Dynamic hydrogen electrode
A dynamic hydrogen electrode (DHE) is a reference electrode, more specific a subtype of the standard hydrogen electrodes for electrochemical processes by simulating a reversible hydrogen electrode with an approximately 20 to 40 mV more negative potential. == Principle == A separator in a glass tube connects two electrolytes and a small current is enforced between the cathode and anode.
Source: Wikipedia — Dynamic hydrogen electrode (CC BY-SA 4.0)