Verification of a logarithmic model for estimation of gas concentrations in a mixture for a tin oxide gas sensor response

被引：15

作者：

Hirobayashi, S ^{[1
]}

Kadir, MA ^{[1
]}

Yoshizawa, T ^{[1
]}

Yamabuchi, T ^{[1
]}

机构：

[1] Toyama Univ, Fac Technol, Gofuku, Toyama 9308555, Japan

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 92卷 / 03期

关键词：

gas concentration; gas sensor; indoor-air pollutants; gas mixture;

D O I：

10.1016/S0925-4005(03)00311-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Changes in electrical conductivity due to a reaction occurring between the original adsorbents and the gases present in the surrounding atmosphere were measured for a tin dioxide-based gas sensor. In this study, a model of the gas sensor response using a relationship between the gas concentration in a mixture and the sensor resistance is proposed. The values of coefficients are determined by a least-squares fit of measured data. Using two gas sensors having different characteristics, the concentrations of gases in a mixture can be evaluated. The proposed method has been applied to the evaluation of the gas concentrations in ammonia-ethanol and CO-ethanol mixtures. Furthermore, we verified our model for a gas mixture of carbon monoxide, propane and methane gases, namely for a three-gas system. The results of the present study indicated that the evaluation of gas concentrations in a mixture is feasible using the proposed model of gas sensor response, which can be used as an inexpensive monitor for air pollution. (C) 2003 Published by Elsevier Science B.V.

引用

页码：269 / 278

页数：10

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