Why are there different types of electrode?

There are different types of combination electrodes. The basic pH sensing system does not change.

The sealed chamber contains a pH7 buffer solution. The glass bulb measures the potential, mV, of the solution. The meter converts the mV signal to a pH value on the display.

The reference type can change, according to the sample being measured.

The reference filling medium can be liquid or gel.

It may have a single or double junction.

The electrode may have a glass or plastic housing.

The pH glass may be shaped to meet application requirements.

For example, flat surface or spear type.

Posted in: E-chem