.coating thickness meter cm-8822 application: 1. can measure the thickness of non-magnetic coating layers(aluminum, chrome, copper, ename1, rubber, paint) on magnetic substrate (steel, iron, alloy and magnetic stainless steel) 2. can 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) product synopsis model: cm8822 operating principle: magnetic induction/eddy current (f/nf) measuring range:0-1000um 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 aa(um-3)battery auto power off operating conditions:0-+45℃(32℉-104℉),≤90%rh dimensions: 160x68x32mm weight:  250g(not including battery) optional accessories: other range 0-200um to 15000um