Question

What is meant by cell constant?

Answer 1

Explanation,

1. A multiplier constant unique to a conductivity sensor is the cell constant.
2. To evaluate the electrical conductivity of the solution, the measured current is multiplied by the cell constant.
3. The cell constant, known as $\mathrm{K}$ is a theoretical electrode consists of a distance of 1 cm between two 1 cm square plates.
4. The cell constant, $\mathrm{K}$ is equal to the distance in cm between the electrodes of the probe separated by the electrode's surface area in ${\mathrm{cm}}^2$.
5. It has an SI unit ${\mathrm{m}}^{-1}$, Cell constant=${\displaystyle \frac{\text{Distance between the electrodes}}{\text{Surface area of electrode plates}}}$.
6. Suppose the distance between the electrodes is $‘\mathrm{l}’$ and the surface area is $‘\mathrm{a}’$ then cell constant K is$\Rightarrow \mathrm{K}=\frac{\mathrm{l}}{\mathrm{a}}$.
7. The electrodes may be positioned close together or made larger for low-conductivity solutions so that the cell constant is less than one.