Portable exhaled breath analyzer employing fluctuation-enhanced gas sensing method in resistive gas sensors - Publikacja - MOST Wiedzy

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Portable exhaled breath analyzer employing fluctuation-enhanced gas sensing method in resistive gas sensors

Abstrakt

This paper presents a portable exhaled breath analyser, developed to detect selected diseases. The set-up employs resistive gas sensors: commercial MEMS sensors and prototype gas sensors made of WO3 gas sensing layers doped with various metal ingredients. The set-up can modulate the gas sensors by applying UV light to induce physical changes of the gas sensing layers. The sensors are placed in a tiny gas chamber of a volume of about 22 ml. Breath samples can be either injected or blown into the gas chamber when an additional pump is used to select the last breath phase. DC resistance and resistance fluctuations of selected sensors using separate channels are recorded by an external data acquisition board. Low-noise amplifiers with a selected gain were used together with a necessary bias circuit. The set-up monitors other atmospheric parameters interacting with the responses of resistive gas sensors (humidity, temperature, atmospheric pressure). The recorded data may be further analysed to determine optimal detection methods.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
Metrology and Measurement Systems nr 25, strony 551 - 560,
ISSN: 0860-8229
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Kwiatkowski A., Chludziński T., Smulko J.: Portable exhaled breath analyzer employing fluctuation-enhanced gas sensing method in resistive gas sensors// Metrology and Measurement Systems. -Vol. 25, iss. 3 (2018), s.551-560
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.24425/123892
Weryfikacja:
Politechnika Gdańska

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