Abstract: A magnetic induction flowmeter having a metal measuring tube (1), which can be inserted into a pipeline system via flanged sections (2a, 2b) at the ends, having at least two mutually opposite measuring electrodes (5a, 5b) introduced into the wall of the measuring tube (1) in an electrically insulated manner in order to register a measuring voltage, a magnetic unit (4), likewise arranged on the outside of the measuring tube (1), generating a magnetic field aligned substantially at right angles to the flow direction of the conductive flow medium to be measured, and the measuring tube (1) being provided with an electrically insulating layer (6) on the inside; in the region of the flanged sections (2a, 2b) at the end of the measuring tube (1), an expanded lattice (7) being fixed to the measuring tube (1), to which lattice the insulating layer (6) is applied in such a way that the expanded lattice (7) located within the insulating layer (6) ensures a firm connection between insulating layer (6) and measuring tube

Abstract: A magnetic induction flowmeter having a metal measuring tube (1), which can be inserted into a pipeline system via flanged sections (2a, 2b) at the ends, having at least two mutually opposite measuring electrodes (5a, 5b) introduced into the wall of the measuring tube (1) in an electrically insulated manner in order to register a measuring voltage, a magnetic unit (4), likewise arranged on the outside of the measuring tube (1), generating a magnetic field aligned substantially at right angles to the flow direction of the conductive flow medium to be measured, and the measuring tube (1) being provided with an electrically insulating layer (6) on the inside; in the region of the flanged sections (2a, 2b) at the end of the measuring tube (1), an expanded lattice (7) being fixed to the measuring tube (1), to which lattice the insulating layer (6) is applied in such a way that the expanded lattice (7) located within the insulating layer (6) ensures a firm connection between insulating layer (6) and measuring tube

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: Magnetic-inductive flowmeter, formed from a piece (1, 1a) of a pipeline (40) which has already been permanently installed in situ and in which a fluid is flowing at least temporarily, in that an electrode arrangement (32, 32a) is introduced into the piece (1, 1a) of the pipeline (40) which has already been permanently installed, and a magnet system (14) is fixed to the piece (1, 1a) of the pipeline (32, 32a) which has already been permanently installed, in the area of the electrode arrangement (32, 32a).