The invention relates to means for measurement of intensity of ionizing radiation. Radiation monitor includes N measuring channels that are connected to block for processing and making decision and each of channels includes connected in series detector of radiation and former of pulses with equal duration. Additionally between the formers of pulses and block for processing and decision making delay elements are included, and block for processing and making decision consists of N pulse counters count inputs of which are connected to outputs of delay elements and control inputs through univibrator are connected to bus for setting period of analysis time and outputs of those are combined with element AND. The invention makes it possible to control in automated mode presence of source of radiation with high accuracy, small probability of error operations at decrease of time of analysis.
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