Abstract: A method is disclosed for operating a flowmeter, such as an inductive flowmeter, in which a medium flows through a measuring tube, and an arrangement of electrodes are conductively connected to the medium. To determine a filling level in a simple and reliable manner, at least four electrodes are arranged in the measuring tube essentially in a half-circumferential region based on a cross section through the measuring tube. When at least one signal is fed in at one of the electrodes or at one of the electrode pairs, an electrical current is measured at an electrode or between an electrode pair. An electrical voltage is measured between at least one other electrode pair or with respect to a common connection to ground. When comparing measurements with two different electrode combinations, different voltage and current values are related to infer a diagnosis, such as a filling level in the tube, and/or an electrode coating, and/or an oblique installation, and/or a sedimentation at a bottom of the tube.

Abstract: A magnetoinductive flow meter has an electromagnet unit which is mounted on an outside periphery of a measuring tube. The electromagnet unit can include magnetic flux-concentrating device and electric coils for generating a magnetic field which is oriented substantially perpendicular to the direction of flow of a measuring medium which flows through the measuring tube. The magnetic flux-concentrating device of the electromagnet unit can include ferrite pole cores each respectively associated with each one of the electric coils. A single magnet yoke composed of an electric sheet material can be connected to each ferrite pole core. The magnet yoke can surround the electric coils jointly in a clip-like manner.

Abstract: A method is disclosed for operating a flowmeter, such as an inductive flowmeter, in which a medium flows through a measuring tube, and an arrangement of electrodes are conductively connected to the medium. To determine a filling level in a simple and reliable manner, at least four electrodes are arranged in the measuring tube essentially in a half-circumferential region based on a cross section through the measuring tube. When at least one signal is fed in at one of the electrodes or at one of the electrode pairs, an electrical current is measured at an electrode or between an electrode pair. An electrical voltage is measured between at least one other electrode pair or with respect to a common connection to ground. When comparing measurements with two different electrode combinations, different voltage and current values are related to infer a diagnosis, such as a filling level in the tube, and/or an electrode coating, and/or an oblique installation, and/or a sedimentation at a bottom of the tube.

Abstract: A flowmeter is provided to have a measuring tube, in or on which a measuring system is arranged. The flowmeter includes pinch seal sleeves which are arranged at both ends of the measuring tube for connecting the measuring tube to a process pipeline. According to an exemplary configuration, the pinch seal sleeves and/or the inner surfaces of the pinch seal sleeves are composed of an electrically insulating material and/or coated with an electrically insulating material. To make the device lighter in enable fast installation, the measuring tube can be made flangeless.

Abstract: A magnetoinductive flow meter has an electromagnet unit which is mounted on an outside periphery of a measuring tube. The electromagnet unit can include magnetic flux-concentrating means and electric coils for generating a magnetic field which is oriented substantially perpendicular to the direction of flow of a measuring medium which flows through the measuring tube. The magnetic flux-concentrating means of the electromagnet unit can include ferrite pole cores each respectively associated with each one of the electric coils. A single magnet yoke composed of an electric sheet material can be connected to each ferrite pole core. The magnet yoke can surround the electric coils jointly in a clip-like manner.

Abstract: The invention relates to a special electrode surface for electrodes of a flow measuring device. In order to provide more measurement reliability for abrasive substances to be measured, for example in multiphase substances to be measured, according to the invention the size of the active electrode surface (3) is optimized independently of the size of the electrode (2) to be sealed in by means of a coating (4) so that an electrically nonconductive coating leaves free only the electrically active surface (3).

Abstract: The invention relates to a special electrode surface for electrodes of a flow measuring device. In order to provide more measurement reliability for abrasive substances to be measured, for example in multiphase substances to be measured, according to the invention the size of the active electrode surface (3) is optimized independently of the size of the electrode (2) to be sealed in by means of a coating (4) so that an electrically nonconductive coating leaves free only the electrically active surface (3).

Abstract: The invention relates to a method for operating a flowmeter according to the generic part of claim 1. In order to make it possible to generate signals in an optimal manner in all conditions, the actual signal-to-noise ratio is automatically determined in the signal processing unit of the flowmeter during the measurement phase, and the power supplied to the measurement system is adjusted in accordance with the result.

Abstract: A flow meter has a measurement tube, in or on which the measurement system is arranged. In order to make the device more lightweight and to achieve faster installation, the measurement tube is flangeless.

Abstract: The invention relates to a magnetic-inductive measuring device for flowing substances with at least one subsystem respectively for carrying the substances, recording measuring signals through a signal pickup, generating a magnetic field through at least two exciting coils and a ferromagnetic core and bounding the measuring device on the ambient side of the housing. The measuring device is characterized in that at least one of the subsystems is entirely or partly formed by layers of fibre composite material and/or is embedded in layers of fibre composite material.

Abstract: The invention relates to a magnetic-inductive measuring device (1) for flowing substances (substance being measured), with a measuring tube (2) and a further subsystem respectively for recording measuring signals, comprising a signal pickup (electrode arrangement (20, 22) for signal tapping), for generating a magnetic field, comprising at least two exciting coils (30) and a ferromagnetic core (32) (magnetic system), and for bounding the device on the ambient side (housing), and is characterized in that at least one of the further subsystems is entirely or partly formed by a casting compound and/or embedded in a casting compound.

Abstract: Electrode in an internally lined measurement tube of a magnetic-inductive flowmeter, having an electrically conductive mount which can be loaded mechanically, characterized in that the mount is provided at least on its side facing the measurement tube interior with a multilayer film, comprising at least one first electrically conductive thin film composed of an element of the first or the eighth group in the fourth, fifth or sixth period of the periodic table of the elements, as well as a second electrically conductive thin film, which covers the first thin film and has good resistance to abrasion and corrosion.

Abstract: The invention relates to a magnetic-inductive measuring device (1) for flowing substances (substance being measured), with a measuring tube (2) and a further subsystem respectively for recording measuring signals, comprising a signal pickup (electrode arrangement (20, 22) for signal tapping), for generating a magnetic field, comprising at least two exciting coils (30) and a ferromagnetic core (32) (magnetic system), and for bounding the device on the ambient side (housing), and is characterized in that at least one of the further subsystems is entirely or partly formed by a casting compound and/or embedded in a casting compound.

Abstract: The invention relates to a magnetic-inductive measuring device (1) for flowing substances (substance being measured), with at least one subsystem respectively for carrying substance (hydraulic system, measuring tube) (2), for recording measuring signals, comprising a signal pickup (electrode arrangement (20, 22) for signal tapping), for generating a magnetic field, comprising at least two exciting coils (30) and a ferromagnetic core (32) (magnetic system), and for bounding the device on the ambient side (housing), and is characterized in that at least one of the subsystems is entirely or partly formed by layers of fibre composite material and/or is embedded in layers of fibre composite material.

Abstract: The invention relates to a flange connection, in particular for connecting the measuring pipe (6) of a measuring device for fluid substances to a process pipeline (4), comprising a flange disc on the device side (22) and a flange disc on the line side (22a), the flange disc on the device side (22) having an inner circumferential surface (24) and an outer circumferential surface, and it being possible for the pipe wall of the measuring pipe (6) to be formed, at least at the end zone of the pipe (8), by layers of different materials lying one on top of the other, and is characterized in that the pipe wall of the measuring pipe (6) has a radially outwardly pointing formation (12) at the end zone of the pipe (8), and in that in the installed state axial tensile forces can be transmitted from the flange disc on the device side (22) to the measuring pipe (6) via the formation (12).