Testing performance is both non-destructive and extremely accurate. With this state of the art thickness gauge, you can easily detect the thickness of nonmagnetic coating on a magnetic substrate (ferrous) or an insulating coating on a non-magnetic conductive substrate (non-ferrous) utilizing either an integrated probe or our version that comes with 1 auto-detect external probe. Main Technical Data • Measuring range: 0-2000 µ m max. or 0-80 mils • Resolution: 0.1µ m / 0.01mils(0-99µ m) or 1µ m (over 100µ m) • Guaranteed tolerance: After one-point calibration: +/- 1-3%n or 2µ m (whichever is greater) • Display: 4 digits (digit height = 10mm/0.4”) • Min. measuring area: 0.2” x 0.2” (5mm x 5mm) • Min. radius of curvature: Convex: 0.12” (3mm) Concave: 1.2” (30mm) • Min. substrate thickness: Ferrous: 20 mils (0.5mm) Non-ferrous: 2 mils (50 µ m) • Calibration: Zero Calibration Foil calibration • Max. Surface temperature of test object: 302 degrees F (contact time max is 2 seconds) • Power source: 4 AA batteries • Dimensions: 161 x 69 x 32mm • Weight: 9oz. (260g)