Soil CO2 Flux Monitor Kit with Arduino Mega - STEM Project
Build a Soil CO2 Flux Monitoring System with Arduino Mega - Classroom STEM 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 raw soil data into a quantified story of decomposition. This kit equips you to build a portable CO2 and temperature monitor that logs real-time carbon dioxide flux from soil cores - a vital tool for environmental science classrooms, Smart India Hackathon prototypes, and advanced agriculture projects. By integrating dual NDIR sensors with a multi-depth temperature profile, you capture the invisible respiration cycle that drives carbon cycling, all while learning embedded system design and sensor calibration.
What You'll Build
You'll assemble a fully functional field instrument with dual MH-Z19B CO2 sensors - one for ambient reference, the other embedded in a soil column - and four DS18B20 stainless-steel probes placed at different depths. A DS3231 real-time clock stamps every reading, a microSD module stores CSV logs, and a 0.96-inch OLED displays live CO2 concentrations and soil temperatures. Everything fits inside a waterproof enclosure powered by a 9V battery, ready to deploy in a school garden, a lab incubation chamber, or an outdoor research plot.
What You'll Learn
- Calibrating NDIR CO2 sensors for soil gas measurement and drift compensation
- Building a multi-depth temperature profile and calculating CO2 flux gradients
- Logging timestamped sensor data to an SD card and managing file systems
- Designing a menu-driven UI on an OLED display with Arduino Mega
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | x1 |
| MH-Z19B CO2 | x2 |
| DS18B20 Probe | x4 |
| DS3231 RTC | x1 |
| MicroSD Module | x1 |
| 0.96in OLED | x1 |
| 4.7k? Resistors | x10 |
| 100nF Caps | x10 |
| PCB Prototype Board | x2 |
| Waterproof Enclosure | x1 |
| 9V Battery Snap | x1 |
| Soldering Iron | x1 |
| Solder Wire | x1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Designed for B.Tech ECE/EEE students building environmental sensor networks, environmental science majors quantifying soil respiration, and Smart India Hackathon teams prototyping IoT solutions for agriculture or climate studies. It also serves as an advanced lab module for ATL Tinkering Labs at the senior-secondary level and for IIT/NIT/VIT/BITS students exploring embedded systems, data logging, and sensor fusion.
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.
What if I get stuck during the build?
Scan the QR code to access the AI companion, which has been trained on this specific soil CO2 monitor and can guide you step-by-step. If you still need help, our WhatsApp support team reviews the conversation log and assists within 24 hours.
Can I use this kit to measure CO2 in ambient classroom air instead of soil?
Absolutely. The dual sensors let you monitor ambient air while the other probes soil; you can place both in open air to track room CO2 levels, making it useful for ventilation studies as well as decomposition experiments.
How do I prepare a soil core for the sensors?
The waterproof enclosure can be sealed with a rubber grommet. Insert a short PVC pipe segment, pack it with soil around the probes, and place the assembly over a soil sample or in a garden bed to simulate a natural core.
Can I view data without an SD card?
Yes, the Arduino Mega streams live readings via USB to a computer. However, the microSD module is essential for unattended field logging, and the kit includes everything you need to start recording immediately.
School Ventilation - CO2 and temperature sensors in soil core measure carbon dioxide flux from decomposition activity.
What's in this kit
Choose your assembly option:
- Soldering Kit - 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo - 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items