Electrochemical pH Calibrator Kit with Arduino Uno
Build Your Own Electrochemical pH Calibrator with Arduino Uno – Precision Lab Tool
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Convert a standard analog pH probe into a precise electrochemical calibrator. The Arduino Uno reads the millivolt signal, performs two-point calibration with the provided pH 4 and pH 7 buffers, and stores the offset and slope in EEPROM. Whether you're testing water quality for a school project or setting up a chemistry lab, this kit delivers professional-grade accuracy in a compact, reusable build.
What You'll Build
A complete pH meter that auto-calibrates at the touch of a button. After dipping the probe in the buffer solutions, the Arduino computes the linear response and saves calibration constants to non-volatile memory. The I2C-connected LCD shows pH readings in real time. With calibration data persistent, you can power off and on without losing accuracy—making it a reliable tool for your maker bench or classroom.
What You'll Learn
- Two-point electrochemical calibration using the Nernst equation
- Analog signal conditioning from a pH probe module
- Writing and reading float values to Arduino EEPROM
- Displaying real-time sensor data on a character LCD with I2C
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| Analog pH Module | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| Tactile Button | 2 |
| 10kΩ Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| pH Buffer Solution (pH 4 & pH 7) | 2 |
| 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
Designed for CBSE Class 11-12 chemistry or physics projects, B.Tech ECE/EEE instrumentation labs, Smart India Hackathon water quality monitoring challenges, and ATL Tinkering Labs. It also fits seamlessly into IIT, NIT, or VIT student labs that need a reusable pH calibration tool.
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 on the box to access your AI build companion trained on this specific kit. You can also reach us on WhatsApp for hands-on assistance within hours.
What buffer solutions are included and how long do they last?
The kit includes one bottle each of pH 4.0 and pH 7.0 buffer solutions, sufficient for dozens of calibrations. They are stable for months if stored capped.
Can I recalibrate later if the probe drifts?
Yes, the two tactile buttons initiate a new two-point calibration routine at any time. The Arduino updates the offset and slope in EEPROM immediately, so you never lose accuracy.
Do I need to solder anything?
No soldering required. The breadboard and pre-made wires let you assemble the circuit in under an hour, and you can easily modify or expand it later.
pH probe two-point calibrated using pH 4 and pH 7 buffer solutions. Arduino stores offset and slope in EEPROM.
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