Abstract: A monitoring device may include a housing, which may include a distal end, a proximal end, and a fluid pathway extending through the proximal end and distal end. The distal end may include a connector configured to couple to a catheter assembly. The monitoring device may include one or more sensors disposed within the fluid pathway. The sensors may facilitate identification of an occlusion within the catheter assembly.

Abstract: Surface elements, such as protrusions, are provided for use on the surface of flow-following apparatuses, such as surface drifters or subsurface drogues, to enhance the hydrodynamic properties of the apparatus and enhance their capabilities to follow fluid motion. The protrusions may comprise helical strakes or splitter plates for optimizing the drag-to-inertia ratio of the flow-following apparatus, with the goal to enhance their flow-following capabilities. In some embodiments, the flow-following apparatus has a generally axisymmetric body shape, such as having a cylindrical, spherical or oblong shape. The flow-following apparatus may further comprise a position tracking device to track flow motion such as ocean currents.

Abstract: A fluid measurement device and methods of manufacturing and using the same are disclosed. The fluid measurement device includes a conduit configured to transport a fluid, a conductivity sensor in the conduit, and a voltage sensor in the conduit and having first and second rings, probes, or plates. The conductivity sensor is configured to determine the conductivity of the fluid. The voltage sensor is configured to receive a first voltage on the first ring, probe, or plate and detect a capacitance or a second voltage on the second ring, probe, or plate. A value of the capacitance or second voltage corresponds to the amount of fluid in the voltage sensor. The total amount of fluid through the conduit may be determined from amount of fluid in the voltage sensor, the fluid flow rate, the fluid velocity, and the number of samples or the sampling rate.

Abstract: A measurement system for positioning accuracy of a robotic arm includes the robotic arm, a computing device, a robotic arm controlling device, a first magnetic element and a second magnetic element. The robotic arm controlling device is electrically connected to the robotic arm and the computing device. The first magnetic element is disposed on a robotic arm. The second magnetic element is disposed on a fixed platform. One of the first magnetic element and the second magnetic element is electrically connected to the computing device. The robotic arm controlling device controls the robotic arm to move the first magnetic element above the second magnetic element to generate a magnetic field. The computing device is configured to calculate a plurality of movement error information of the first magnetic element in the magnetic field, and count the plurality of movement error information to obtain a positioning accuracy of the robot arm.

Abstract: An electromagnetic flow sensor for an electromagnetic flow meter (201) is disclosed. The sensor comprises a body (204) or frame, a flow passage (252) through the body or frame, a part of a magnetic circuit (248, 295) supported by the body or frame for applying a magnetic field across the flow passage, and at least first and second electrodes (298) supported by the body or frame, the at least first and second electrodes arranged to sense a voltage in response to a conductive fluid flowing through the flow passage. At least a portion of the body supporting the magnetic circuit part and the at least first and second electrodes is configured to be insertable into a flow tube (206) through a single aperture in the flow tube.

Abstract: A measurement apparatus comprising: a plurality of first electrodes, each of the first electrodes being spaced apart by at least a first predetermined spacing; a plurality of second electrodes, each of the second electrodes being spaced apart by at least a second predetermined spacing less than the first predetermined spacing; an energisation source arranged to energise at least one of said first electrodes so as to cause an electric field to be established between at least one pair of said first electrodes, and to energise at least one of said second electrodes so as to cause an electric field to be established between at least one pair of said second electrodes; a monitor arranged to monitor an electrical parameter at at least one of said first electrodes in response to said energisation of at least one of said first electrodes and to monitor an electrical parameter at at least one of said second electrodes in response to said energisation of at least one of said second electrodes; and a controller arranged

Abstract: A laundry treating apparatus may include a washing agent supply unit supplying a liquid washing agent into a tub through a washing agent supply passage between a storage container and the tub, a residual quantity detecting unit to detect a residual quantity of the liquid washing agent, a laundry quantity detecting unit to detect a laundry quantity, and a controller controlling the washing agent supply unit to supply the liquid washing agent by adding a quantity of the liquid washing agent corresponding to the laundry quantity with a quantity of the liquid washing agent corresponding to the washing agent supply passage, when the liquid washing agent is initially supplied after detecting a residual quantity shortage of the washing agent, whereby an accurate quantity of the liquid washing agent can be supplied upon an initial supply after the detection of the residual quantity shortage.

Abstract: The disclosure relates to a flow rate sensor for determining a flow rate of a liquid within a tube, the flow rate sensor comprising at least one coil arranged in the vicinity of the tube in such a manner that an eddy current in the liquid due to the liquid's flowing affects an impedance of the coil.

