Air Quality Colour Indicator Kit: Visual Pollution Monitor with Arduino Uno & MQ-135

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

Watch the NeoPixel ring glow green, yellow, or red as the MQ-135 sensor detects changes in the air around you. Whether it’s a smoky kitchen, a dusty workshop, or outdoor traffic fumes, this kit turns invisible air quality into an instant, colourful signal. Perfect for science fairs, classroom demos, or sparking a child’s interest in real-world environmental monitoring.

What You'll Build

A compact, breadboard-based air quality station that reads gas concentration levels and immediately displays them on a bright 12-LED ring. Place it near a source of smoke, incense, or vehicle exhaust and watch the colours shift with the air you breathe. In under two hours, you’ll have a working model that makes pollution visible for school exhibitions or home curiosity.

What You'll Learn

• How to read analog sensor data from the MQ-135 gas sensor and interpret voltage changes.
• Mapping sensor values to visual colour output on a WS2812B NeoPixel ring using conditional logic.
• Basic Arduino programming: reading analog pins, setting digital outputs, and creating colour thresholds.
• Understanding air quality indicators such as CO₂, smoke, ammonia, and their health impact.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is ideal for CBSE Class 5–9 students building a science model on air pollution, B.Tech ECE first-year mini-project learners, ATL Tinkering Lab enthusiasts, and parents introducing environmental sensors at home. Even a 7-year-old can follow the colour-coded steps with light adult supervision. Teachers can use it as a ready-made STEM activity that connects textbook concepts to a living display of air quality.

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.