COATING THICKNESS GAUGE Coating thickness meter is widely used for measuring thickness and corrosion of pressure vessels,chemical equipment,boilers,oil storage tanks,etc.In industries of petroleum,shipbuilding,power station,and machine manufacturing. Operating principle:  CM-8826F: 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)   CM-8826N: 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)   CM-8826FN: F type & NF type  Specifications:  With separate 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-+45C(32F-104F), =90%RH  Dimensions: 126x65x27mm (5x2.6x1.07 inch)  Weight: 81g / 0.18(not including battery)  Optional accessories: other range 0-200um to 15000um