How to convert electrical conductivity to pH

[Minh Thanh]

Homework Statement

I have some data from measuring EC in solutions and I don't know how to convert EC to pH

Homework Equations

The Attempt at a Solution

I use Arduino for programing. Values of ADC of EC that I collect from microcontroller are 80 ( for EC : 0.2mS/cm ) , 90 ( for EC : 0.5mS/cm), 110 ( for EC 0.7mS/cm) .

 

[Asymptotic]

The relationship between pH and conductivity is a complex one. Here is an article which may be of assistance.