Sealed radiation sources with low activities, emitting α particles have found various practical applications. For example: sources with americium have been applied in smoke detectors.In this report the application of track autoradiography to diagnostics of quality and stability of americium sources made using various technologies is discussed.The homogeneity of sources and tightness of protective layers on their surfaces were examined. Characteristics of the emitted α radiation before and after abrasion tests were carried out.