Conductivity Measurements

is a measure of how well a solution conducts

electricity.

Application of conductivity. The water contains

contaminants, largely ionic, that if not removed will cause

scaling and corrosion in plant equipment, particularly in heat

exchangers, cooling towers, and boilers.

is also used to monitor the build up of dissolved

ionic solids in evaporative cooling water systems and in boilers.

The choice of which to use depends

on the amount of conductivity, the corrosiveness of the liquid,

and the amount of suspended solids.

the _________

method is better when the conductivity is high, the liquid is

corrosive, or suspended solids are present.

consist of two metal

electrodes, usually stainless steel or titanium, in contact with the

electrolyte solution,

The electric field causes the ions to move

back and forth producing a current. Because the charge carriers are

ions, the current is called an

measures the

current and uses Ohm’s law to calculate the resistance of the solution

(resistance = voltage/current).

The conductance of the solution is the

In the ____ _________ ___________, the analyzer injects an

alternating current through the outer electrodes and measures

the voltage across the inner electrodes.