Build a Colour-Coded Air Quality Index Monitor with Arduino Uno & Sensors

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Whether you're monitoring classroom air quality for a CBSE project or building a prototype for the Smart India Hackathon, this kit turns raw sensor data into a meaningful air quality index — displayed as green, yellow, or red on a crisp OLED screen. The MQ-135 detects pollutants like NH3, benzene, and smoke, while the DHT22 adds temperature and humidity, and the BMP280 captures atmospheric pressure. Together, they feed a composite AQI algorithm you'll code and calibrate.

What You'll Build

You’ll assemble a portable air quality monitor that reads multiple environmental factors, combines them into a weighted AQI score, and instantly shows whether the air is healthy or hazardous using a colour-coded display. The device works on a breadboard, runs off a 9V battery, and can be enclosed in a simple case for field use.

What You'll Learn

• How to interface analogue and digital sensors with Arduino Uno
• Calibrating MQ-135 gas sensor for ppm-level detection
• Reading temperature, humidity, and pressure from DHT22 and BMP280
• Writing a composite AQI algorithm using multiple sensor inputs

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 students working on physics or environmental science projects, B.Tech ECE/EEE sophomores prototyping sensor systems, and ATL Tinkering Lab participants. If you're preparing for Smart India Hackathon or building a personal weather-and-air station, this kit gives you a solid hardware-software foundation with a clear visual output.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.