Transmitter 9125 – Conductivity / resistivity measurement
Page 5
Mobility of these species in an electric field depends
naturally on their size, weight, transport charge,
viscosity of the field. The greater the concentration of
the species is, the greater the interactions between
these ionic species is.
Principle of electrolytic conductivity
Ohm’s law specifies that the current circulating in the
dipole is proportional to the difference in potential and
resistance of this dipole :
I = E / R
The resistance of a homogenous environment
depends on the geometry of the resitivity
(characteristic of the material) :
R = r . 1/K
Where "r" is the resistivity in Ohm.cm and "K", the cell
constant in cm-1.
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