coating thickness gauge cm-8825 function: cm-8825f (ferrous substrate) cm-8825n (non ferrous substrate) cm-8825fn (2 in 1, f & nf type) measuring principle：magnetic induction& eddy current measurement range：0～200um/500um /1000um/2000um in built probe (integrated probe) resolution：0.1 um(under 100um) 1um (over 100um) accuracy: ±1～3%n or ±3um probe type recognition: manual (for cm-8825fn) measurement mode: single data output: rs232c interface (optional) power supply: 4x1.5v aaa(um-4)battery 2 shutdown models: manual/automatic dimension: 131x65x28mm application: 1. cm-8825f 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. cm-8825n 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