Abstract: The invention relates to a vortex flow meter according to the preamble of patent claim 1. In order to provide a surface which is simple but nevertheless resistant to the substances to be measured used in the application case, according to the invention all parts of the measurement tube of the vortex flow meter which come in contact with the substance to be measured are coated with a less noble material, which is resistant to the respectively relevant substance to be measured, the basic material not having this resistance.

Abstract: The invention relates to an electrode for a flow measuring device according to the preamble of patent claim 1. In order to obtain an electrode which is easy to assemble, according to the invention the electrode consists of at least two elements which are connected together via a threaded bush or a nut, and the two parts are kept apart by mechanical spring tension via two spring elements lying between them.

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: A magnetic-inductive flow meter with a measuring tube, which can be fitted into a pipeline system by using flange portions at the ends, with at least two measuring electrodes that are fitted into the wall of the measuring tube opposite each other in an electrically isolated manner and are intended for sensing a measuring voltage, a magnet unit, which is likewise arranged on the outside of the measuring tube, generating a magnetic field that is aligned substantially perpendicularly in relation to the direction of flow of the conductive flow medium to be measured, and the measuring tube being provided on the inside with means for the electric isolation of the measuring electrodes from the measuring tube, the means for the electric isolation taking the form of a thin inner coating of the measuring tube, the layer thickness of which lies in the range of 0.1-500 ?m.

Abstract: A magnetoinductive flowmeter for a medium (2), which is flowing through a measuring tube (1) and has a minimum electrical conductivity, having at least two electric coils (3a, 3b), which are arranged opposite one another on the measuring tube (1), for the purpose of inducing a magnetic field running essentially perpendicularly with respect to the longitudinal axis of the measuring tube (1), and having an electrode arrangement (4), which is likewise aligned essentially perpendicularly with respect to the longitudinal axis of the measuring tube (1) and essentially perpendicularly with respect to the magnetic-field axis, for the purpose of measuring a measurement voltage induced as a result of the flow of medium (2), the electric coils (3a, 3b) being accommodated such that they are sealed on the outside in each case one associated housing part (4a and 4b, respectively), which housing parts are in the form of hollow-cylinder segments and are mounted detachably on the measuring tube (1) by being joined together so

Abstract: A method and device for obtaining an interference free measurement from a flowmeter. The flowmeter includes a measuring tube through which a flowable medium flows through a magnetic field generated by a magnetic arrangement and at least two measuring electrodes for detecting the measurement voltage induced by the flowable medium. The medium gives rise to interference voltages. The electrodes are connected to an interference-voltage eliminating unit by which common-mode interference is first eliminated by differentiation and unequal interference voltages are subsequently eliminated.

Abstract: The invention relates to a method and a device for determining the density and speed of a free-flowing medium according to the preamble of patent claims 1 and 4. In order to obtain a larger variety of evaluation possibilities, the flow speed and/or the density p are derived from the cited sensory variables, according to the field equation F=G×B+p×E.

Abstract: A floating body flowmeter having a measuring tube (1) which is positioned vertically and through which a substance (2) to be measured flows, in which tube a floating body (3) is arranged in order to determine the flow rate, the rise height (h) of said body relative to the measuring tube (1) being in a defined relationship with the flow rate, it being possible for the measuring range to be adjusted at least via the density of the floating body (3), and the floating body (3) being heterogeneous in such a way that the latter consists of an industrial mass-produced material in the core (4), the material selection being coordinated with the fact that the measuring range can be adjusted substantially via the density of the core (4), and the core (4) is provided with an external coating (5), its material being coordinated with the fact that this is chemically and/or mechanically resistant to the substance to be measured, and furthermore that all the other parts in contact with the substance to be measured are coated

Abstract: A magnetic induction flowmeter has a plastic measuring tube (1), which can be inserted into a pipeline system, having at least two mutually opposite measuring electrodes (3) introduced into the wall of the measuring tube (1) in order to register a measuring voltage, a magnetic unit (2), 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. The plastic measuring tube (1) is equipped with means for diverting axial and thrust forces which act from the outside on the measuring tube (1) inserted into the pipeline system, in order to keep destructive mechanical loadings away from the measuring tube (1).

Abstract: The invention relates to an electrode which is in contact with a substance to be measured, especially for detecting the measuring values in a magnetic induction flowmeter (IDM), said electrode coming into contact with an abrasive or chemically aggressive substance to be measured (9). The inventive electrode comprises a form-determining base body (8) consisting of a metal that is non-resistant in relation to the substance to be measured (9), the surface of said base body being at least partially provided with a precious metal coating (11) for improving the electroconductivity. Said coating establishes the electrical contact with an envelope body (10) which is resistant in relation to the substance to be measured (9), surrounds the base body (8), and establishes the contact with the substance to be measured (9).

