Coating Thickness Gauge

F type probe: measure the thickness of non-magnetic coatings (zinc, copper, enamel, plastic and so on) on magnetic subtracts (iron, steel)
N type probe: measure the thickness of non-conductive coatings (varnish ,enamel, plastic and so on) on conductive subtracts (zinc, copper, aluminum)
V-type probe to measure the cylinder easier
Single and continuous working mode
Low and high limits setting with judgement
With average calculation function