... “mil ” optional.6, Micro-controller controls, high accuracy .7, Coupling state display.8, Shut down manually or automatically.9, Low battery voltage indication ... .4, Resolution: 1μm .5, Accuracy:±(3%H+2μm).6, Measurement rate:0.5 second.7, Display units:μm or ... mil.8, Critical thickness of metallic base:1mm.9, Minimum thickness of metallic base:0.2mm.10,Minimum curvature ...