System of Breath Analyzer based on Metal-Oxide Semiconductors

This paper present the development of a breath analyzer system by designing a calibration method and measurement chamber for measuring exhaled breath gas. It provides a concept of accurate sample measurement and calibration methods. The design system of the breath analyzer optimized the gas sensor role to measure several gas variants produced by human breath. Gas concentration measurement was performed using the Matlab GUI app and optimized gas concentration reading in parts per million (ppm) using the proposed program. The proposed housing design and the use of a one-way inlet can prevent fluctuating airflow during the gas measuring process, and involving the influence of temperature and humidity on gas measurements using the MOS sensor will increase the accuracy of measuring breath gas concentration. This system is made for work with low power and is cost-efficient. With this method, there will be more comfortable and efficient for people to monitor their health condition.