The Nix Qnix Fe5mm magnetic thickness probe uses the principle of magnetic Induction thickness measurement, the thickness measurement range is 0~5000 μm, and the Measurement accuracy is +/- (1 µm + 2% of the reading) at < 2.0mm; +/- 3% of the reading at > 2.0mm. It is an optional probe for the Qnix5500 and Qnix9500 series Thickness Gauges.