BENETECH GT235 LCD Coating Thickness Gauge Paint Thickness Gauge Meter Car Paint Depth Gauge Tester 0~1800μm for Car Automobile Features: Basic Functions: it can measure the thickness of the non-magnetic coating on the magnetic metal substrate, and the thickness of the non-metallic coating on the non-magnetic metal substrate. Smart Gauge: automatically identifying non-magnetic and magnetic metal substrate. 3 Measurement Modes Switchable: Single measurement(SNG), continuous measurement(CTN) and differential measurement(DIF) available, short press the MODE button to switch. Calibration Operation: including zero-point calibration, offset calibration and basic calibration. Metric and Imperial Measuring Units: short press the UNIT button to switch among μm(metric), mil(imperial), and mm(metric) in turn. More Features: LCD display.