Abstract: An electromagnetic speedometer for a boat having hull containing an opening includes an electromagnetic coil supported by the hull for establishing an electromagnetic field in the water adjacent the hull opening. A plurality of electrodes are supported by an arrangement that both closes the hull opening and supports the electrodes in engagement with the water adjacent the hull opening. The electrodes are connected by conductors with a velocity measuring circuit arranged above the hull interior surface. Preferably, the electrode support arrangement includes guide tubes supporting the electrodes for removal relative to the boat hull, thereby to permit cleaning of the electrodes. The guide tubes are closed by valves when the electrodes are removed from the assembly. In one embodiment, the electromagnetic coil is of the end-fired type, and in another embodiment, the electromagnetic coil is annular and is arranged above and below the hull.

Abstract: An inline analyzer for a milking machine system includes an outer body having a central axis, a fluid input channel, an upper cover attached to the fluid input channel, a central portion attached to the upper cover, a lower portion attached to the central portion, and a fluid output channel attached to the lower portion, wherein the fluid input channel, the central portion and the fluid output channel each have a hollow central channel. A float portion is disposed loosely within the outer body and is free to move axially along the central axis such that milk flows around the float portion. Electrode(s) extend through an upper portion of the float portion. A battery, processor(s), memory and actuator are disposed within float portion. The actuator causes the float portion to move axially along the outer body central to regulate the flow of milk through the outer body.

Abstract: An electromagnet, particularly a brake coil, especially for an electromagnetically actuatable brake, an electromagnetically actuatable brake and a brake motor, the electromagnet having a coil winding accommodated in a coil brace, the coil brace being accommodated in a magnet body, the magnet body being two-part or multipart, an internal pole being produced from a first material and the external pole being produced from a second material, the first material exhibiting a higher specific magnetic permeability than the second material.

Abstract: An electromagnetic flow meter comprises: an excitation member (5) in which a plurality of magnets (5a, 5b, 5c) are arranged spaced apart from one another along an outer circumferential surface of a flow channel (1) through which liquid metal flows, and in which a magnetic field is formed in a direction perpendicular to the outer circumferential surface of the flow channel (1); and electrodes (6a, 6b) provided between the magnets (5a, 5b, 5c) of the excitation member (5), for measuring the voltage generated when the liquid metal crosses the magnetic field. A pulse excitation electric-current supply device (7a) for supplying a pulsed excitation current to the excitation member (5) is provided, whereby a flow speed distribution can be suppressed from being generated in the circumferential direction of the channel (1) even when the flow speed of the liquid metal is low, and the flow rate can be accurately measured.

Abstract: A plug-and-play sensor peripheral component includes an electrically conductive physical connector; an electrical connector; a transformer; and an RF communication and data storage circuit. The electrical connector is electrically connected to the physical connector by a first conductive path. The transformer is electrically connected to the RF communication and data storage circuit. The transformer and the RF communication and data storage circuit are electrically isolated from the physical connector and the electrical connector. Electrically connecting the physical connector to the electrical connector by other than the first conductive path inductively couples the RF communication and data storage circuit to the first conductive path.

Abstract: A system and method for measuring volumes and areas using electromagnetic induction techniques. A current is generated and fed into one of two coil assemblies to induce voltage into another coil assembly to provide accurate values for volume or area.

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 method for predictive maintenance for a magneto-inductive flow-measuring device and/or to a method for determining electrical conductivity of a medium flowing through a magneto-inductive flow-measuring device, wherein the magneto-inductive flow-measuring device includes a magnet system, which produces a magnetic field passing through the measuring tube essentially transversely to a measuring tube axis; at least two measuring electrodes coupled with the medium, having a defined rest potential and being arranged in a region of the measuring tube lying essentially perpendicularly to the magnetic field; and a control/evaluation unit, which delivers information concerning volume- or mass-flow of the medium on the basis of measurement voltage induced in the measuring electrodes.

Abstract: A sensor assembly for a fluid flowmeter including a body having a hollow interior where the body is configured to have a moisture impermeable barrier that prevents moisture from entering the interior at extreme fluid pressures. The assembly includes at least one electrode that is mounted on the body and a coil assembly configured to be removably inserted in the hollow interior of the body, where the coil assembly includes at least one magnetic coil electrically isolated from the at least one electrode when the coil assembly is inserted into the hollow interior of the body.

Abstract: The present invention is an assembly of a removable and preferably disposable electromagnetic flow chamber cassette adapted to be connected with a receiver having a coil and C-shaped core. An orientation slot in the C-shaped core and a supported insertion slot for electrical connection of the cassette cause an electrode bearing flow chamber to exposed to a magnetic field. Voltages across two or more pairs of electrodes are detected by microprocessor means for calculation and display of a flow rate of a flowing liquid in the flow chamber.

