Measuring instruments in the nature of skin measuring, skin testing, and skin analyzing devices for measuring, recording, analyzing and identification of a variety of skin conditions, namely, sensors for measuring and displaying pH value, lipid, hydration, erythema, melanin density, phototype, keratinization, skin texture, structural integrity, pore density, pigmentation, sun protection, vascular anomalies, wrinkle concentration or quantification of the skin, and for determining an individual...