Build a Hydroponics Nutrient Strength Monitor with Arduino Uno, TDS EC Sensor, and OLED 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.

Step into precision agriculture by building a tool that hydroponic growers and plant scientists use daily - a digital meter that instantly reads the nutrient concentration of any water-based solution. This kit combines an Arduino Uno R3 with a TDS EC probe and a waterproof DS18B20 temperature sensor, turning raw electrical conductivity into clear parts-per-million (PPM) readings on a bright 0.96-inch OLED. Whether you're optimizing lettuce growth in a school ATL lab or preparing a submission for the Smart India Hackathon, you'll finish with a portable, calibrated device that shows exactly when your nutrient solution hits the sweet spot for vigorous plant growth.

What You'll Build

You'll assemble a handheld or benchtop monitor that dips a TDS EC probe into a hydroponic reservoir, auto-corrects for temperature via the DS18B20, and displays the real-time PPM. The OLED screen includes a visual target-range indicator - a simple bar or icon that turns from red to green when the solution enters the ideal zone for leafy greens, tomatoes, or whatever crop you're growing. All components plug into the included 400-point breadboard, leaving room to add a data logger or buzzer later.

What You'll Learn

• Interface an analog TDS EC meter with Arduino and convert voltage to PPM using the standard 500 scale
• Read precise liquid temperature with a DS18B20 waterproof sensor over OneWire for conductivity compensation
• Drive a 0.96-inch I2C OLED using the SSD1306 library to show numeric values and dynamic range graphics
• Calibrate the meter with known solutions (e.g., 1413 �S/cm reference) to ensure real-world accuracy

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for CBSE Class 11-12 students exploring sensor-based agriculture, B.Tech ECE/Agri-tech undergrads building mini projects, and ATL Tinkering Lab facilitators running hydroponics workshops. It also suits IIT, NIT, VIT, and BITS students preparing prototypes for hackathons where quick, reliable nutrient monitoring can make a winning demo. If you've ever wanted to move from textbook theory to a working instrument that solves a real agritech problem, this kit is your on-ramp.

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.