Abstract: A magnetic-inductive flow meter with a measuring tube (1) made of metal, which is flowed through by a medium (4) which has a minimum electrical conductivity and is permeated by a magnetic field generated by means of an arrangement of magnets (5), in the region of which field at least two measuring electrodes (6) arranged diametrically on the measuring tube (1) are provided for sensing the inductively generated measuring voltage, the metal measuring tube (1) being provided with an electrically insulating inner layer (7) and an electrically conductive grounding disk (8) being arranged at the end face for grounding the medium flowing through the measuring tube (1), which disk is connected to ground via the measuring tube, the grounding disk (8?) consisting of an electrically conductive plastic which comes to lie in sealing contact directly against the end face (2) of the measuring tube (1) in order to be connected to ground by the direct contact.

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 magnetoinductive flowmeter having a measurement tube (1), through which a flowable medium (3) flows, with a magnet unit (4a, 4b) which is arranged on the outside of the measurement tube (1) and produces a magnetic field which is oriented substantially perpendicular to the direction of flow of the flowable medium (3), with at least two measurement electrodes (5a, 5b) which are inserted opposite one another in the wall of the measurement tube (1) such that they are electrically insulated being provided for detecting the measurement voltage which is induced through the flowable medium (3) in the magnetic field and each coming into contact with the flowable medium (3) by means of at least one end face (9), so that the measurement electrodes (5a, 5b) operate in the manner of galvanic electrodes, wherein each measurement electrode (5) is designed in a divided manner and comprises a head section (8) which is composed of a noble, low-corrosion material and also a shaft section (7) which is composed of a base, elect

Abstract: A method and device for detecting physical-chemical states on measuring electrodes (4a, 4b) of a flowmeter, through the measuring tube (1) of which a flowable medium (2) flows which, in doing so, passes through a magnetic field generated by a magnetic arrangement (3), wherein, for detecting the measurement voltage induced by the flowable medium (2), at least two measuring electrodes (4a, 4b), which are connected to a following interference-voltage eliminating unit (6) by which common-mode interference is first eliminated by differentiation, are arranged at the measuring tube (1), wherein unequal interference voltages are subsequently eliminated by the interference-voltage eliminating unit (6) in that, in operation, the current voltage value U+(n) and U?(n) of each individual measuring electrode (4a; 4b) is compared with the associated preceding voltage value U+(n?1) and U?(n?1), a measurement being released for further signal processing only when as a result of the comparison, an equal, essentially proportion

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: A magnetoinductive flowmeter for a medium (2), which is flowing through a measuring tube (1) and has a minimum electrical conductivity, having at least two electric coils (3a, 3b), which are arranged opposite one another on the measuring tube (1), for the purpose of inducing a magnetic field running essentially perpendicularly with respect to the longitudinal axis of the measuring tube (1), and having an electrode arrangement (4), which is likewise aligned essentially perpendicularly with respect to the longitudinal axis of the measuring tube (1) and essentially perpendicularly with respect to the magnetic-field axis, for the purpose of measuring a measurement voltage induced as a result of the flow of medium (2), the electric coils (3a, 3b) being accommodated such that they are sealed on the outside in in each case one associated housing part (4a and 4b, respectively), which housing parts are in the form of hollow-cylinder segments and are mounted detachably on the measuring tube (1) by being joined together

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: 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).

Abstract: The present invention relates to a magnetic-inductive flow meter with a measuring tube, which can be fitted into a pipeline system by using connecting means, with at least two measuring electrodes that are fitted into the wall of the measuring tube opposite each other in an electrically isolated manner and are intended for sensing a measuring voltage, a magnet unit, which is likewise arranged on the outside of the measuring tube, generating a magnetic field that is aligned substantially perpendicularly in relation to the direction of flow of the conductive flow medium to be measured. In order to provide here a magnetic-inductive flow meter for low-pressure applications which can be easily produced and can also be easily fitted into a pipeline system, it is proposed here according to the invention that the the measuring tube (1) is produced from a semifinished tube made of high-density polyethylene (HDPE), which can be fitted into the pipeline system (2) without any flanges.

Abstract: A magnetic-inductive flow meter with a measuring tube, which can be fitted into a pipeline system by using flange portions at the ends, with at least two measuring electrodes that are fitted into the wall of the measuring tube opposite each other in an electrically isolated manner and are intended for sensing a measuring voltage, a magnet unit, which is likewise arranged on the outside of the measuring tube, generating a magnetic field that is aligned substantially perpendicularly in relation to the direction of flow of the conductive flow medium to be measured, and the measuring tube being provided on the inside with means for the electric isolation of the measuring electrodes from the measuring tube, the means for the electric isolation taking the form of a thin inner coating of the measuring tube, the layer thickness of which lies in the range of 0.1-500 ?m.