TDS Water Quality Sensor Kit with Arduino Uno – Test Your Drinking Water in 2-3 Hours

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Have you ever wondered if your tap water, RO water, or even rainwater is safe to drink? With this kit you build a compact digital meter that reads Total Dissolved Solids (TDS) in parts per million and instantly labels it Good, Average, or Poor on a bright 16×2 LCD. It’s hands‑on environmental science, Arduino programming, and real‑world sensor use — packed into a single afternoon project.

What You'll Build

You'll assemble a portable water quality checker that uses a TDS conductivity probe. The probe dips into any non‑corrosive water sample, the Arduino Uno processes the electrical signal, and the LCD displays the exact ppm number together with a clear drinking‑quality classification. The whole circuit lives on a breadboard and runs on a 9 V battery — ready for school exhibitions, STEM fairs, or quick checks at home.

What You'll Learn

• Interface a TDS (EC) sensor with an Arduino and calibrate it for reliable ppm readings
• Understand how dissolved solids change electrical conductivity and what that means for water safety
• Program a 16×2 LCD with an I2C backpack to show live sensor data
• Classify drinking water using WHO / Indian standard TDS thresholds in your code

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE students from Class 6 to 12 building science fair projects or exploring sensor‑based monitoring. ATL Tinkering Lab participants who need a ready‑to‑go water testing experiment. First‑year B.Tech ECE/EEE learners looking for a genuine Arduino sensor project. Also, a wonderful weekend STEM activity for curious young minds (10–15 years) who want to compare water from different taps, filters, and bottles.

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.