Classroom CO2 Monitor Kit with Arduino Uno & DHT22 — Build a Smart Ventilation System That Protects Student Alertness and Plant Growth

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

High CO2 levels in classrooms silently erode concentration. This kit gives you a hands-on way to measure and solve that problem. By combining an accurate MH-Z19B CO2 sensor with a DHT22 temperature and humidity monitor, you'll build a station that automatically triggers an exhaust fan when air quality dips. It's a real-world IoT project for school labs, indoor gardens, or any space where healthy breathing and ideal growing conditions matter.

What You'll Build

A fully functional CO2 and environmental monitoring station. The 16x2 LCD displays live CO2 (in ppm), temperature, and humidity. When CO2 crosses a safe threshold or humidity drifts outside the optimal range, the Arduino activates a relay to turn on a ventilation fan. You can set the thresholds yourself, making it adaptable for a stuffy classroom, a plant growth chamber, or a science exhibition.

What You'll Learn

• Calibrating and reading an MH-Z19B NDIR CO2 sensor with Arduino
• Interfacing a DHT22 for precise temperature and humidity data
• Automating a relay to switch a fan based on multiple sensor conditions
• Displaying real-time environmental metrics on an I2C 16x2 LCD

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11–12 students tackling physics or computer science projects, B.Tech ECE/EEE undergraduates prototyping for Smart India Hackathon, and ATL Tinkering Lab mentors who want a ready-made air quality experiment. It’s also a solid choice for IIT, NIT, VIT, and BITS students designing indoor environment monitors or building IoT-enabled lab ventilation for safer, more focused work.

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.