Swimming Pool pH Tester Kit with Arduino Uno + LED – Build Your Own Pool Maintenance Beam Alarm

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

Keep your pool water crystal-clear without constant manual checks. This kit teaches you to assemble an optical beam break sensor that stands watch over your pool skimmer or sample tube. The moment floating debris or murky water disrupts the infrared beam, a bright red LED and loud active buzzer let you know it’s time for maintenance. Far simpler than a real pH meter, it introduces you to the core principle behind turbidity and color-based water quality sensors.

What You'll Build

You’ll build a working IR beam‑break detector module that can sit beside your pool’s filtration inlet or a small cuvette holder. Align two 940nm IR LEDs with two photodiodes across the water path; when the beam stays strong, the pool is clean. When leaves, algae, or high particle load cut the light, the Arduino instantly activates the buzzer and warning LEDs. The device runs on a 9V battery, so you can place it right where you need it.

What You'll Learn

• How IR LEDs and photodiodes create a wireless sensor pair without any physical contact with water
• Amplifying tiny photodiode signals using an LM358 op‑amp for reliable Arduino reading
• Coding logic that compares light intensity to a threshold and triggers alarms
• Real‑world prototyping skills on a 400‑point breadboard, preparing you for larger STEM projects

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students exploring sensor‑based projects, B.Tech ECE/EEE students preparing for mini‑project submissions, and ATL Tinkering Lab members who want a quick, functional optical alarm. Smart India Hackathon participants can adapt the IR beam concept for perimeter security or water turbidity monitors. Even parents working with young hobbyists (ages 5–15) will find the build simple enough to complete with minimal adult guidance.

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.