Water pH Science Tester Kit with Arduino Uno: Build a Digital pH Meter for Hands-On Science

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 curiosity about everyday liquids into a measurable scientific experiment. This kit lets you build a portable pH tester that reads the acidity of tap water, fruit juice, and cola, displaying the pH value instantly on an LCD screen. Perfect for school science fairs, ATL tinkering sessions, and young explorers aged 5-15. By comparing different liquids, students learn about acids, bases, and how electronics can measure the world around us.

What You'll Build

Build a handheld digital pH meter that measures the acidity of water and common beverages. The assembled device uses a glass pH electrode connected to an Arduino Uno, processing the analog voltage signal and converting it into pH units shown on a 16x2 LCD. The probe's sensitive electrode detects hydrogen ion concentration, letting you test any water-based solution — from neutral tap water to acidic cola. Compare samples side by side and watch how pH values change, sparking discussions on chemistry and sensor technology.

What You'll Learn

• How to interface a pH sensor with Arduino and read analog voltage signals to compute pH levels.
• The science of pH, acidity, and alkalinity through real-world testing of household liquids such as water, juice, and cola.
• Displaying sensor data on a 16x2 LCD using I2C communication, including installing libraries and wiring the backpack.
• Basic electronics assembly on a breadboard, connecting resistors, jumper wires, and managing power from a 9V battery.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is ideal for CBSE Class 6–10 students working on science exhibitions, ATL Tinkering Lab participants, and young makers exploring chemistry and electronics. It directly supports the “Acids, Bases and Salts” chapter with a real, working pH meter. B.Tech ECE/EEE students can use it to grasp sensor interfacing fundamentals. Perfect for Smart India Hackathon junior challenges and any Indian classroom or home lab encouraging STEM discovery.

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.