Magneto-inductive flow meter including a device for continuous quantitative determination of the degree of filling

A flowmeter, comprising:

• a device for measuring fill level, including:
• a measuring tube for guiding a liquid, the measuring tube having a tube wall extending between a first tube opening at one end and a second tube opening at an opposite end and which surrounds a volume, in which the liquid is guided, wherein a tube axis extends between the first tube opening and the second tube opening;
• a first conductor extending at least sectionally around the volume in which the liquid is guided, wherein the first conductor is electrically insulated from the volume;
• a second conductor extending at least sectionally around the volume in which the liquid is guided and in parallel with the first conductor, wherein the second conductor is electrically insulated from the first conductor and from the volume, wherein the first conductor and the second conductor form a waveguide for microwaves;
• a high-frequency (HF) circuit for in-coupling a microwave signal into the waveguide and for receiving reflected microwave signals out-coupled from the waveguide;
• and
• an operating and evaluating circuit adapted to determine a fill level of the liquid in the measuring tube based on received microwave signals;
• and
• a magneto-inductive measuring transducer for determining a flow velocity of a liquid flowing in the measuring tube, the measuring transducer including:
• a first field coil and a first pole shoe, wherein the first field coil and its pole shoe adjoin the measuring tube above the measuring tube;
• a second field coil and a second pole shoe, wherein the second field coil and its pole shoe adjoin the measuring tube below the measuring tube and wherein the second field coil and its pole shoe are disposed opposite the first field coil and its pole shoe;
• a first electrode disposed on a horizontal diameter of the measuring tube and embodied to contact the flowing liquid;
• and
• a second electrode disposed on the horizontal diameter of the measuring tube and opposite the first electrode and embodied to contact the flowing liquid,
• wherein the operating and evaluating circuit is adapted to ascertain a volume flow through the measuring tube based on the flow velocity and the fill level.