Abstract: A radiometric measuring device comprising: a radioactive radiator which sends radioactive radiation through a container; and a detector serving to receive a radiation intensity penetrating through the container, dependent on the physical, measured variable, and to convert such into an electrical output signal. The detector includes a carrier, on which at least one scintillation fiber is wound, which converts radiometric radiation impinging thereon into light flashes, whose light propagates in the respective scintillation fiber toward its ends. The detector further includes at least one array of avalanche photodiodes operated in a Geiger mode, which convert light impinging thereon into an electrical signal. The detector also has a measuring device electronics connected to the avalanche photodiodes for producing the electrical output signal, based on the electrical signals of the avalanche photodiodes.

Abstract: A radiometric measuring device for measuring a physical, measured variable, especially a fill level or a density, of a fill substance located in a container, and/or for monitoring an exceeding or subceeding of a predetermined limit value for the physical, measured variable, comprising: a radioactive radiator, which, during operation, sends radioactive radiation through the container; and a detector arranged on a side of the container lying opposite the radiator and serving to receive a radiation intensity penetrating through the container, dependent on the physical, measured variable, and to convert such into an electrical output signal. With this measuring device, in an extremely flexibly predeterminable region to be metrologically registered by the detector, a very exact measuring of the radiation intensity can be put into practice.