Laboratory Equipment & Services Information System by Centralized Laboratory Management Office (CeLMO)

pH meter is a statistical tool that monitors the hydrogen-ion activity in water-based solutions, determining its acidity or alkalinity represented as pH. It measures pH on a scale of 0 to 14. The proportion of hydrogen ions (H+) to hydroxyl ions (OH-) determines a substance’s pH value.

students are required to wear safety equipment,wear lab coat, safety glasses, gloves, etc. as required for the experiment. 

please bring your own tissue and any glasware etc

The pH meter is basically a high impedance amplifier that accurately measures the minute electrode voltages and displays the results directly in pH units on either an analog or digital display.The working principle of a pH meter is based on the generation of an electrical potential difference between reference and measuring electrodes. A pH meter operates by measuring the voltage difference that develops between its reference electrode and its measuring electrode.

The electrodes detect the hydrogen ions in solutions producing an electric charge. The meter uses the voltage to generate pH measurements. The system determines voltage levels through the application of the Nernst equation that relates to hydrogen ion densities