Abstract: A nuclear magnetic flow meter for measuring the flow rate of a multiphase medium which is flowing through a measuring tube with a nuclear magnetic measurement device, the nuclear magnetic measurement device being located around the measuring tube. The accuracy of the measurement of the flow rate for the gaseous phase is achieved in that, in addition to the nuclear magnetic measurement device, there is a further measurement device which implements another measurement principle, e.g. a differential pressure flow rate measurement device for measuring the differential pressure of the medium in the measuring tube. At least one pressure gauge at each of two measurement sites which are different in the longitudinal direction of the measuring tube.

Abstract: A magnetization device for permeation of a multiphase fluid flowing through a measurement tube of a nuclear magnetic flow meter with a magnetic field which is homogenous at least in one plane, with a plurality of permanent magnets for generation of a magnetic field and with a carrier, the carrier having at least one magnet receiver, each magnet receiver accommodating at least one of the permanent magnets, the shape of the magnet receivers and of the permanent magnets allowing movement of the permanent magnets in the magnet receivers only in one direction and the permanent magnets being by the magnet receivers formed by hollow profiles. The hollow profile magnet receivers can be receiving tubes for the magnets that can be turned around their longitudinal axis or the profiles can have a rotatable adapter for the magnets so that a first shimming action can be achieved with the profiles.

Abstract: A nuclear magnetic flow meter (1) for measuring the flow rate of a multiphase medium (4) which is flowing through a measuring tube (3) is described, with a nuclear magnetic measurement device (2), the nuclear magnetic measurement device (2) being located around the measuring tube (3). In accordance with the invention an improved accuracy of the measurement of the flow rate for the gaseous phase is achieved in that in addition to the nuclear magnetic measurement device (2) there is a further measurement device which implements another measurement principle, in the described exemplary embodiment a differential pressure flow rate measurement device (5). In the described exemplary embodiment the differential pressure flow rate measurement device (5) is made for measuring the differential pressure of the medium (4) in the measuring tube (3), and there are at least one pressure gauge (8a, 8b) each on two measurement sites (6a, 6b) which are different in the longitudinal direction (7) of the measuring tube (3).