 Glass Electrode

Glass Electrodes make use of the ion-selective properties of glass and are used today in pH measurements.

The indicator electrode consists of a thin glass membrane that is contained inside a thick-walled glass or plastic tube. Inside the tube, there exists a solution of HCl (0.1M) satured with AgCl together with a silver wire. This is an internal Ag/AgCl reference electrode. The indicator electrode is connect with another refenrece electrode (the external one) and thus the cell is complete.