Multi-functional water quality sensor

A dynamic mode of operating a three electrode setup for ORP and pH documentation of a media comprising:

• establishing a first constant potential or a first constant current between a working electrode and a counter electrode and documenting a first documented potential between the working electrode and a reference electrode;
• establishing a second constant potential or a second constant current between the working electrode and the counter electrode and documenting a second documented potential between the working electrode and the reference electrode;
• determining a difference between the first and second documented potentials between the working and reference electrodes as a measure of a pH of the media;
• and
• using the first documented potential, the second documented potential, or a third documented potential as a measure of ORP of the media, wherein the third documented potential includes establishing a third constant potential or a third constant current between the working electrode and the counter electrode and documenting the third documented potential between the working electrode and the reference electrode.