Patent ID: 8878136

Claim:
A radiometric measuring device for measuring a physical, measured variable, 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 is mounted on the exterior on the container and, during operation, sends radioactive radiation through the container; and a detector, which is mounted on the exterior on the container and is arranged on a side of the container lying opposite said radiator and serves to receive a radiation intensity penetrating through the container, dependent on the physical, measured variable, and to convert such into an electrical output signal, said detector having: a carrier, on which at least one scintillation fiber is wound, which converts radiometric radiation impinging thereon into light flashes, whose light propagates in said respective scintillation fiber toward its ends; at least one array of avalanche photodiodes operated in Geiger mode for converting light impinging thereon into an electrical signal, wherein at least one end of each of said scintillation fiber is connected to an avalanche photodiodes of one of the arrays; and a measuring device electronics connected to said avalanche photodiodes, which, based on the electrical signals of said avalanche photodiodes, produces the electrical output signal.