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A new approach to selective detection of gas by an SnO2 solid-state sensor

Abstract : Tin dioxide (SnO2) is sensitized for different gaseous compounds by heating at 500°C in an SO2--air mixtures. Such treatment induces strong modifications of the electrical properties of SnO2 and constitutes an attempt to solve the problem of selectivity for chemical sensors. According to the nature of the surrounding gas, the electrical conductance curves as a function of the temperature present a maximum at different temperatures: 400 °C with C6H6 and 100°C with H2S. These maxima, whose values are related to the gas concentration, can be used for selective gas detection. A benzene detector device using two sensors heated to 400 and 500°C respectively selectivity for a large number of gaseous compounds.
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https://hal-emse.ccsd.cnrs.fr/emse-00433410
Contributor : Andrée-Aimée Toucas <>
Submitted on : Thursday, November 19, 2009 - 11:34:57 AM
Last modification on : Wednesday, June 24, 2020 - 4:18:18 PM

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René Lalauze, Christophe Pijolat. A new approach to selective detection of gas by an SnO2 solid-state sensor. Sensors and Actuators, Elsevier, 1984, 5 (1), pp.55-63. ⟨10.1016/0250-6874(84)87006-7⟩. ⟨emse-00433410⟩

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