The CaratScreenPen makes it possible to determine the content (carat number) on the surface of, for example, gold jewellery of all shapes and colours, as well as recycled scrap gold in just a few seconds. The compact gold tester to determine the carat number of gold jewellery quickly and easily - the measurements are taken by placing the measuring pen on the test object - the result is obtained after just a few seconds. Suitable for determining the carat number of jewellery, gold, palladium, platinum, rhodium.