A digital pH meter is an electronic device used to measure the acidity or alkalinity of a solution accurately and quickly. It consists of a glass electrode sensitive to hydrogen ion concentration and a reference electrode connected to an electronic meter that displays the pH value digitally. The meter provides precise readings on a digital screen, eliminating the need for color comparison like traditional pH papers. Widely used in laboratories, industries, agriculture, and environmental testing, digital pH meters help monitor and control chemical processes, water quality, and soil conditions efficiently.