Car Coating Gauge Digital Automotive Paint Thickness Meter 0‑2000um F NF Automatic Detection Zero Calibration Red Item Type: Coating Thickness Gauge Model: HW 300MINI Material: ABS Magnetic Induction: Measurement principle (F probe), vortexing effect (N probe) Measurement Range: 0-2000um Measurement Accuracy: ±(3%+1UM) Unit: Um, mm, mils Zero Point Calibration: Support Minimum Convex Curvature: 5mm Minimum Concave Curvature: 25mm Minimum Measurement Area: 20mm / 0.8in Diameter Minimum Substrate Thickness: 0.2mm (F probe), 0.05mm (N probe) Maximum Measurement Speed: 2 readings per second Power Supply: 2 x 1.5V AAA batteries (battery not included) Working Environment: 0-50℃, 20-90% relative humidity (non condensing) Storage Environment: -10-60℃, 20-90% relative humidity (non condensing)