BENETECH GT235 Iron-aluminum Dual-purpose Paint Film Coating Thickness Gauge Features 1. Measuring the thickness of non-magnetic coating on the magnetic metal substrate. 2. Measuring the thickness of the non-metallic coating on the non-magnetic metal substrate. 3. Automatically identifying the non-magnetic metal substrate and magnetic metal substrate. 4. Single measurement, continuous measurement and differential measurement available. 5. Zero-point calibration, Offset Calibration and basic calibration available. 6. Metric and imperial units of measurement optional. 7. LCD backlight. 8. Automatic shutdown. Specification 1. The measurement range: 0 ~ 1800pm 70.8mi18mm 2. Resolution: (0.1 um(less than 100um), pm( greater than or equal 100pm)0.1mil 0.001mm less thano r equal 150um, +-5um 3. Measurement error: Greater than 150 um,+-(3%H+1pm) 4. The lower limit diameter of magnetic matrix: 12mm 5. The lower limit thickness of magnetic matrix: 0.5mm 6. The lower limit curvature radius of magnetic convex matrix: 2mm 7. The lower limit curvature radius of magnetic concave substrate: 11mm 8. The lower limit diameter of nonmagnetic matrix:50mn 9. The lower limit thickness of non-magnetic substrate: 0.5mm 10. Operating temperature: 20 ~ + 40 degree C (it is recommended to use the working temperature range in different environments, especially when the temperature difference is large, it needs to be recalibrated before use) 11. Working humidity range: 10 ~ 95% RH 12. Battery 1.5V AAA alkaline battery x 2 (not included) 13. Dimension: 62 x 27 x 121.5mm 14. Weight: 105.03g