Abstract: For measuring an analyte in a liquid, a test strip and apparatus each have an asymmetry. The asymmetries combine to permit a test strip to be inserted into the apparatus when it is correctly aligned but prevent the test strip from being fully inserted if it is wrong side up. The apparatus also detects whether or not the strip has been fully inserted.

Abstract: The present invention concerns a three dimensional conductive organic polymer covered micro structure having improved current carrying capacity as compared to a substantially smooth surface. More specifically, it relates to a three-dimensional poly(aniline) or poly(pyrrole)-substrate micro structure for use as a battery electrode, having improved properties as compared to a substantially smooth surface, which structure comprises: a thin surface layer of poly(aniline) or poly(pyrrole) film on a substrate surface, wherein the polyaniline or poly(pyrrole) film has a thickness of between about 0.1 and 10 microns and the substrate surface is irregular or patterned having a protruding surface, wherein representative protrusions amount to between about 40 to 90 percent of the surface of the electrode. The processes to produce the three-dimensional microstructure are also disclosed.