Fnirsi CTG-20 Car Paint Coating Thickness Gauge Tester Specification: 1. Measuring range: 0~1400um 2. Accuracy: +-3%+2um 3. Resolution ratio: 0.1um 4. Calibration: Zero-point calibration, multi-point calibration 5. Unit: um, mil 6. Minimum convex curvature radius: 5mm 7. Minimum concave curvature radius: 25mm 8. Minimum measurement area diameter: 20mm 9. Humidity: 20%~90% RH 10. Battery: 600mAh Lithium battery 11. Data Storage: Support 12. Putty Powder Test: Support 13. Rotatable Screen: Support 14. Auto Power Off: Support 15. Size: 115 x 48 x 18mm Features: 1. A highly sensitive probe automatically identifies the substrate, taps to measure, and gets data in seconds 2. Triple use for Iron, Aluminum, and Zinc, with comprehensive detection 3. Two measurement modes; long press "Save" to lock and view max, min, ave, and real-time values; short press "Save" to rotate the screen to meet your measurement needs 4. Supports identification of iron powder putty with prompt indication, enhancing reliability during vehicle inspection 5. Dual unit quick switching; um and mil units can be freely switched to make measurement data clearer 6. Quick zero calibration; faster, more accurate, and reliable; short press the "ZERO" button to perform zero calibration 7. Automatically detects substrate and measures coating thickness through electromagnetic induction and eddy current effects 8. Exquisite and compact one-handed grip; 115mm compact body; lightweight and portable; easy to carry in a pocket 9. Equipped with a 600mAh rechargeable lithium battery; can be used for 8 hours on a single charge; no need for repeated battery replacement; environmentally friendly and convenient 10. Automatic shutdown after inactivity; auto power-off can be set; device automatically shuts down after 5 minutes of no operation to extend battery life