Difference Between pH Meter and Conductivity Meter

The main difference between pH meter and conductivity meter is that pH meter is used to measure the hydrogen ion concentration of a solution (pH) and conductivity meter used to determine the conductance (electrical current) in a solution. . The unit of conductance is Siemens/cm (S/cm), usually the more impurities in the sample solution, the higher the conductivity value.

pH and conductance are two important factors in various fields. These are generally classified as physical tests, although generally based on the chemical characteristics of the sample or solution.

Both processes are quick and easy to perform and are usually done immediately after obtaining a sample. It is also used to check the stability of the compound; constant changes in these parameters indicate that the base conditions are changing.

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What is the pH meter:

A pH meter is an electronic device that determines the activity of hydrogen ions in solutions, that is, it measures the acidity or alkalinity of a solution. The pH meter is also called a "potentiometric pH meter" because it detects the difference in electrical potential between a pH electrode and a reference electrode.

It consists of a special measuring probe (glass/combined electrode) connected to an electronic meter which displays the pH measurement in decimal form.

The pH scale is normally measured in the pH scale from 01 to 14. The value below pH 07 is considered acidic and above 07 is considered a basic value. We determine the pH using dyes or indicator solutions, pH papers and pH meters.

But the indicator shows whether the solution is acidic or basic, the pH paper gives an approximate idea of ​​the pH of the solution, but the pH meter gives an exact value of the pH of the sample. The pH meter consists of a glass/combined electrode, temperature sensor, display and measurement keys.

What is conductivity meter:

A conductivity meter is an electronic device that measures the amount of electrical current or conductance in a solution. A conductivity meter consists of a conductivity cell or probe. A small electric current passes between two electrodes placed at a fixed distance of about one centimeter.

The conductance of a solution with a high concentration of ions is high, giving rise to a fast current. When the ion concentration is lower, the electric current is slower and the reading is weaker.

Conductivity meter used to determine the amount of electrical conduction or current in a solution. The current is carried almost entirely by dissolved ions. The ability of an ion to carry current is a function of its charge and its size or mass, thus, more charged ions conduct more current and larger ions conduct less current. The conductivity meter consists of a conductance cell, a temperature sensor, a display and measurement keys.

Frequently Asked Questions (FAQ):

What is the difference between pH and conductivity?

pH is a measurement of the concentration of hydrogen ions in a sample which is used to determine the acidity or alkalinity of a compound, while electrical conductivity is a determination of the concentration of ions present in a solution of sample.

Is there a relationship between electrical conductivity and pH?

There is no relationship between conductivity and pH, since pH is related to the number of hydrogen ions per molecule of acid or base, while conductivity depends on free electrons. The presence of hydrogen ions in a substance will affect the pH level and most likely conductivity levels.

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