A system may include a driver circuit configured to receive a clock signal. The system may also include a first tuned circuit and a second tuned circuit. The first tuned circuit and the driver circuit may be collectively tuned according to a first frequency range. The first tuned circuit may be configured to be active when a rate of the clock signal is within the first frequency range and to be inactive when the rate is outside of the first frequency range. Further, the second tuned circuit and the driver circuit may be collectively tuned according to a second frequency range that is different from the first frequency range. The second tuned circuit may be configured to be active when the rate is within the second frequency range and to be inactive when the rate is outside of the second frequency range.

A detection device for a liquid-conducting appliance includes a hydraulic body (2) defining a duct (3) for a flow of a liquid, and a flow sensor on the hydraulic body (2), which includes an electromagnetic arrangement and a detection arrangement. The detection arrangement includes two electrode units (20) for detecting a potential difference induced by the flow of the liquid through an electromagnetic field generated by the electromagnetic arrangement. The hydraulic body (2) has two through openings on two opposite sides (3a, 3b) of the duct (3), inserted in each of which is a corresponding electrode unit (20), in such a way that the electrode units (20) are opposed to one another and in contact with the liquid. The device (1) includes sealing elements at each through opening, for preventing leakage of the liquid from the duct (3).

A magneto-inductive flow measuring device (1) comprising a measuring tube (2) on which a magnet system and two or more measuring electrodes (3) are arranged and/or secured, wherein the measuring tube (2) has in- and outlet regions (11, 12) with a first cross section and wherein the measuring tube (2) has between the in- and outlet regions (11, 12) a middle segment (10), which has a second cross section, wherein the measuring electrodes (3) are arranged in the middle segment (10) of the measuring tube (2), wherein the middle segment (10) at least in the region of the measuring electrodes (3) is surrounded by a tube holder (15), which guards against cross-sectional deformation of the second cross section.

A method for defect detection for a signal line between an electrode and a measuring- and/or evaluation unit of a magneto-inductive flow measuring device having at least one measuring- and/or evaluation unit, as well as a measuring tube with at least two measuring electrodes and a third electrode, comprising steps as follows: A) ascertaining a ratio of at least two measured electrical impedances between the measuring electrodes and/or between at least one of the two measuring electrodes and the third electrode; B) comparing the impedance ratio with a desired value range and C) outputting a defect report, when the impedance ratio exceeds or subceeds the desired value range, and a magneto-inductive flow measuring device.

A method of producing a magnetic-inductive flow meter with at least one measurement tube, a magnetic field generating apparatus for generating a magnetic field which runs at least also perpendicular to the longitudinal axis of the measurement tube, and two measurement electrodes, the measurement tube having a metallic base body provided with a thermoplastic cover layer, a virtual connecting line of the two measurement electrodes running perpendicular to the direction of the magnetic field which is permeating the measurement tube perpendicular to the longitudinal axis of the measurement tube. The penetration sites of the measurement tube at which the measurement electrodes penetrate the measurement tube are easily made liquid-tight by a liquid-tight connection which has been produced by heating of the cover layer at the penetration sites for sealing the thermoplastic cover layer of the measurement tube to the measurement electrodes.

A magnetically inductive flow measuring probe includes a housing; at least one measuring electrode for forming a galvanic contact with the medium and for tapping an induced voltage in the medium; a device for generating a magnetic field, wherein the device is arranged in the housing, wherein the device comprises a field guide assembly and a coil arrangement, wherein the field guide assembly functions as a sensor electrode for capacitively determining and/or monitoring a fill level of the medium in the tube line or the measuring tube. The present disclosure also relates to a method for determining a fill level of a medium in a measuring tube or in a tube line using the magnetically inductive flow measuring device.

A magnetic-inductive flow meter for measuring flow velocity or volume flow rate of a medium includes: a measuring tube having a first cross-section and a middle segment, which has a second cross-section, between inlet side and outlet side end planes, wherein the first cross-sectional area is greater than the second cross-sectional area; a pole shoe or a saddle coil, which subtends the measuring tube with a maximum central angle; and an electrode system having two electrode pairs, wherein a central angle in the second cross-section defines a minimum circular sector in which the electrodes located on a side of the measuring tube are distributed, wherein the electrode pairs are arranged in the middle segment such that the central angle and the maximum central angle are adapted relative to one another such that the flow meter is insensitive to departures from a rotationally symmetric flow.

A polymeric flow tube assembly is provided. The flow tube assembly includes a flow conduit configured to allow fluid flow therethrough. A first coil is mounted with respect to the flow conduit and disposed about a first magnetic pole member. A second coil is mounted with respect to the flow conduit and is disposed about a second magnetic pole member. The second magnetic pole member is configured to cooperate with the first magnetic pole member to generate an electromagnetic field across a flow measurement aperture. First and second electrodes are positioned within the flow tube assembly to measure an electromotive force generated within a fluid in the flow measurement aperture. At least one of the first magnetic pole member, second magnetic pole member, first electrode and second electrode is formed, at least in part, of a polymer.

A magnetic-inductive flowmeter with a measuring tube and at least one measuring electrode has at least one opening in its circumferential wall, at least a electrode head of the at least one measuring electrode being arranged in the at least one opening. At least one coil pair has first and second coils that are arranged offset to one another on the circumferential wall of the measuring tube in the axial direction of the measuring tube. The first and second coils are arranged at least partially overlapping to one another in a top view of a cross section through the measuring tube. The at least one measuring electrode is arranged in a peripheral area of the circumferential wall of the measuring tube that is located between the first and the second coil of the at last one coil pair.

A magnetic insertion meter is disclosed herein. Disclosed insertion meters include in some examples, a sensor head tube cylinder having a textured front surface and at least two electrodes. Disclosed insertion meters include a textured front surface adapted to move the separation point of a fluid flowing over the sensor head tube towards the upstream surface as compared to the same sensor head tube without the textured front surface. Methods of measuring flow are also disclosed herein using example magnetic insertion meters.