Radiometric level - or density measurement

摘要

It is a radiometric measuring instrument (10) for determining a filling level or a density of a medium (106) in a container (104) is proposed, which a plurality of scintillating optical waveguides (12) for converting an ionizing first radiation (110) in a second electromagnetic radiation (11) comprises. Further, the measuring instrument (10) at least a photomultiplier (16) for at least partially converting the second electromagnetic radiation (11) into an electrical signal and an evaluation unit (20), which is adapted to measure the filling level or the density of the medium (106) on the basis of the electrical signals to determine and a with the fill level, or the density measuring signal correlating to output. Further, the measuring instrument (10), a guiding device (14) with a plurality of recesses (15), in which, in each case one end (13) of an optical waveguide (12) is received in such a way that the optical waveguide (12) in the recesses (15) are slidable, wherein each optical waveguide (12) with the at least a photomultiplier (16) is optically coupled.n="33"