Global Patent Index - EP 2531835 A1

EP 2531835 A1 20121212 - OPTICAL GAS SENSOR

Title (en)

OPTICAL GAS SENSOR

Title (de)

OPTISCHER GASSENSOR

Title (fr)

CAPTEUR DE GAZ OPTIQUE

Publication

EP 2531835 A1 20121212 (DE)

Application

EP 10795002 A 20101220

Priority

  • DE 102010001443 A 20100201
  • EP 2010070265 W 20101220

Abstract (en)

[origin: WO2011091912A1] The invention relates to a gas sensor for determining the concentration of one or more gas species, in particular in the exhaust gas of an internal combustion engine, comprising a measuring cell (1) having a gas inlet (I), a gas outlet (II), a catalysis region (K1) and an analysis region (A1), wherein the catalysis region (K1) is disposed on the gas inlet side of the analysis region (A1), a catalyst (2) for catalysing a reaction of a first gas species to form a second gas species in the catalysis region (K1), and a gas analyser (3) for the spectroscopic measurement of the concentration of the second gas species in the analysis region (A1). A first gas species, the absorption and/or scatter wavelength(s) of which lie outside of the emission wavelength range of currently available semiconductor radiation sources, for example nitrogen monoxide or ammonia, can be converted by the catalyst (2) into a second gas species, for example nitrogen dioxide, the absorption and/or scatter wavelength(s)of which lie within the emission wavelength range of currently available semiconductor radiator sources, so that the gas analyser can have a semiconductor radiation source. The invention also relates to a method for determining the concentration of one or more gas species, in particular in the exhaust gas of an internal combustion engine.

IPC 8 full level

G01N 21/31 (2006.01); G01N 33/00 (2006.01)

CPC (source: EP US)

G01N 21/3504 (2013.01 - EP US); G01N 33/0013 (2013.01 - EP US); G01N 2201/0612 (2013.01 - EP US); G01N 2201/062 (2013.01 - EP US)

Citation (search report)

See references of WO 2011091912A1

Citation (examination)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

DE 102010001443 A1 20110804; CN 102713568 A 20121003; CN 102713568 B 20160302; EP 2531835 A1 20121212; US 2013045541 A1 20130221; WO 2011091912 A1 20110804

DOCDB simple family (application)

DE 102010001443 A 20100201; CN 201080062835 A 20101220; EP 10795002 A 20101220; EP 2010070265 W 20101220; US 201013576438 A 20101220