Abstract: A fine channel flowmeter A1 is provided for measuring the amount of a blood sample DS through a channel 10. The flowmeter includes at least two electrode groups 62Aa, 62Ab each including a pair of electrodes 62a, 62b, and a conduction detector 7 for detecting electrical conduction between the paired electrodes 62a, 62b included in each of the electrode groups 62Aa, 62Ab. Each of the electrodes 62a, 62b is exposed in the channel 10 at least partially, and the electrode groups 62Aa, 62Ab are spaced from each other in the flow direction of the channel 10.

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: Methods and apparatuses for detecting radial flows of conductive fluid are provided. In an embodiment of the present invention, shields are used to prevent or reduce circulating electrical currents from causing a voltage difference that would adversely affect the measured voltage difference between two adjacent electrodes. The shields may be a conduit through which conductive fluid may flow. Groups of sensors, e.g., two or more, may be placed within the shield. The shields may have any cross-section shape. Generally, once the circulating electrical current flow between the electrode pairs is substantially reduced or eliminated, only the voltage difference from the localized induced electric field remains. This way, a true induced voltage may be measured, and thus an accurate value for the fluid velocity may be determined.

Abstract: An industrial process sensor having a sensor component exposed to process fluid detects when the sensor performance has been degraded by a sensor coating buildup from the process fluid. A baseline statistical metric, such as standard deviation of the process parameter sensed by the sensor, is determined during an initial operating period when the sensor component is clean. During continued operation of the sensor, the statistical metric is continually updated and monitored. An alarm output indicating that sensor coating has degraded sensor performance is produced when the current value of the statistical metric varies from the baseline value by an amount indicating degraded sensor performance.

Abstract: The flow responsive voltages detected at the electrodes of magnetic flow meters are typically reduced in magnitude by an electrical impedance shunting effect of the fluid on the electrodes. This problem is resolved by providing buffering electrodes located near, and preferably both upstream and downstream, of flow responsive sensing electrodes. The buffering electrodes are driven by amplifiers having signals detected by the flow responsive electrodes as an input. Thus, fluid in the vicinity of the flow responsive electrodes is forced to acquire an offset voltage which can reduce the shunting effect to a negligible level.

Abstract: Problems of instability and non-linearity in probe-type magnetic flow meters are ameliorated by either or both of a conductor coating connecting a tip portion of the probe with a supporting probe stem and either a shrouding arrangement or skewed end plates parallel to the flow direction that are arranged adjacent to the sensing electrodes and that act to straighten and confine fluid flowing past the electrodes.

Abstract: A fine channel flowmeter A1 is provided for measuring the amount of a blood sample DS through a channel 10. The flowmeter includes at least two electrode groups 62Aa, 62Ab each including a pair of electrodes 62a, 62b, and a conduction detector 7 for detecting electrical conduction between the paired electrodes 62a, 62b included in each of the electrode groups 62Aa, 62Ab. Each of the electrodes 62a, 62b is exposed in the channel 10 at least partially, and the electrode groups 62Aa, 62Ab are spaced from each other in the flow direction of the channel 10.

Abstract: Problems of instability and non-linearity in probe-type magnetic flow meters are ameliorated by either or both of a conductor coating connecting a tip portion of the probe with a supporting probe stem and flat end plates parallel to the flow direction that are arranged adjacent to the sensing electrodes and that act to straighten and confine fluid flowing past the electrodes.

Abstract: An electro-magnetic flow sensor, which is arranged for measuring a flow rate of liquid, includes a micro controller and a liquid flowing apparatus communicatively linking to the micro controller. The liquid flowing apparatus includes a flow chamber housing having a flow chamber for receiving the liquid therein, a magnetic source communicating with the flow chamber housing for generating a magnetic field within the flow chamber so as to allow the liquid exposing in the magnetic field, and an array of electrodes alignedly integrated with the flow chamber housing for measuring a voltage magnitude of flow generated in the flow chamber when the liquid flows within the flow chamber under the magnetic field, wherein the micro controller reads the voltage magnitude and converts the voltage magnitude into the flow data of the liquid.

Abstract: A system and method for measuring volumes and areas using electromagnetic induction techniques. A current is generated and fed into one of two coil assemblies to induce voltage into another coil assembly to provide accurate values for volume or area.

