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Proceedings 2017, 1(4), 589; doi:10.3390/proceedings1040589

Low Cost Optical Electronic Nose for Biomedical Applications

School of Engineering, University of Warwick, Coventry CV4 7AL, UK
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 16 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
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Here we report on the development of a Non-Dispersive Infrared Sensor (NDIR) optical electronic nose, which we intend to target towards healthcare applications. Our innovative electronic nose uses an array of four different tuneable infra-red detectors to analyse the gas/volatile content of a sample under test. The instrument has the facility to scan a range of wavelengths from 3.1 μm and 10.5 μm with a step size of 20 nm. The use of a tuneable filter, instead of expensive lasers, reduces the overall cost of the system. We have tested our instrument to a range of gases and vapours and our electronic nose is able to detect, for example, methane down to single figure ppm at two different wavelengths. It is also able to discriminate between complex odours, here we present the results from 6 different chemicals. In this case, fixed frequency measurements were used as “virtual sensors” and their output then analysed by (PCA), which for all but one case, showed good separation.
Keywords: electronic nose; gas sensors; tunable optical sensor; infrared sensor; volatile organic compounds; artificial nose; medical diagnostics electronic nose; gas sensors; tunable optical sensor; infrared sensor; volatile organic compounds; artificial nose; medical diagnostics
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Esfahani, S.; Covington, J.A. Low Cost Optical Electronic Nose for Biomedical Applications. Proceedings 2017, 1, 589.

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