Response Characteristics of Semiconductor Gas Sensors for Odors in the Living Environment

Abstract

The purpose of this study was to understand the response characteristics of odorants by semiconductor gas sensors, and to explore sensors that can determine the occurrence of odorants in the living environment. For the experiment, 20 types of odorants were selected from among the odorants that are likely to occur in the living environment. The concentration of odorant was adjusted to correspond to odor intensity 2, 3, and 4, and evaluated by subjects and measured by sensors. Six people who passed the panel selection test were employed as subjects, and three types of semiconductor gas sensors were used as sensors. As a result of analyzing the relationship between the sensory evaluation value and the sensor value, it was clarified that one of the three types of semiconductor gas sensors had a correlation with 16 out of 20 kinds of odorants and had high sensitivity.