NUCLEAR MAGNETIC FLOWMETER AND METHOD FOR OPERATING A NUCLEAR MAGNETIC FLOWMETER

摘要

Described and shown is a nuclear magnetic flowmeter (1) for determining the flow of a medium flowing through a measuring tube (2), having a magnetic field generator (3) consisting of permanent magnets for generating a magnetic field interfusing the medium over a magnetic field section LM, having a pre-magnetization section LVM located within the magnetic field section LM and having a measuring device also located in the magnetic field section LM including a coil-shaped antenna (5) with the length LI serving as a measuring antenna. According to the invention, at least one coil-shaped antenna (5) is provided in the pre-magnetization section LVM for generating a pulse spoiling the magnetization of the medium in the direction of the magnetic field or a pulse sequence spoiling the magnetization of the medium in the direction of the magnetic field. (Fig. 1) Fig.1 K LvM 5 L 5 5 5 5 l 4 2 Fig.2