In this reaction, carbon is oxidised because it gains oxygen. At the same time, copper oxide is reduced because oxygen is removed from it.

Oxidation reduction potential (ORP) instruments, also known as redox potential instruments, are used to monitor chemical reactions. ORP instruments measure the ability of a solution to act as an ...

They are part of an ORP instrument, which also includes a metal half-cell, a reference cell, and a user interface. Oxidation reduction is a type of chemical reaction in which electrons are transferred ...