Solid state indicator electrode and method of making same

摘要

A junction-type metal/metal oxide solid state indicator electrode (10) has the sensing portion of the electrode coated with a perfluorocarbon copolymer (12). The indicator electrode can be used in conjunction with a reference electrode to provide a pH sensor. In a preferred method of making the indicator electrode, multiple coats of perfluorocarbon polymer are applied to a metal/metal oxide electrode, each coat being dried before applying the next, and the final copolymer coating is cured, cooled and then hydrated.