Abstract: A device for measuring a flow of a fluid is provided. The device includes a base, a channel, and at least two electronic circuits. The channel is mounted on the base, flowing the fluid therein and having at least two sections, and the at least two electronic circuits are electrically connected to the respective at least two sections, detecting a respective variation signal corresponding to the respective at least two sections so as to obtain the flow according to the respective variation signal.

Abstract: An electro-magnetic flow sensor, which is arranged for measuring a flow rate of liquid, includes a micro controller and a liquid flowing apparatus communicatively linking to the micro controller. The liquid flowing apparatus includes a flow chamber housing having a flow chamber for receiving the liquid therein, a magnetic source communicating with the flow chamber housing for generating a magnetic field within the flow chamber so as to allow the liquid exposing in the magnetic field, and an array of electrodes alignedly integrated with the flow chamber housing for measuring a voltage magnitude of flow generated in the flow chamber when the liquid flows within the flow chamber under the magnetic field, wherein the micro controller reads the voltage magnitude and converts the voltage magnitude into the flow data of the liquid.

Abstract: An electromagnetic flowmeter for measuring a flow rate of a fluid in a pipe is described. A pipe carries a fluid. A magnetic coil is disposed adjacent to the pipe for inducing a magnetic flux in the fluid. A plurality of electrodes are disposed within the pipe, and the plurality of electrodes are electrically isolated from one another. Measurement circuitry is coupled to at least one of the plurality of electrodes and is configured to measure flow rate as a function of a potential across the plurality of electrodes. An empty pipe detector is coupled to at least one of the plurality of electrodes and is adapted to detect an empty pipe condition based upon an adjustable test criteria. In one embodiment, a local operator interface is coupled to the empty pipe detector for adjusting the adjustable test criteria.

Abstract: The process measuring device includes a flow sensor having a measuring tube, a sensor arrangement for producing a measurement signal, and an evaluation and operating circuit. The method serves to compensate for the effects of interfering potentials which are caused especially by foreign particles or air bubbles in the liquid to be measured. For this purpose, an anomaly in the waveform of the measurement signal caused at least in part by an electrical, especially pulse-shaped, interfering potential is detected by determining within a stored first data set a data group which digitally represents the anomaly. To generate an interference-free data set, the data belonging to the data group are removed from the stored first data set.

Abstract: A sensing element (2) for sensing a fluid (50) composition and a method of using the sensing element (2) are provided. The sensing element (2) includes an electrode base (36) having a first electrode (4) and a second electrode (6) disposed on the electrode base (36); the first electrode (4) and a second electrode (6) being electrically isolated one another except through an external circuitry (64); the first electrode (4) and the second electrode (6) defining a gap (42) between one another such that electrical conduction through a fluid (50) within the gap (42) is proportional to the composition of the fluid.

Abstract: A milk flow device which includes a conduit for transporting a substantially continuous milk flow varying in height up to a maximum height wherein the maximum height is less than a fluid height which would occlude the conduit and interrupt the vacuum level is shown. A first sensor determines the height of a selected section of the substantially continuous milk flow. The first sensor has a predetermined cross-sectional area and defines an opening for passing a milk flow therethrough. The first sensor is located at a predetermined location in the conduit. A second sensor having a cross-sectional area substantially equal to the cross sectional area of the first sensor is spaced within the conduit in a selected direction and a known distance from the first sensor. The second sensor determines that the selected section of the continuous milk flow has traversed the known distance. A conductivity sensor measures the conductivity of the milk.

Abstract: In a borehole logging tool, the flow of conductive fluid into or out of a wellbore at the wellbore wall is detected and measured with a sensor loop proximate the borehole inner wall. The sensor loop includes a series of contiguous sensors that act as electromagnetic flowmeters and provide fluid measurements covering the entire circumference of the sensor loop. The sensor loop includes an elastic element that forces the sensor loop outward to maintain pressure along the sensor loop circumference against the interior borehole wall. The sensor loop is designed to lie at a non-perpendicular angle to the wellbore axis, and mechanical arms press the top and bottom of the loop against the borehole inner wall.

Abstract: The Annular Void Electromagnetic Flowmeter [AVEF] is a flowmeter in which fluid flow rate of compressible or incompressible fluid is determined by measuring a fluid-mechanical-electrical response that is dependent upon an electromagnetic field. The construction of the flowmeter may be such that it does not reduce the flowing area of an open or closed fluid conduit. The measured electronic response may be generated by a fluid that is in an explosive, fast-transient, or steady-state flow condition, and which fluid may have a laminar, turbulent, or combined flowing property. High resolution of flow rate is achieved by a range of magnitude of the measured voltage with respect to a reference voltage of up to fifty percent. The AVEF is characterized by an annular void for obstructionless flow and by perturbations of an impressed electromagnetic field in which the field is altered as a result of an expanding fluid. The electromagnetic field is generated by an axial or a longitudinal coil.

