The below circuit is take from here.

May I know how this circuit maintains the Potential at Reference Electrode and Working Electrode same.


Here you can see that the working electrode is connected to IC1 and Refrence electrode to IC2.They are not in a common loop.Then how this circuit maintains same potential at working electrode and reference electrode.

 

Yes, you may know now. Asthe voltage at the working electrode would tend to decrease, that increases the gate to sourcevoltage tends to increase and that increase tends to raise the working electrode voltage.