Radiometric density measurement

A radiometric measuring device, comprising:

• at least one at least partially bent source receiving tube configured to receive a radiation source;
• and
• at least one transmission tube configured to provide a guiding path within the transmission tube for at least a portion of radiation emitted by the radiation source,
• wherein the source receiving tube and the transmission tube are arranged relative to each other such that at least a portion of the radiation emitted by the radiation source is guidable in a straight line through a material disposable between the radiation source and a distal end of the transmission tube and the guiding path,
• wherein the source receiving tube and the transmission tube are arranged adjacent to each other, and
• wherein the source receiving tube is not disposed within the transmission tube.