| 摘要 |
The invention relates to a thickness gauge (1) for non metallic materials (4) in the form of foil, film, tape or the like which comprises first non contact measuring means (3), designed to measure the distance of the faced material surface, and second non contact measuring means (5), designed to measure the distance of a metal reference surface (6), said first and second measuring means (3, 5) being installed on one side of a space for receiving the material (4) and operating in two coaxial spatial regions, so that their measurements refer to a same measuring axis (8), wherein the first non contact measuring means (3) is a backscattering fluid sensor.
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