Ozone sensors based on WO3:: a model for sensor drift and a measurement correction method

被引：49
|
作者：
Aliwell, SR
Halsall, JF
Pratt, KFE
O'Sullivan, J
Jones, RL
Cox, RA
Utembe, SR
Hansford, GM
Williams, DE
机构：
[1] UCL, Dept Chem, London WC1H 0AJ, England
[2] Capteur Sensors Ltd, Didcot OX11 7HP, Oxon, England
[3] Univ Cambridge, Dept Chem, Ctr Atmospher Sci, Cambridge CB2 1EW, England
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2001年 / 12卷 / 06期
关键词：
gas-sensitive resistors; tungstic oxide; ozone sensor; drift;
D O I：
10.1088/0957-0233/12/6/305
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The use of a tungstic oxide semiconductor as a sensor for ozone at concentration levels relevant to atmospheric monitoring applications is an important advance in attempts to produce cheap, lightweight and reliable instruments. Problems of stability are a possible obstacle to this application. A model that describes the response of these sensors to ozone is proposed here and using it an explanation for the drift of resistance with time at constant concentrations of ozone is given. Consideration of this drift model enables a measurement routine to be employed that compensates for the drift observed experimentally, thus producing a reliable calibration of the sensor.
引用
收藏
页码：684 / 690
页数：7
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