Application Basics:

Monitoring water quality is essential in countless applications... from the water
we drink, to the water required for industrial, commercial, medical, and lab uses.

Water supplies fluctuate, and treatment system performance can vary. Conductivity
is the most convenient tool for measuring overall water quality. Although the
measurement itself is not specific to a particular constituent, conductivity is often used to:

1)  Accurately correlate the concentration of a particular chemical added to water of
predetermined conductivity. Examples of such applications include:

Rinse Tanks
Fertilizer Control
Printing Fountain Solution
Process Water

2)  Monitor Water Quality in:

Water SuppliesWater Purification Systems, ie.: Reverse Osmosis, Deionization, etc.
Cooling Towers and BoilersDesalination Systems
Commercial/Industrial Process
Wastewater 

See: What is Conductivity & Resistivity