This compact thickness gauge can be used for non-destructive coating thickness measurement of non-magnetic coatings (e.g. paint, enamel, chrome on steel) and insulating coatings (e.g. paint and anodized coatings on non-ferrous metals). feature: 1. 128*128 dot matrix liquid crystal display, standard menu operation; 2. Two measurement modes: single measurement and continuous measurement; 3. Two groups of modes: direct (DIR) and general (GEN), the readings will be lost in the direct mode, and the readings will not be lost in the general mode. Each group can store 80 readings; 4. Each group of zero point calibration and multi-point calibration (up to 4 points); 5. Users can call, delete specified readings, or delete group readings; 6. Statistical display: average, minimum, maximum and standard deviation; 7. Three probe modes: automatic, magnetic, eddy current; 8. The user can set the upper limit or lower limit alarm for each group; 9. Automatic power off; 10. USB interface for data transmission; 11. Low battery and error indication; Specification: 1. Measuring principle: magnetic induction (F-probe) and eddy current (N-probe); 2. Measuring range: 0 to 1300um (0 to 51.2mils); 3. Accuracy: ±(3% of reading+2um); ±(3% of reading+0.078mils); 4. Resolution: 0um~999um (1um), 1000um~1300um (0.01mm); 0 mil~39.39 mil (0.01 mil), 39.4 mil~51.2 mil (0.1 mil); 5. Calibration: one to four points calibration, zero calibration; 6. Data group: 1 direct group (readings are not stored), 4 common groups (readings can be stored), each group has separate statistics, alarm settings and calibration; 7. Statistics: number of readings, average, minimum, maximum and standard deviation; 8. Units: um, mm, mils; 9. Alarm: The user can set high/low alarm, and the alarm icon will be displayed on the LCD when the limit is exceeded; 10. Minimum radius of curvature: convex 1.5mm (59mils), concave 25mm (984mils); 11. Minimum measurement size: diameter 6mm (236mils); 12. Minimum substrate thickness: F-probe: 0.5mm (0.02"), N-probe: 0.3mm (0.012"); 13. Computer interface: download data through USB interface;