pH Measurement Using Four Separate Probes

Introduction

This document details a device designed to measure the pH of four different liquids simultaneously using separate probes connected to an Arduino UNO board.

Each probe is connected through an analog input, and the measured values are displayed on an LCD screen and can be easily expanded to support additional probes.

Project Overview

This project is ideal for individuals who need to monitor pH levels in various solutions, such as water or chemical solutions.
It utilizes readily available components like Arduino, pH probes, and a LiquidCrystal display for real-time monitoring. The system can be easily expanded to accommodate additional probes for wider application.

Features

Multi-Probe Measurement

The system supports up to four pH probes, allowing simultaneous measurement of different samples.

LCD Display

Real-time pH values are displayed on a 16x2 LiquidCrystal display for easy monitoring.

Accuracy Enhancement

The code includes filtering and sorting algorithms to enhance accuracy by mitigating measurement outliers.

How It Works

The Arduino code reads the voltage values from each probe through designated analog pins.
These readings are then processed to calculate the corresponding pH levels, which are subsequently displayed on the LCD screen.

Components Used

Arduino UNO Board
4 x pH Probes (up to four probes)
iquidCrystal Display (16x2)
Connecting wires
PCB board for connection
4 x pH modules
plastic ABB box
Power source 5V/1A

Code Overview

The code includes functions specific to each pH probe, sorting and averaging of measurements, and displaying the calculated pH values on the LCD. Additionally, it incorporates data processing techniques to enhance measurement precision.

Wiring

The wiring diagram and pin connections are crucial for accurate readings. Ensure proper connections and refer to the documentation of the pH probes for any specific requirements