A pH meter is an instrument used to measure the acidity or alkalinity of a solution – also known as pH. pH is the unit of measure that describes the degree of acidity or alkalinity. It is measured on a scale of 0 to 14.
Application
• Measures acidity/alkalinity of a buffer, reagent & chemical solution
• The degree of hydrogen ion activity is ultimately expressed as pH level, which generally ranges from 1 to 14.