Operating principle:  F type & NF type
　　F type(magnetic induction): measure the thickness of non-magnetic coating layers such as
　　(aluminum,chrome,copper,ename1,rubber,paint) on magnetic substrate (steel, iron, alloy and
　　 magnetic steel) 
　　NF type (eddy current): measure the thickness of non-conductive coating layers (ename1, rubber,
　　paint, vanish, plastic anodic oxide layer) covered on non-ferrous substrate (aluminum, brass, zinc,
　　tin and non-magnetic stainless steel) 

　　Specifications:
　　In built probes
　　Measuring range: 0-1250um/0-50mil
　　Resolution: 0.1/1
　　Accuracy: ±1-3%n or ±2.5um
　　Min. measuring area: 6mm
　　Min. sample thickness: 0.3mm
　　Battery indicator: low battery indicator
　　Metric/ imperial: convertible
　　Power supply: 4x1.5V AAA(UM-4)battery
　　Auto power off
　　Operating conditions:0-+45℃(32℉-104℉), ≤90%RH
　　Dimensions: 126x65x27mm
　　Wight: 81g(not including battery)
　　Optional accessories: other range 0-200um to 15000um