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Linear temperature correction:
In moderately and highly conductive solutions, temperature correction can be
based on a linear equation involving a temperature coefficient (
θ
). The
coefficient is usually expressed as a conductivity variation in %/°C.
Linear temperature correction is used, e.g. for saline solutions, acids and
leaching solutions.
where:
K
Tref
= Conductivity at Tref
K
T
= Conductivity at T
T
ref
= Reference temperature
T = Sample temperature
θ
= Temperature coefficient
Note: the correction is accurate only within a limited temperature range around
T1 and T2. The greater the difference between T and Tref, the higher the risk of
error.
Calculating Temperature Coefficients
(
θ
)
By measuring the conductivity of a sample at temperature T1 close to Tref and
another temperature T2, you can calculate the temperature coefficient by
using
the following equation:
Κ =
T
100
+ θ • (
T - T )
Tref
ref
• Κ
100
(Κ - Κ ) •
100
(
T
-
T
) •
Κ
θ =
T2
2
T1
T1
1
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