User guide

IM 12D03D02-01E
7-1
7. Measuring Principles of this Instrument
7. Measuring Principles of this
Instrument
7.1 What Is Conductivity?
Conductivity of a solution is defined as the ability of the solution to conduct electric
current. It is the reciprocal of the resistance between two sensors (both of areas 1 m
2
) at
a distance of 1 m apart in the solution.
1 S/cm = 100 S/m
Figure 7.1 shows the conductivities of typical solutions.
Pure
water
Sea
water
Deionized
water
Distilled
water
Reservoir
water
Strong acid and
alkali solutions
Salt water
(1 to 27%)
Organic
acid
0.1110100 1000 [mS/cm]
0.01 0.1110100 [mS/m]
110100 1000 [mS/cm]
0.1110100 [S/m]
F0701.EPS
Figure 7.1 Conductivity of Typical Solutions