A nozzle for dispensing fuel into a vehicle. Also, provided are methods for utilizing the purified AM-binding proteins, or functional portions thereof, to diagnose, treat, and monitor AM-related diseases, for example, diseases or disorders associated with abnormally elevated AM levels. Each electrode is disposed so as to be opposite the other and connected to one of the conductive elements. A current-feedback circuit senses a plurality of LED currents for generating a current loop signal in response the maximum current of the LEDs. The cell thus has benefits resulting from a well-passivated, high k top dielectric in combination with a bottom dielectric of silicon oxide. a display screen; a patterned arrangement of conductors extending into said sensor situated over said display screen; and detection circuitry adapted to detect capacitive coupling of said at least one object with said at least one conductor.