Abstract: A device for accounting for environmental capacitances caused by an external object when detecting the presence and surface location of an electrically conductive coating on a transparent and/or translucent medium includes: a capacitive sensor that provides multiple capacitances; electronics that are responsive to the capacitances; an excitation source that generates a train of pulses, voltage or current to determine capacitances at the capacitive sensor; a selective indicator; and, a capacitive sensing plate that affects, or is affected by, the pulses, voltage or current from the excitation source.

Abstract: Described are methods and devices for detecting the presence and surface location of an electrically conductive coating on a transparent and/or translucent medium.

Abstract: Methods and apparatuses for measuring the thickness on at least one transparent or translucent medium and detecting the presence and/or location of any conductive coating on a non-conductive medium surface are described.

Abstract: Methods and apparatuses for measuring the thickness on at least one transparent or translucent medium and detecting the presence and/or location of any conductive coating on a non-conductive medium surface are described.

Abstract: An apparatus for detecting a fluorescing substance on a test material includes a light source configured to direct light energy toward the test material, and one or more display features configured to display fluorescing light from the test material. When light from the light source contacts the fluorescing material, display features allows the fluorescing material to project a fluorescing glow into an ambient environment near the apparatus.

Abstract: Methods and apparatuses for detecting the presence and/or location of any conductive coating on a non-conductive medium surface are described.