Electrochemical sensor including multiple work electrodes and common reference electrode

A method of forming an electrochemical sensor, the method comprising:

• providing a dielectric substrate defining a first major surface;
• forming an interconnect layer on the first major surface to define a second major surface opposite the first major surface;
• forming a common reference electrode;
• forming at least one counter electrode;
• and
• forming a work electrode platform comprising a plurality of respective work electrodes on at least a portion of the second major surface,
• wherein the interconnect layer electrically couples the common reference electrode and the at least one counter electrode to each respective work electrode of the plurality of respective work electrodes, and
• wherein each respective work electrode of the plurality of respective work electrodes comprises a respective reagent substrate configured to react with a respective analyte to produce a signal indicative of a concentration of the respective analyte.