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Analytical · Glossary

What is Cell Constant?

Symbol: K1/cmAnalytical

Cell constant is the geometry factor of a conductivity cell, the electrode spacing divided by effective area.

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Cell Constant Explained

It converts measured conductance to conductivity. The nominal value is set by design; the exact value is found by calibration with a standard solution.

Typical constants are 0.01 for pure water, 0.1 to 1 for general water, and 10 for concentrated solutions.

Cell Constant Formula

K = d ÷ A
delectrode spacing (cm)
Aelectrode area (cm²)
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Calculators for Cell Constant

CalculatorConductivity Temperature Compensation CalculatorFree online calculator with formula and worked example.CalculatorTDS CalculatorFree online calculator with formula and worked example.

Frequently Asked Questions

What is Cell Constant?

Cell constant is the geometry factor of a conductivity cell, the electrode spacing divided by effective area.

Does the cell constant change?

Coating and wear change it slightly; recalibrate periodically.

How is it calibrated?

With a standard of known conductivity, such as a KCl solution.

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