Influence of the Gas Velocity on the Temperature Homogeneity of Transducers for Gas Sensors

Titelangaben

Herrmann, Julia ; Kern, Thomas ; Hagen, Gunter ; Moos, Ralf:
Influence of the Gas Velocity on the Temperature Homogeneity of Transducers for Gas Sensors.
2021
Veranstaltung: SMSI Sensor and Measurement Science International , Virtual Conference , 03-06 May 2021 , Nuremberg, Germany.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Vortrag )
DOI: https://doi.org/10.5162/SMSI2021/B7.2

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Abstract

High-temperature gas sensors need homogeneous heating in the functional sensing area. Varying gas flow characteristics lead to cross-effects and signal instability. Utilizing a special sensor transducer, these effects can be proven experimentally. FEM modelling further supports the understanding. Proper protection caps solve cross-sensitivity problems but also cause decreasing sensor response.