The choice of the correct conductivity cell is important to be able to perform correct measurements. Each cell has certain specific properties that determine which values can be measured the best.

The cell with a constant of 1 cm^-1 is mostly for general use.

A cell with a constant of 0.1 cm^-1 is best for measurements of very low values such as pure, distilled or demineralised water, low-ionic solutions.

A cell with a constant of 10 cm^-1 is best for measurements of high values such as brine, saline solutions, strong acids, …

The glass cells with a constant of 1 and 10 have Platinum measurement plates which are covered with Platinum black. This layer of Platinum black serves to reach higher measurement values. It is also susceptible to modification of the capabilities of the cell when the layer is touched mechanically. The glass cells provide the best results over the widest measurement range.

Epoxy cells with graphite measurement plates are mostly more limited in use of range and for use in organic solutions: check the chemical compatibility of the epoxy with the solution and with possible required cleaning solvents.

The standard electrodes can be obtained with or without integrated temperature compensator (ATC).

Mind also that we have 2 pole and 4 pole conductivity cells. The 4 pole cells are for use with only a limited range of devices.

The choice of the cell constant also determines the measurement ranges of the instrument. Each range is multiplied with the value of the cell constant. This results e.g. for a device of:

The C3000, C6000 and R3600 ranges:

The C1000 and C5000 ranges (only C1020 and C5020 accept also 0.1 and 1.0 cell constants!):