VDIAGTOOL VC100 Digital Coating Thickness Gauge, Car Paint Metal Coating Probe Tester. Its used to measure the thickness of Non-Metallic Coating (such as paint, film, etc.) on metal substrate quickly, non-destructively, and accurately. It is mainly used to measure the thickness of the vehicles surface paint and other coatings. Help second-hand car buyers to evaluate car accidents. This car paint thickness probe is powered by 2 button batteries which are included in the package.Vehicles Coating Tickness Measuring + Vertical 90 TestThis portable gauge measures the coating thickness of vehicles. Help second-hand buyers to evaluate if any accidents happen to the car. When measuring, the tester must be perpendicular to the tested surface (90). Precise Fe & NFe ProbeHD Backlight Mode + 2 Units Conversion + Highly Sensitive ProbeWith a digital LCD backlight, this car paint thickness meter can read data clearly in a dark environment. The measurement unit can be switched between mm and mil to facilitate different requirements. High sensitivity probe makes measurement quickly and accuratelyWorking PrincipleThis car paint thickness tester uses the Magnetic Induction Measurement Principle. The thickness of the coating is measured by the magnitude of the magnetic flux flowing, from the probe through the non-ferromagnetic coating into the ferromagnetic substrate