Soil EC and pH Field Analyser Kit with Arduino Nano + LED
Build a Portable Soil EC & pH Field Analyser with Arduino Nano & GPS Logging
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Walk into a field, power on your own handheld device, and capture GPS-tagged soil electrical conductivity and pH readings on an OLED screen—then save them directly to an SD card for later analysis. This kit puts a professional-grade soil survey tool in your hands, built around an Arduino Nano and rugged probes housed in a waterproof enclosure. Whether you’re monitoring soil health for agriculture, running a school science project, or participating in a hackathon, this analyser gives you the portable logging muscle of much bigger instruments.
What You'll Build
You will assemble a complete field survey instrument: a waterproof cased device that reads soil EC (TDS) and pH using analogue probes, tags every measurement with GPS coordinates and an RTC timestamp, and displays it all on a crisp OLED. The data logs onto a microSD card, ready to be visualised as heat maps or trend charts. Everything runs on a rechargeable LiPo cell, so you can spend hours surveying without carrying a laptop.
What You'll Learn
- Calibrating analogue pH and EC sensors for linear, repeatable readings
- Parsing NMEA sentences from a NEO-6M GPS module to extract latitude/longitude
- Using a DS3231 RTC to time-stamp every measurement record
- Writing structured CSV logs to an SD card with error handling and buffering
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Nano | 1 |
| TDS EC Meter | 1 |
| Analog pH Module | 1 |
| NEO-6M GPS | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 4.7kΩ Resistors | 5 |
| 10kΩ Resistors | 5 |
| PCB Prototype Board | 2 |
| Waterproof Enclosure | 1 |
| 3.7V LiPo 2000mAh | 1 |
| TP4056 Module | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
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
Ideal for CBSE Class 11-12 students with a physics or agriculture elective, B.Tech ECE/EEE undergraduates working on environmental monitoring projects, and teams preparing for the Smart India Hackathon or ATL Tinkering Lab challenges. If you’re an agri-tech researcher or a hobbyist looking to map soil parameters across a farm, this kit gives you a complete, calibrated starting point.
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?
The AI companion walks you through each wiring step and calibration routine. If you need human help, our WhatsApp support replies within a few hours on weekdays.
How do I calibrate the EC and pH sensors accurately?
The build guide includes calibration with dry EC standard solutions and pH buffer powders, with explicit formulas in the Arduino sketch to map raw ADC values to meaningful units.
Can this kit withstand outdoor field use?
Yes, the waterproof enclosure protects the electronics from light rain and dew. The probes are designed for direct soil insertion, and the LiPo battery gives 5–6 hours of continuous logging.
What format are the logged files stored in?
Data is saved as CSV on the microSD card, with columns for timestamp, latitude, longitude, EC (µS/cm), and pH. You can import it directly into Excel, Google Sheets, or GIS tools for mapping.
TDS EC and pH probes in waterproof enclosure with OLED. Log GPS-tagged readings to SD for field soil surveys.
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