EP 1756560 A1 20070228 - SENSOR ELEMENT FOR DETERMINING A PHYSICAL PROPERTY OF A TEST GAS
Title (en)
SENSOR ELEMENT FOR DETERMINING A PHYSICAL PROPERTY OF A TEST GAS
Title (de)
SENSORELEMENT ZUR BESTIMMUNG EINER PHYSIKALISCHEN EIGENSCHAFT EINES MESSGASES
Title (fr)
ELEMENT CAPTEUR POUR DETERMINER UNE PROPRIETE PHYSIQUE D'UN GAZ DE MESURE
Publication
Application
Priority
- EP 2005051905 W 20050427
- DE 102004027630 A 20040605
Abstract (en)
[origin: WO2005121764A1] The invention relates to a sensor element for determining a physical property of a test gas, especially the pressure or the concentration of a gas constituent in a gas mixture, especially in the exhaust gas of an internal combustion engine, said sensor element comprising an electrode (12) which is exposed to the test gas, and a reference electrode (14) which is exposed to a reference gas, especially the surrounding atmosphere, through a porous volume (20). The two electrodes (12, 14) are separated by a solid electrolyte (111). In order to avoid the reference electrode (14) from ageing prematurely as a result of deposits of foreign substances contained in the reference gas or chemical interactions caused by the foreign substances, the volume material is selected in terms of the physical and chemical properties thereof in such a way that the foreign substances are absorbed therein (21) and/or subjected to a chemical reaction.
IPC 8 full level
G01N 27/407 (2006.01)
CPC (source: EP US)
G01N 27/4071 (2013.01 - EP US)
Citation (search report)
See references of WO 2005121764A1
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
WO 2005121764 A1 20051222; DE 102004027630 A1 20060105; EP 1756560 A1 20070228; JP 2008501941 A 20080124; JP 4691095 B2 20110601; US 2007246358 A1 20071025
DOCDB simple family (application)
EP 2005051905 W 20050427; DE 102004027630 A 20040605; EP 05743048 A 20050427; JP 2007513898 A 20050427; US 62870005 A 20050427