NMR measuring apparatus comprising at least one sensor device specifically configured for intracorporeal arrangement in a human or animal body and comprising at least one other non-biocompatible and non-biofunctional part configured for extracorporeal arrangement, the sensor device at least comprising: • a magnet device for creating a homogenous magnetic field B0, • an inductive detection device for transmitting a nuclear magnetic resonance excitation signal and for receiving a nuclear magnetic resonance signal, for which purpose the inductive detection device comprises at least one RF coil, and • an application-specific electric circuit at least for preprocessing nuclear magnetic resonance signals received by means of the inductive detection device, and • a biocompatible and biofunctional housing, the other part comprising a signal generator having a circuit for creating the excitation signal, the NMR measuring apparatus being configured for intracorporeal measurement of NMR spectra by means of the sensor device, the inductive detection device of the sensor device being inductively couplable to the signal generator of the NMR measuring apparatus for the purpose of input coupling the excitation signal when said signal generator is arranged extracorporeally, and the NMR measuring apparatus having a means suitable for inductive coupling, by means of which the excitation signal created by the extracorporeal signal generator is wirelessly input-couplable into an intracorporeally arranged resonant circuit of the inductive detection device formed by means of at least the RF coil. the sensor device at least comprising: • a magnet device for creating a homogenous magnetic field B0, • an inductive detection device for transmitting a nuclear magnetic resonance excitation signal and for receiving a nuclear magnetic resonance signal, for which purpose the inductive detection device comprises at least one RF coil, and • an application-specific electric circuit at least for preprocessing nuclear magnetic resonance signals received by means of the inductive detection device, and • a biocompatible and biofunctional housing, • a magnet device for creating a homogenous magnetic field B0, • an inductive detection device for transmitting a nuclear magnetic resonance excitation signal and for receiving a nuclear magnetic resonance signal, for which purpose the inductive detection device comprises at least one RF coil, and • an application-specific electric circuit at least for preprocessing nuclear magnetic resonance signals received by means of the inductive detection device, and • a biocompatible and biofunctional housing, the other part comprising a signal generator having a circuit for creating the excitation signal, the NMR measuring apparatus being configured for intracorporeal measurement of NMR spectra by means of the sensor device, the inductive detection device of the sensor device being inductively couplable to the signal generator of the NMR measuring apparatus for the purpose of input coupling the excitation signal when said signal generator is arranged extracorporeally, and the NMR measuring apparatus having a means suitable for inductive coupling, by means of which the excitation signal created by the extracorporeal signal generator is wirelessly input-couplable into an intracorporeally arranged resonant circuit of the inductive detection device formed by means of at least the RF coil.