Abstract: A milk flow device which includes a conduit for transporting a substantially continuous milk flow varying in height up to a maximum height wherein the maximum height is less than a fluid height which would occlude the conduit and interrupt the vacuum level. A first sensor determines the height of a selected section of the substantially continuous milk flow. The first sensor has a predetermined cross-sectional area and defines an opening for passing a milk flow therethrough. The first sensor is located at a predetermined location in the conduit. A second sensor having a cross-sectional area substantially equal to the cross sectional area of the first sensor is spaced within the conduit in a selected direction and a known distance from the first sensor. The second sensor determines that the selected section of the continuous milk flow has traversed the known distance. A conductivity sensor measures the conductivity of the milk.

Abstract: A magnetic flow meter includes a cylindrical vessel within which electrodes are placed directly opposite each other about a magnetically permeable core. In that way, two flow channels are obtained in the vessel. A common magnetic field is applied across both flow channels. The magnetic flow meter is used in conjunction with a controller which monitors amplitude modulated signals representative of applied magnetic field and induced electric field. These amplitude modulated signals are passed to Sigma-Delta modulators, which directly digitise the amplitude modulated AC signals into digital pulses. The controller is capable of monitoring reverse flow through the meter, and to store results until forward flow resumes. Moreover, the controller generates a driving signal for coils which generates a magnetic field, the coil being placed in conjunction with a capacitor which causes resonance. This reduces power consumption by the coil in driving the meter.

Abstract: The invention relates to an apparatus for measuring the flow of a medium (11) to be measured which flows through a measuring tube (2) in the direction of the measuring tube axis (3), having a magnetic arrangement which generates a magnetic field which permeates the measuring tube (2) and runs essentially transversely with respect to the measuring tube axis (3), having at least one measuring electrode (4; 5) which is arranged in a lateral region of the measuring tube (2) and is coupled electrically or capacitively to the medium (11) to be measured, and having an evaluation/control unit (8) which, using the measurement voltage induced in the measuring electrode (4; 5), yields information about the volumetric flow of the medium (11) to be measured in the measuring tube (2).

Abstract: A flow tube has a metal outer tube and is lined with an ETFE fluoropolymer that is resistant to corrosive chemicals and mechanical damage even at high temperatures. The inner surface of the metal tube is coated with a bonding metal that can be securely bonded to the outer metal tube and also forms a strong bond with ETFE fluoropolymer. After the bonding metal has been applied, a layer of a desired thickness of the ETFE fluoropolymer is molded in place to form an inner liner for the flow tube.

Abstract: A flow sensing head for a magnetic flow sensor may be configured as an insertion probe having one or more flow passageways oriented perpendicular to the magnetic axis of an electromagnet. When a conductive liquid flows through the passageway a voltage is induced between two electrodes spaced out along a line perpendicular to the passageway and to the axis of the electromagnet. A portion of the lead wires from the electrodes is fed through an axial throughhole in a conductive core of the electromagnet in order to electrostatically shield the wires from extraneous voltage sources. A preferred flow sensing head has two flow passageways, each with its own pair of electrodes. Signals from the two pairs of electrodes may be combined in a series-aiding arrangement, or in a parallel arrangement, or the signals from the two pairs of electrodes may be processed independently of each other.

Abstract: A vortex flow meter includes a measuring tube in which a fluid is carried, a vortex generator provided in the measuring tube for developing a Karman vortex in the fluid, a magnetic field generator generating a magnetic field across the measuring tube downstream of the vortex generator, a pair of electromotive force measuring electrodes provided downstream of the vortex generator for measuring an electromotive force generated by the Karman vortex passing across the magnetic field, a pair of reference electrodes provided at locations upstream and downstream of the electromotive force measuring electrodes, respectively, for measuring a potential at each location, and a detector circuit electrically connected to the electromotive force measuring electrodes and the reference electrodes for calculating the flow of the fluid from the electromotive force and the potential measured by the reference electrodes.

Abstract: An electromagnetic flow control valve for an electrically conductive liquid having a plurality of coils and yokes surrounding a non-metallic, such as alumina, tube through which an electrically conducting liquid, such as liquid metal, flows. Direct current applied to the coils causes retarding forces to be imposed on the flowing liquid. The electromagnetic flow control valve can be used in conjunction with a continuous caster where the electromagnetic flow control valve is in fluid communication with a tundish. Built-in galvanomagnetic probes measure changes in the applied magnetic field to determine the rate of flow of liquid metal through the device.