COMPARATIVE INVESTIGATIONS OF TWO KIND OF ELECTRONIC CIRCUIT FOR MULTICHANNEL SAW-BASED GAS SENSORS

Henryk Urzedniczok

Abstract

Gas sensors based on surface acoustic wave transducer equipped with two types of primary electronic circuit, oscillatory circuit and a circuit of phase shift detection, are described. Modal character of oscillatory circuit is analyzed, and consequence of this fact are discussed. Results of investigations for this type of circuit are presented. A conception of SAW transducer with phase shift detection is proposed, a simple electronic circuit for this method is described and results of investigations are presented.

Keywords

gas sensor, conditioning circuit, surface acoustic wave

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IMEKO-WC-2009-TC19-581.pdf

DOI

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IMEKO TC

TC19 - Environmental Measurements

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