Coating thickness gauge Insize make. We have upgraded 9501-1200 model to new design. Magnetic induction probe (FE) is to measure the thickness of non-magnetic coating on magnetic substrate Substrate: iron, steel, magnetic stainless steel (does not include non-magnetic stainless steel) Coating: zinc, copper, chrome, tin, plastic, powder, paint (nickel is not included). Eddy current probe (NFE, Optional Accessories) is to measure the thickness of non-conductive coating on non-magnetic substrate Substrate: copper, aluminum, zinc, non-magnetic stainless steel Coating: plastic, powder, paint, anodizing. Low and high limits with judgement. Automatic power off.