A measuring device for measuring a dielectric constant of contents, comprising: - a signal generating unit which is designed - to control a transmitting unit by means of a high-frequency electrical signal (S HF) such that the transmitting unit emits a radar signal (S HF) toward the contents, - a receiving unit which can be arranged in the container so as to receive the radar signal (S HF) after it has passed through the contents as a received signal (e HF), and - an evaluation unit which is configured, at least by reference to the received signal (e HF), ∘ to ascertain an amplitude of the received signal (e HF), a phase shift of the received signals (e HF) to the high-frequency signal (S HF) and/or a signal propagation time of the radar signal (S HF) between the transmitting unit and the receiving unit, and ∘ to determine dielectric constant by reference to the ascertained signal propagation time, the phase shift and/or the ascertained amplitude, wherein a transmitting layer for the radar signal is attached upstream of the radiators with respect to the other unit (12, 13) in each case, wherein the transmitting unit and the receiving unit comprise a corresponding number of at least two lines (201, 202, 203) arranged one above the other, wherein at least two radiation elements are arranged per line (201, 202, 203), wherein at least one delay element is arranged upstream or downstream of the radiation elements in each line (201, 202, 203) such that the received signal (e HF) received by the radiation elements is delayed by in each case a defined increasing or decreasing phase with increasing lines (201, 202, 203). - a signal generating unit which is designed - to control a transmitting unit by means of a high-frequency electrical signal (S HF) such that the transmitting unit emits a radar signal (S HF) toward the contents, - a receiving unit which can be arranged in the container so as to receive the radar signal (S HF) after it has passed through the contents as a received signal (e HF), and - an evaluation unit which is configured, at least by reference to the received signal (e HF), ∘ to ascertain an amplitude of the received signal (e HF), a phase shift of the received signals (e HF) to the high-frequency signal (S HF) and/or a signal propagation time of the radar signal (S HF) between the transmitting unit and the receiving unit, and ∘ to determine dielectric constant by reference to the ascertained signal propagation time, the phase shift and/or the ascertained amplitude, ∘ to ascertain an amplitude of the received signal (e HF), a phase shift of the received signals (e HF) to the high-frequency signal (S HF) and/or a signal propagation time of the radar signal (S HF) between the transmitting unit and the receiving unit, and ∘ to determine dielectric constant by reference to the ascertained signal propagation time, the phase shift and/or the ascertained amplitude, wherein a transmitting layer for the radar signal is attached upstream of the radiators with respect to the other unit (12, 13) in each case, wherein the transmitting unit and the receiving unit comprise a corresponding number of at least two lines (201, 202, 203) arranged one above the other, wherein at least two radiation elements are arranged per line (201, 202, 203), wherein at least one delay element is arranged upstream or downstream of the radiation elements in each line (201, 202, 203) such that the received signal (e HF) received by the radiation elements is delayed by in each case a defined increasing or decreasing phase with increasing lines (201, 202, 203).