Low-Cost Portable Gas Pollutants Detection System for People with Olfactory Impairment

摘要

Olfactory impairment refers to complete loss of normal ability to smell. Problems in nose, nervous system, or brain can lead to olfactory impairment. People with olfactory impairment need assistive devices for detecting the presence of harmful gases so that they can take necessary steps to protect themselves. Here, we propose a gas pollutants detection system. It is designed for four harmful gases methane, carbon monoxide, LPG, and air pollutants. It displays the amount of gases using LCD, provides audio output about safe or dangerous levels in a particular area by comparing the measured values with threshold levels and to save the information in the SD card. It is a low-cost portable system.