Build a Soil CO2 & Conductivity Data Logger for Classroom Science - Arduino Uno Kit

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

Turn a classroom into a soil carbon research station. This kit lets students assemble a portable logger that measures CO₂ concentration emitted by soil samples and simultaneously reads soil conductivity with a TDS probe. Data is timestamped and stored on a microSD card - enabling direct comparison of carbon storage capacity across different soil types, a hands-on climate science investigation aligned with school curricula.

What You'll Build

A battery-operated sensing unit that quantifies soil respiration. Place the MH-Z19B CO₂ sensor near a soil sample to detect rising CO₂ levels from microbial activity, and dip the TDS EC meter to measure ionic conductivity as an indicator of nutrient and carbon breakdown. Real-time readings appear on the 0.96-inch OLED, while the DS3231 real-time clock ensures every datapoint is accurately recorded to the microSD module. Students swap samples - garden soil, vermicompost, sandy soil - and analyse the logged data to infer which soil sequesters more carbon.

What You'll Learn

• Calibrating and reading NDIR CO₂ and conductivity sensors using Arduino Uno
• Building a real-time data logger with microSD storage and RTC timestamping
• Designing controlled experiments to compare soil respiration rates
• Interpreting sensor data to evaluate carbon cycling and storage potential

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11-12 students exploring ecology or environmental science through investigatory projects. B.Tech ECE and environmental engineering undergraduates can use it for semester experiments. ATL Tinkering Labs and Smart India Hackathon teams tackling air quality or agriculture themes will find the real-time logging capability invaluable. Even IIT/NIT/VIT/BITS students can validate soil carbon hypotheses with calibrated sensor data.

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.