The text of this paper is concerned to the sources of gamma-ray radiation in modern devices of nondestructive testing and etr. Questions of computer construction and modulation of measuring system are considered. Тhе second part of this article is denote to data transmission on the different distance. The results have shown that the most considerable changes are noted to the application of modern system of radiation control and computer designing allows creating the complex monitoring system with safe management for the system of radiating control.