Selection of point-contact sensors for analysis of complex gas media

V. A. Gudimenko B.Verkin Institute for Low Temperature Physics & Engineering of NAS of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine.
D. A. Harbuz National Technical University “Kharkiv Polytechnic Institute”, 21, Kyrpychov Str., Kharkiv, 61002, Ukraine
A. S. Klimkin B.Verkin Institute for Low Temperature Physics & Engineering of NAS of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine.
V. L. Vakula B.Verkin Institute for Low Temperature Physics & Engineering of NAS of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine.
A. P. Pospelov National Technical University “Kharkiv Polytechnic Institute”, 21, Kyrpychov Str., Kharkiv, 61002, Ukraine
G. V. Kamarchuk B.Verkin Institute for Low Temperature Physics & Engineering of NAS of Ukraine, 47 Nauky Avenue, Kharkiv, 61103, Ukraine

Keywords: Yanson point contact spectroscopy, point contact, sensor, breath gas, cluster analysis

Abstract

The criterion for selection of point-contact sensors in the laboratory batches of samples to improve the reliability of the results in the study of complex gas media was proposed for the fi rst time. The electrical conductivity of point-contact sensors in a multicomponent gas, which was exhaled by a person, was studied. Cluster analysis method was used for selection of transducers with similar parameters in the studied sample batch of sensors. Group of samples with similar parameters of sensory images was selected on the basis of the received data. Correct application of the approach to the development of criteria for the selection of point-contact sensors was confi rmed in medical investigations of gas which was exhaled by patients.

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