Electrical Conductivity
(EC) meters measure the capacity of ions in
an aqueous solution to carry electrical current.
As the ranges in aqueous solutions are usually
small, the basic units of measurements are
milliSiemens/cm (mS/cm) and microSiemens/cm
(µS/cm).
Conductivity is used widely to determine the
level of impurities in water supplies for
domestic consumption as well as industrial
use. Industries that employ this method include
the chemical, semi-conductor, power generation,
hospitals, textile, iron and steel, food and
beverage, mining,
electroplating, pulp and paper, petroleum
and marine industries.
Specific applications include chemical streams,
demineraliser output, reverse osmosis, stream
boilers, condensate return, waste streams,
boiler blowdown, cooling towers, desalinisation,
laboratory analysis, fruit peeling and salinity
level detection in oceanography.
Some applications
require the measurement of Total Dissolved
Solids (TDS) in mg/L, parts per million (ppm)
or parts per thousand (ppt). The TDS concentration
can be obtained by multiplying the conductivity
value with a factor which is empirically determined.
The total TDS is a mass estimate and is dependent
on the mix of chemical species as well as
the concentration while Conductivity is only
dependent on the concentration of chemical
species.
Eutech offers
a wide range of conductivity meters for these
various applications.
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