Multi-gas sensor to detect simultaneously nitrogen oxides and oxygen

被引：6

作者：

Herrmann, Julia ^{[1
]}

Hagen, Gunter ^{[1
]}

Kita, Jaroslaw ^{[1
]}

Noack, Frank ^{[2
]}

Bleicker, Dirk ^{[2
]}

Moos, Ralf ^{[1
]}

机构：

[1] Univ Bayreuth, Bayreuth Engine Res Ctr BERC, Dept Funct Mat, D-95440 Bayreuth, Germany

[2] CPK Automot GmbH & Co KG, D-48157 Munster, Germany

来源：

JOURNAL OF SENSORS AND SENSOR SYSTEMS | 2020年 / 9卷 / 02期

关键词：

DOSIMETER;

D O I：

10.5194/jsss-9-327-2020

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Due to tightened emission limits, the efficiency of exhaust gas aftertreatment systems has to be further enhanced. Therefore, inexpensive and robust NOx sensors are required to be installed not only in automotive exhausts, but also in any other kind of combustion-based application. In this contribution, an impedimetric NOx sensor is presented. The impedance of a functional thick film (KMnO4, manufactured in a screenprinting technique on planar alumina substrates) depends selectively on the NOx concentration in the exhaust but shows a dependency on the oxygen concentration. Therefore, an additional temperature-independent resistive oxygen sensor structure was integrated on the same sensor platform. BFAT (BaFe0.74Al0.01Ta0.25O3 (BaFe0.74Al0.01Ta0.25O3) was used for this purpose, and the measurement was conducted in the dc resistance mode. It serves not only to determine the oxygen concentration in the exhaust, but also to correct the oxygen dependency of the NOx sensor.

引用

页码：327 / 335

页数：9

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