A conductivity cell consists of

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  1. Two platinised platinum electrodes
  2. A platinum calomel electrode system
  3. A platinum tungsten electrode system
  4. A glass calomel electrode system

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Saraswathi.B's picture

Answer: 

Two platinised platinum electrodes

The conductivity cell is also called as electrode cell which are made of platinised platinum electrodes.

Electrode Construction and Use

All types of the electrodes identifies ions in the solution. The conductivity cell consists of two or four poles. Three pole devices is common but now generally it is replaced by the four pole cells.

The two pole cells are made of platinum plates, these platinum plates forms a rings around the electrode which is covered by the spongy platinum coating which reduces the polarization between the two cells. By applying of the current between the two poles or cells measures the resulting the voltage. It is an accuracy method and it is best for the low conductivity measurements.

A two-pole cell diagram.

Four-pole cells are the electrodes uses two pairs of the poles. When current is applied to the outer poles, the inner poles measures the voltage result without polarization. It is used for higher conductivity applications, free calibration and diagnostics.

A four-pole design, showing voltage (V) and current (I) loops.

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