2008009A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3728289A DE3728289C1 (en) 1987-08-25 1987-08-25 Limit current probe working according to the polarographic measuring principle

Publications (1)

Publication Number Publication Date
ES2008009A6 true ES2008009A6 (en) 1989-07-01

Family

ID=6334421

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8802637A Expired ES2008009A6 (en) 1987-08-25 1988-08-25 Limiting current-type sensor for polarographic measurement.

Country Status (6)

Country Link
EP (1) EP0376952A1 (en)
JP (1) JPH03500085A (en)
KR (1) KR0125915B1 (en)
DE (1) DE3728289C1 (en)
ES (1) ES2008009A6 (en)
WO (1) WO1989002073A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3834987A1 (en) * 1988-10-14 1990-04-19 Bosch Gmbh Robert SENSOR ELEMENT FOR LIMIT CURRENT SENSORS FOR DETERMINING THE (LAMBDA) VALUE OF GAS MIXTURES
DE3841611A1 (en) * 1988-12-10 1990-06-13 Bosch Gmbh Robert SENSOR ELEMENT FOR LIMIT CURRENT SENSORS FOR DETERMINING THE (LAMBDA) VALUE OF GAS MIXTURES
DE4032436A1 (en) * 1990-10-12 1992-04-16 Bosch Gmbh Robert SENSOR ELEMENT FOR LIMIT CURRENT SENSORS FOR DETERMINING THE (GAMMA) VALUE OF GAS MIXTURES
DE59108491D1 (en) * 1991-09-27 1997-02-27 Siemens Ag Sensor for determining the oxygen concentration and determining the proportion of unburned fuels in the exhaust gas of an internal combustion engine
DE4231966A1 (en) * 1992-09-24 1994-03-31 Bosch Gmbh Robert Planar polarographic probe for determining the lambda value of gas mixtures
DE4313251C2 (en) * 1993-04-23 2003-03-27 Bosch Gmbh Robert Sensor element for determining the gas component concentration
DE4439901C2 (en) * 1994-11-08 1998-01-15 Bosch Gmbh Robert Electrochemical sensor for the determination of nitrogen oxides in gas mixtures
DE10013881B4 (en) * 2000-03-21 2007-01-11 Robert Bosch Gmbh Sensor element with catalytically active layer and method for producing the same
DE10013882A1 (en) * 2000-03-21 2001-10-04 Bosch Gmbh Robert Sensor element with pre-catalysis
DE102004063084A1 (en) * 2004-12-28 2006-07-06 Robert Bosch Gmbh Sensor element for a gas sensor
JP2007248357A (en) * 2006-03-17 2007-09-27 Toyota Central Res & Dev Lab Inc Gas sensor, fuel supply system using the same, and using method therefor
DE102008040175A1 (en) 2008-07-04 2010-01-07 Robert Bosch Gmbh Lambda probe with increased static accuracy
DE102009029415A1 (en) * 2009-09-14 2011-03-24 Robert Bosch Gmbh Sensor element with multipart diffusion barrier

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442444A1 (en) * 1978-11-21 1980-06-20 Thomson Csf ELECTROCHEMICAL SENSOR RELATING TO REACTIVE SPECIES CONCENTRATIONS IN A FLUID MIXTURE, AND SYSTEM COMPRISING SUCH A SENSOR, PARTICULARLY FOR REGULATION
DE2923483A1 (en) * 1979-06-09 1980-12-11 Bosch Gmbh Robert POLAROGRAPHIC PROBE FOR DETERMINING THE OXYGEN CONTENT IN GAS, ESPECIALLY IN EXHAUST GAS FROM COMBUSTION ENGINES
DE3017947A1 (en) * 1980-05-10 1981-11-12 Bosch Gmbh Robert ELECTROCHEMICAL SENSOR FOR DETERMINING THE OXYGEN CONTENT IN GAS AND METHOD FOR PRODUCING SENSOR ELEMENTS FOR SUCH SENSOR
DE3104986A1 (en) * 1981-02-12 1982-08-19 Bosch Gmbh Robert Polarographic sensor for the determination of the oxygen content of gases
DE3108305A1 (en) * 1981-03-05 1982-09-16 Bosch Gmbh Robert Polarographic sensor for determining the lambda equivalence point in exhaust gases
JPS5958356A (en) * 1982-09-28 1984-04-04 Fuji Electric Corp Res & Dev Ltd Gas analysis apparatus and its production
JPS6086457A (en) * 1983-10-19 1985-05-16 Hitachi Ltd Air fuel ratio sensor for controlling engine
JPS60173461A (en) * 1984-02-20 1985-09-06 Nissan Motor Co Ltd Oxygen sensor
US4571285A (en) * 1984-05-29 1986-02-18 Fujikura Ltd. Oxygen sensor for and method of determining concentration of oxygen
JPH065222B2 (en) * 1985-05-09 1994-01-19 日本碍子株式会社 Electrochemical device
JPH0623727B2 (en) * 1985-08-30 1994-03-30 日本碍子株式会社 Electrochemical device and method for manufacturing the same
JPH0810211B2 (en) * 1986-09-05 1996-01-31 日本碍子株式会社 Gas sensor and manufacturing method thereof

Also Published As

Publication number Publication date
KR890702024A (en) 1989-12-22
WO1989002073A1 (en) 1989-03-09
JPH03500085A (en) 1991-01-10
EP0376952A1 (en) 1990-07-11
DE3728289C1 (en) 1988-08-04
KR0125915B1 (en) 1997-12-24

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20001204