COATING THICKNESS GAUGE Features: Two Models DFT-F measures non-magnetic coatings on steel. DFT-FN, measures both non-magnetic coatings on steel AND non-conductive coatings on aluminum, brass, etc.  Automatically recognizes the substrate and takes a measurement. Includes NIST Traceable Calibration Cert No calibration required for most applications Strong, wear resistant, ruby-tipped probe V-groove in probe for positioning on cylindrical parts Basic instructions on the back of each gauge ZERO feature for rough or curved surfaces Handy RESET feature when no zero reference is available Audible and visible measurement indication Mils/Microns switchable The DFT Coating Thickness Gage measures the thickness of coatings on ALL metals. Accurate and economical the DFT is the ideal instrument for Powder Coaters, Paint Applicators, Coating Inspectors... Easy-to-read oversized LCD display is reversible for reading when inverted. Includes: probe, wrist strap, plastic shims, calibration certificate, hard shell storage case, AAA battery, instructions, and two (2) year warranty. Specifications: Measuring Range:   0 - 40 mils ( 0 - 1000 µm) Accuracy:   ±(0.1 mils + 3%) (±(2µm + 3%)) Size:  4 x 1.5 x 0.9 in (100x38x23 mm) Weight:  2.5 oz (70 g)