Appendix 1
Cell Constants
Conductivity cells with different cell constants can be used to
achieve greater accuracy or used to make difficult measurements
easier. Selection of the correct cell constant is dependent on the
conductivity range of the sample. Conductivities of various
waters and common solutions, together with the most suitable
cell constants are given below.
K=0.1/cm
For measurement of solutions with very low conductivity e.g.:
pure water, de-mineralise water; distilled water; boiler feed
water
K=1.0/cm
For measurement of solutions with medium conductivity e.g.:
Surface water; waste water; diluted salt solutions; fertilizers;
electroplating rinses.
K=10/cm
For measurement of solutions with high conductivity e.g.:
Strong acid; strong alkali; strong salt solutions; sea water
Cell Conversion Table
c.i,.s. Units
SI Units
K�I.O/cm
K�J00.0/m
K�0.1/cm
K�JO/m
K�J0.0/cm
K�JOOO/m
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