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Real-time system for monitoring the water vapour concentration and temperature of air exhaled from human lungs

Sławek N., Kumala W., Winkowski M., Stacewicz T.

Sensing and Bio-Sensing Research

41, 2023, art. 100575, 10.1016/j.sbsr.2023.100575

This article describes a fully optoelectronic system for measuring the H2O concentration and temperature of air exhaled from human lungs. A device consisting of both a laser hygrometer and an ultra-fast resistive thermometer. It was tested during an experiment with saturated water vapour, confirming its accuracy for measuring H2O concentration in air. Data, from a preliminary investigation of breath samples from anonymous adult volunteers, is presented.


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