This digital gauge is often called a Paint Thickness Gauge or a Digital Coatings Meter, it measures a range of coatings, including paint, on both steel and aluminium body panels. The quality build and design makes this gauge suitable for use in a workshop and for use in a mobile situation, out on the road. This PTG Combination has two modes F (Ferrous) and NF (Non-Ferrous) which it automatically switches between when presented with differing base metals of panels: The Ferrous Mode will read the thickness of paints and coatings on Steel, Iron, Mild Steel & Magnetic Stainless Steel substrates using Magnetic Induction The Non Ferrous Mode will read the thickness of paints and coatings on Aluminium, Copper & Brass using Eddy Current. This precision gauge can also read a number of other coatings in addition to paint including: plastic, enamel, zinc and aluminium over ferrous substrates and plastic, lacquer, enamel and galvanising over non-ferrous substrates. This is done with the gauge automatically recognising the substrate material and switching between ferrous and non-ferrous methods. The digital display has a high resolution and gives an exact reading in either micron or mil. The Paint Thickness Gauge comes with test steel and aluminium sample plates and calibrated slides to ensure it is and remains accurate. A handy case is also included to protect the gauge when not in use. This Paint Gauge allows two group mode; direct(DIR) and general (gen), readings will be lost when powered off in direct mode, and up to 80 readings can be stored in general mode that are transferable with a USB interface connection to your computer. This allows the user to recall, delete and store specified readings from the gauge in different groups. This gauge conforms to Quality Standards: ISO2178, ISO-2360, DIN, ASTM and BS. The resolution on screen is 0.1 µm (0-99.9 µm) and 1 µm (over 100 µm) The ideal operating conditions are 0-50C (32F-104F),