Function: The digital display thickness gauge is used to measure the thickness of galvanized sheets and metal coatings, such as steel, enamel, chrome, aluminum, copper paint and anodized paint. Accurate built-in probe: The paint film thickness gauge uses an accurate built-in probe to detect the performance of the substrate using the principle of electromagnetic induction and the effect of eddy current. Wide range of uses: The digital display coating thickness gauge is widely used in manufacturing, metal processing, chemical industry, product inspection of base and other areas. Easy to use: The feeler gauge tool's large display shows operating mode, number of readings, and current capacity. Battery power display. The operation is simple and convenient. Necessary tools for measuring thickness: The paint thickness gauge is an indispensable tool for measuring the thickness of metal coatings and coated plates. Specification: Item Type: Coating Thickness Gauge. Material: ABS Model: HW-300S Dimensions: approx. 12x4.4cm / 4.7x1.7in Weight: approx. 98g / 3.4oz Batteries: 2 AAA 1.5V batteries (not included) Magnetic induction of F-probe: measurement principle Magnetic induction thickness of N probe: eddy current effect Minimum thickness of F probe substrate: approx. 0.2 mm Minimum thickness of N-probe substrate: approx. 0.05mm Measurement range: 0-2000um Accuracy: (3%+1um) Resolution: 0um~99.9um(0.1 um), 100um~999um(1um), >1000um(0.01mm) Statistics: average, min, max, count Unit: um, mm, mils Minimum convex arc: approx. 5 mm / 0.2 inch Minimum convex arc: approx. 25 mm / 1 in Minimum measurement area: approx. 20 mm / 0.8 inch in diameter Maximum measurement speed: 2 readings per second Working environment temperature: 0-50C 20-90% RH (non-condensing) Storage temperature: -10-60C 20-90%RH (non-condensing) Uses: it can detect metal background; such as: vacuum spray paint thickness detection, guardrail paint thickness detection, window paint thickness detection, car paint thickness detection, etc.