[en] The invention deals with measurement of nuclear and ionizing radiations and can be used in dosimetry, radiometry and nuclear geophysics. Device for measurement of the ratio of pulsed fluxes intensities, containing controlled current generator and accumulating capasitor, electron key and measuring device connected in parallel, is very close in its technical essence to the suggested one. The device suggested permits to compensate for the effect of inlet resistance of measurement device on measurement results and thus to increase the accuracy of measurements as well as to simplify the whole construction of the device at the expense of application of simple measurement devices with comparatively low inlet resistance