Arduino TDS EC Monitor Kit - Hydroponic Nutrient PPM OLED Display
Build Your Own Hydroponic Nutrient Strength Monitor with Arduino Uno, TDS EC Sensor, and OLED PPM Display
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine walking into your vertical farm or hydroponic setup and instantly knowing whether your nutrient solution is at the perfect strength for maximum plant growth. This kit puts that power in your hands. You'll assemble a real-time TDS/EC meter that reads dissolved solids in water, corrects values using a waterproof temperature probe, and displays PPM on a crisp OLED screen with clear target-range indicators. It's a genuine industrial-process monitoring build, shrunk to your desk, teaching you the principles that drive modern agritech in India.
What You'll Build
You'll build a standalone nutrient monitoring system that measures TDS (Total Dissolved Solids) from 0 to 1000+ PPM, compensates readings based on temperature from a DS18B20 probe, and shows the current PPM value alongside a dynamic visual bar that marks the optimal zone for leafy greens or fruiting crops. Plug it into a 9V battery, dip the sensors, and watch the OLED guide you whether to dilute or add nutrients.
What You'll Learn
- Read analog voltage from a TDS EC meter and convert it to electrical conductivity using industry-standard formulas.
- Interface a DS18B20 waterproof temperature sensor via OneWire protocol and apply real-time temperature compensation to PPM values.
- Drive a 0.96-inch OLED display over I2C, drawing custom graphics and a live refresh bar for target PPM range.
- Calibrate the sensor system with reference solutions and understand unit conversions between �S/cm, PPM, and TDS factor.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| TDS EC Meter | 1 |
| DS18B20 Waterproof | 1 |
| 0.96in OLED | 1 |
| 4.7k? Resistors | 5 |
| 10k? Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| 9V Battery Snap | 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
This intermediate kit is crafted for CBSE Class 11-12 students diving into sensor-based agriculture projects, B.Tech ECE/EEE undergraduates prototyping for Smart India Hackathon, and ATL Tinkering Lab innovators building automated hydroponic systems. It also suits hobbyists exploring precision farming in urban Indian balconies or school labs running IoT plant-monitoring experiments.
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 inside the box to chat with the AI companion, trained on every connection, code line, and calibration step for this exact kit. You can also reach us on WhatsApp for human support from our Bengaluru team.
How do I calibrate the TDS EC meter for accurate PPM readings?
The AI companion provides step-by-step calibration using a NaCl reference solution (not included). It covers voltage-to-TDS mapping and temperature compensation, plus how to adjust code if you use standard calibration fluids.
Can I use this kit to monitor nutrient strength in soil instead of water?
The included TDS EC meter is designed for aqueous solutions. For soil, you'd need a soil-moisture probe. However, you can extract soil solution into water and measure PPM as a proxy for nutrient content, and the DS18B20 works in soil just fine for temperature monitoring.
Is this kit suitable for a Smart India Hackathon project on smart farming?
Absolutely. The real-time TDS EC monitoring with OLED display and temperature correction is directly applicable to SIH problem statements on automated hydroponic greenhouses or precision agriculture. The build also teaches sensor integration and data display - core elements for any agritech prototype.
Industrial Process - TDS EC sensor reads nutrient solution strength. OLED shows PPM with target range indicator for plant growth.
What's in this kit
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