The Triplett CTT47 Coating Thickness Tester with USB uses smart automatic recognition of ferrous (magnetic induction) and non-ferrous (eddy current measurement) substrates. Ideal for paint shops and electroplaters, chemical, automobile, shipbuilding, and aircraft industries. The CTT47 use in the laboratory, workshop, or field. It has an easy-to-use menu, 8 level adjustable backlight, two point calibration with Zero adjust, and two working modes: Direct and Group. The CTT47's built-in memory stores up to 1500 readings (30 Group readings). The CTT47's readings can be transferred to a PC via the USB interface. 1 year warranty.