Design a pH Meter Using Arduino

Abstract

Background: Accurate pH measurement is vital in diverse settings such as water quality assessment, food production, and laboratory procedures. This study introduces a pH meter design utilizing the Arduino platform, a cost-effective and user-friendly open-source electronic platform. Objective: To develop and test an Arduino-powered pH meter that displays a solution's pH accurately on a liquid crystal display (LCD). Methods: The design is based on a pH sensor, which measures the pH by detecting voltage differences between reference and pH electrodes. These values are then shown on an LCD managed by the Arduino board. Calibration and verification of the device's accuracy were conducted using buffer solutions with known pH values. Results: The Arduino-centric pH meter proved to be both practical and reliable, with a maximum inaccuracy of only 0.1 pH. It provided accurate readings within the pH range of 4.0 to 9.0. Conclusion: Arduino-driven pH meters offer an efficient, affordable, and simple means for pH measurements across various applications. Given its proven precision and reliability, this design can be applied in any scenario demanding pH value determinations.

Keywords

• the ph meter; electrode; ph water
• arduino; design; glass electrodes; temperature sensor; lcd
• internal calibration
• storage.