... steel, iron, non-austenitic stainless steel.2, Four digitals LCD display, differentiating upto μm.3, System calibrating by user-self. ... ” optional.6, Micro-controller controls, high accuracy .7, Coupling state display.8, Shut down manually or automatically.9, Low battery voltage indication ... m).6, Measurement rate:0.5 second.7, Display units:μm or mil.8, Critical thickness of metallic base:1mm.9, ...