A mono-layer electrode sensor suitable for a multitude of electrophysiology testing applications is disclosed. The electrode sensor can include a mono-layer of conductive film shaped with a soft-form geometry that is modifiable to a targeted size tailored to a patient. The conductive film includes a sensing area that is complementary to a size and morphology of a body structure of the patient. The conductive film can have a connector coupled to the sensor, and the skin adherent side can have a bio-compatible hydrogel coated there over including a non-conductive material formed over the connector portion of the conductive film.