This coating thickness gauge non-destructively measures paint, plating, and other coating layers from 0 up to 1500 microns (59 mil) on both ferrous and non-ferrous metal substrates, so it works across steel as well as aluminum and other non-magnetic bases. It adds Bluetooth with a companion app plus USB for data transfer and charging, alongside a color, screen-rotating HD display for easy reading in any orientation. It suits automotive refinishing checks, quality control, and industrial coating inspection.