![]() By measuring changes in the magnetic field, the gauge can determine paint thickness.Įddy currents are used to measure the thickness of non-conductive coatings on non-magnetic metal surfaces such as aluminium or non-ferrous stainless steel.Ī coil carrying a high frequency alternating current causes eddy currents in the substrate. More advanced paint thickness gauges use either electromagnetic induction or eddy currents.Įlectromagnetic induction is used to measure thickness of non-magnetic coatings on magnetic surfaces such as steel.Ī coil system generates an electromagnetic field that is affected by the magnetic substrate. The gauge gives a readout in μm (micrometre/micron). ![]() This correlates to paint thickness – the more the required force the thicker the paint. A sensor then measures how much force it has taken to pull off the magnet. Increasing tension is applied to a spring connected to the magnet. Once you place the gauge on the surface, a magnet attaches to the surface.įor this type of gauge to work, the surface underneath has to be a ferrous (magnetic) material like steel. Some paint thickness gauges use a permanent magnet to measure paint thickness. Blue Technology P 11-S-AL Paint Coating Thickness Meter Prodig-Tech GL8s Digital Car Paint Layer Thickness Meter Amgaze Digital Ultrasonic Thickness Meter Tester Digital CEM DT-156 Paint Coating Thickness Meter 4 The Best Paint Thickness Gauge Reviews. ![]()
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