A measuring apparatus (505, 605, 733, 831, 902) for determining characteristics of a medium, comprising: a first waveguide device (531, 505, 605, 731) with a first feed in device (510, 734) for carrying out a first measurement; a measuring device (532, 632, 732) for carrying out a second measurement; wherein the first waveguide device (531, 505, 605, 731) is adapted for dividing a container interior into at least one first spatial region (531, 731) and into a second spatial region (532, 732); and wherein the first waveguide device (531, 505, 605, 731) is adapted for guiding a first electromagnetic wave in the first spatial region (531, 731), which first electromagnetic wave has been coupled into the first waveguide device (531, 731) via the first deed in device (510, 734); wherein the first waveguide device guides the first electromagnetic wave to the medium; wherein the measuring device (532, 632, 732) is adapted for carrying out the second measurement on the first waveguide device (531, 731) in the second spatial region (532, 732); wherein the first waveguide device (531, 505, 605, 731) is adapted for spacing apart the first feed in device (510, 734) of the first waveguide device (531, 505, 605, 731) from the measuring device (532, 632, 732) so that the first electromagnetic wave can propagate in the first spatial region at a pre-determinable distance from the second spatial region provided for carrying out the second measurement by the measuring device (532, 632, 732); wherein the first spatial region differs from the second spatial region; wherein the measuring device (532, 632, 732) is a second waveguide device (532, 632, 732) with a second feed in device (504, 631, 735), wherein the second waveguide device (532, 632, 732) is adapted for guiding a second electromagnetic wave (503, 639) in the second spatial region, which second electromagnetic wave has been coupled into the second waveguide device (532, 632, 732) via the second feed in device (504, 631, 735); wherein the second waveguide device guides the second electromagnetic wave to the medium. a first waveguide device (531, 505, 605, 731) with a first feed in device (510, 734) for carrying out a first measurement; a measuring device (532, 632, 732) for carrying out a second measurement; wherein the first waveguide device (531, 505, 605, 731) is adapted for dividing a container interior into at least one first spatial region (531, 731) and into a second spatial region (532, 732); and wherein the first waveguide device (531, 505, 605, 731) is adapted for guiding a first electromagnetic wave in the first spatial region (531, 731), which first electromagnetic wave has been coupled into the first waveguide device (531, 731) via the first deed in device (510, 734); wherein the first waveguide device guides the first electromagnetic wave to the medium; wherein the measuring device (532, 632, 732) is adapted for carrying out the second measurement on the first waveguide device (531, 731) in the second spatial region (532, 732); wherein the first waveguide device (531, 505, 605, 731) is adapted for spacing apart the first feed in device (510, 734) of the first waveguide device (531, 505, 605, 731) from the measuring device (532, 632, 732) so that the first electromagnetic wave can propagate in the first spatial region at a pre-determinable distance from the second spatial region provided for carrying out the second measurement by the measuring device (532, 632, 732); wherein the first spatial region differs from the second spatial region; wherein the measuring device (532, 632, 732) is a second waveguide device (532, 632, 732) with a second feed in device (504, 631, 735), wherein the second waveguide device (532, 632, 732) is adapted for guiding a second electromagnetic wave (503, 639) in the second spatial region, which second electromagnetic wave has been coupled into the second waveguide device (532, 632, 732) via the second feed in device (504, 631, 735); wherein the second waveguide device guides the second electromagnetic wave to the medium.