20251EIOT5: Air Quality Monitor

Last updated on 27 Jul 2025

Brief Description & Functionality

An Air Quality Monitor is a compact device that detects and displays levels of air pollutants and environmental parameters in real time. It is widely used for monitoring indoor air quality in homes, offices, schools, and healthcare environments.

Why it's useful:

Detects harmful gases and particulate matter (PM2.5, PM10)
Promotes healthy indoor environments
Useful in smart homes, green buildings, and personal health tracking
Enables preventive action for individuals with asthma or respiratory issues

Air quality monitors use gas sensors, particulate sensors, and environmental sensors to detect:

Particulate Matter (PM2.5 / PM10) – solid and liquid particles suspended in the air
Carbon Dioxide (CO₂)
Volatile Organic Compounds (VOCs)
Temperature and Humidity

Each sensor outputs data (analog or digital) that is processed by a microcontroller and displayed on a screen. If connected to Wi-Fi, it can also push data to the cloud or a mobile app.

Associated sensors/components and their descriptions

Component	Description
PM Sensor	Measures fine dust particles
Gas Sensor	Detects gases like CO₂, CO
Environmental Sensor	Measures temp/humidity
Microcontroller	ESP32 or Arduino to collect and process sensor data
Display Screen	OLED, TFT or LCD shows readings
Power Supply	USB power or rechargeable battery
Wi-Fi/IoT Module	ESP32 or external module for data upload

Market Survey

Useful Resources

Skills Required

PCB Design
CAD design
3D Printing FDM
ESP32 Programming
Manual Soldering
Electronic Testing