Development of a Compact, IoT-enabled Electronic Nose for Breath Analysis

Development of a Compact, IoT-enabled Electronic Nose for Breath Analysis

Akira Tiele and James Covington

School of Engineering, University of Warwick, CV4 7AL, UK

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In this work, we report on the design and development of a compact, internet-of-things (IoT) enabled electronic nose (E-nose) for use with breath analysis. It has long been suggested that applications of diagnostic breath analysis must extend beyond laboratories and pilot studies to standard clinical practice and home-use. The latter requires a compact and portable personal diagnostic device, which can sample and analyse the exhaled breath of an individual at any time or place. While no single analysis technique can provide complete diagnosis of a patient, E-nose technology has the advantages of being relatively low-cost, low-power, user-friendly and portable. The developed unit includes an integrated sampling tube for end-tidal breath, which can be heated to body-temperature (37C), and an array of 10 MEMS metal oxide (MOX) gas sensors. The selected analogue and digital sensors are produced by 7 different manufacturers and include many of the most relevant MOX sensors currently available on the market. The unit is compact (dimensions of 7x23x16 cm) and uses a microcontroller with Wi-Fi communication capabilities, for integration with future IoT infrastructure. The device has been tested with chemical standards and exhaled breath samples from volunteers. It is our intention to deploy this system in a UK hospital in upcoming breath research studies to evaluate its potential as a non-invasive diagnostic tool.

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