An electromagnetic flow meter includes a flowtube including a coil disposed in the vicinity of a measurement tube, and electrodes disposed on the measurement tube, a converter including an excitation unit configured to generate an excitation signal and output the excitation signal to the coil through an excitation cable, and a detection signal receiving unit configured to receive a detection signal from the electrodes through a signal cable, and generate a flow rate signal, and a miswiring detection unit configured to perform miswiring diagnosis on the excitation cable or the signal cable on the basis of a difference between a change amount of the flow rate signal when the excitation signal is being output and a change amount of the flow rate signal when the excitation signal is not being output.

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.

An electromagnetic flowmeter for measuring a flow of liquid in a liquid-carrying line has a magnet for producing a magnetic field in the liquid-carrying line, and an electrode pair for discharging an electrical voltage when the liquid flows through the liquid-carrying line. The flowmeter enables the flow of liquid to be determined on the basis of the measured voltage. The magnet can rotate about an axis in order to produce an alternating magnetic field.

Methods, apparatuses, and embodiments related to estimating void fractions in real-time or substantially real-time without disrupting a production flow of, e.g., a geothermal power plant. Some embodiments describe methods and systems of determining void fraction of a two-phase mixture extracted from a geothermal well by measuring the attenuations of one or more radiofrequency signals in a fixed span of a transportation unit (e.g., a pipe). Depending on void fraction of the two-phase mixture in the transportation, the RF signals would attenuate differently across the fixed span. For example, a monitor system can utilize one or more transmitter antennas in the transportation unit to transmit one or more RF signals and utilize one or more receiver antennas to measure attenuations of these RF signals over the fixed span. In some embodiments, an antenna can be configured to serve as both a transmitter antenna and a receiver antenna.

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.

A flowmeter includes an exciter configured to excite fluid which is a measurement target, a state detector configured to detect a state of the fluid excited by the exciter, a driver configured to supply exciting current for driving the exciter, a first current detector that is disposed between the exciter and the driver, the first current detector being configured to detect the exciting current, and a processor configured to diagnose insulation deterioration of the exciter in accordance with a change of a detection result of the first current detector.

An apparatus for measuring flow of a fluid flowing using the magneto-inductive measuring principle, comprising a measuring tube having at least two subsections, wherein the subsections differ in diameter and/or geometry of cross sectional area; at least one magnet system having at least two coils for producing a magnetic field directed essentially perpendicularly to the flow direction of the fluid; at least two measuring electrode pairs for sensing induced voltage, wherein at least one measuring electrode pair is arranged in a first subsection and a second measuring electrode pair in a second subsection, wherein each measuring electrode pair includes first and second measuring electrodes, which lie opposite one another in the measuring tube and the respective connecting lines of the measuring electrodes are perpendicular to the tube axis and perpendicular to the magnetic field, and an electronics unit for signal registration and/or evaluation and for power supply of the coils, wherein the electronics unit is so embodied that it determines from the induced voltage the flow velocity of the fluid and/or the flow rate of the fluid for at least one subsection.

According to one embodiment, an electromagnetic flowmeter includes a measurement pipe, a first coil, a second coil, core members, and an electrode. An object to be measured flows through the measurement pipe. The first coil is provided radially outside the measurement pipe, the first coil generates a magnetic field in the measurement pipe. The second coil is provided radially outside the measurement pipe and forms a pair with the first coil, the second coil generates the magnetic field in the measurement pipe. The core members are provided in an inner circumference of the first coil and an inner circumference of the second coil in a radial direction of the measurement pipe. The electrode is provided in the measurement pipe, the electrode detects induced electromotive force generated from a flow of the object to be measured through the measurement pipe. The inner circumference of the first coil, the inner circumference of the second coil, and an outer diameter of the core member have shapes such that the core members can be provided in the inner circumference of the first coil and the inner circumference of the second coil.

A field device of measuring- and automation technology, which field device meets requirements for operation in explosion-endangered environments. Safe operation of the field device in explosion-endangered environments is assured by a pluggable connector coupling for electrical coupling of different field device components. An essential feature of the pluggable connector coupling is a sealing element for spatial and gas-tight sealing of a contact region of contacting elements of the pluggable connector coupling from a free volume remaining in the pluggable connector coupling.