The invention relates to designs of installations for irradiation current media and can be used in installations intended for sterilization of the flowing fluid, the activation of chemical reactions in current solutions, nuclear transformation current radioactive waste used in particular in medicine, food, chemical and nuclear industries . The technical result of the utility model is to provide control of the radiation dose absorbed by the current environment, due to: improve the spatial uniformity of the current flow of the medium at the input, the separation conduit into sections measuring radiation absorbed by the current environment, in different parts of the cross-section its flow control irradiation time flowing medium by determining its flow rate through the device. The technical result is achieved in that the device for irradiating a flowing medium comprising a cylindrical chamber with connections for supply and discharge of the flowing medium, the radiation source comprising an emitter disposed coaxially in the chamber, the sensor, the controller operatively associated with the sensor, wherein the nozzles are spaced on height relative to one another, the chamber is in the form of two coaxial cylindrical tubes, between which a volume is divided into equal sections by radial partitions and is connected to the differential m a pressure sensor, the inner tube is connected with the space outside the chamber, the emitter mounted on the axis of the chamber to be movable along this axis, the diameter of the outer chamber D of the pipe to meet D relation to
