Application: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. Model: cm8828fn In built probe(s) Operating principle: magnetic induction/eddy current (f/nf) 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 Weight: 81g(not including battery) Optional accessories: other range 0-200um to 15000um Rs-232c cable & software: 1.Usb adaptor for rs-232c 2.Bluetooth interface.