GEDET is a versatile and sophisticated instrument for measurement of coatings of metal or alloy on substrates by electroplating or other methods. It is simple enough to be welcomed by operator of average skill when a large number of routine measurements on standard metallic coating are to be made. At the same time, it is sophisticated enough to be employed by a scientist for his investigation purposes on metallic and alloy coatings. It works on Coulometric principle. It has a very high accuracy and repeatability. It can measure thickness on flat or curved surfaces. GEDET also measures coating on known length of wire or pins using Acrylic cell which is supplied as an accessory.