DIGITAL PH METER

Abstract

A pH Meter is an electronic device which is used for measuring the pH.The pH is either the
concentration of Hydrogen ions in an aqueous solution or the active number of Hydrogen
ions in an aqueous solution. The pH scale can measure that how acidic or basic a solution is.
The pH scale has range of from 0 to14. A pH 7 of solution is neutral; A pH less than 7 of the
solution is acidic. A pH greater than 7 of solution is basic. PH is defined as the negative
logarithm of the hydrogen ion concentration.Using digital pH meter we get the numerical
value of pH with more accuracy where as in conventional methods we get only indication
that the solution is alkaline or base. As it gives the exact number of pH so it is easy to
maintain the solution at neutral level. Also it gives the accuracy up to 0.01 %. In this work we
used a magnetic stirrer or mixerwhich is employed for rotating the magnetic field for stirring
the solution while sensing the hydrogen ionconcentration.