Abstract: Method for operating a resonant measurement system, especially a Coriolis mass flow meter, so as to be excitable in a linear operating range, the driving terminal current triggered by an electric excitation signal and the driving terminal voltage of the electromagnetic drive triggered by the electric excitation signal are measured. The driving power is determined from the driving terminal current and the driving terminal voltage, and if the driving terminal current exceeds a given maximum driving terminal current, and/or if the driving terminal voltage exceeds a given maximum driving terminal voltage and/or if the driving power exceeds a given maximum driving power, the electric excitation signal is limited to a threshold value such that the driving terminal current remains below the given maximum driving terminal current, and/or the driving terminal voltage remains below the given maximum driving terminal voltage, and/or the driving power remains below the maximum driving power.

Abstract: A method to determine a mass proportion of a first component of a multi-component fluid is provided that includes separating the first component in a separation step at least in part from the multi-component fluid, determining at least two reference flow rates, selected from a flow rate of the multi-component fluid supplied to the separation step, a flow rate of a residual fluid resulting from the separation of the first component, and a flow rate of a separation fluid accumulating in the separation step, and determining the mass proportion of the first component from the selected reference flow rates, taking into account a non-separated residual content of the first component in the residual fluid. An extraneous content of an additional separated component of the multi-component fluid is additionally taken into account.

Abstract: A coil system for a magneto inductive, flow measuring device, which comprises: a coil and core sheets led through the coil. The core sheets have equal shape and size, wherein each core sheet has a first and a second leg, which are connected together to form an L shape. At least a first core sheet and a second core sheet are so led through the coil that the first leg of the first core sheet and the first leg of the second core sheet extend parallel to one another and that the second leg of the first core sheet and the second leg of the second core sheet extend parallel to one another, wherein the second leg of the first core sheet and the second leg of the second core sheet are arranged at different ends of the coil.

Abstract: A device, method, and system are provided for monitoring the delivery of fluids through a drip chamber. The device includes an electromagnetic radiation (EMR) source and an EMR detector. A device body is employed to position the source and detector about the drip chamber so that the source and detector define an optical path across the drip chamber. A processor device is employed to detect fluid drops from differences between detector signal values separated by a lag time. The flow rate is determined from a drip factor and the detection of multiple drops. In the context of delivering intravenous (IV) fluids, a battery powered handheld monitoring device that includes the source, detector, device body, and processor device may be affixed to a drip chamber included in an infusion set. The device includes a user interface, including buttons, a display, and an audio speaker, for the input and output of information.

Abstract: A sensor assembly (200) for a vibrating meter (50) is provided. The sensor assembly (200) includes one or more conduits (103A, 103B). The sensor assembly (200) also includes one or more sensor components including one or more of a driver (104), a first pick-off sensor (105), and a second pick-off sensor (105?) coupled to the one or more conduits (103A, 103B). A flexible circuit (201) can be provided that includes a body (202) and one or more sensor component flexures (210-212?). The one or more sensor component flexures can extend from the body (202) and be coupled to a sensor component (104, 105, 105?) of the one or more sensor components.

Abstract: Certain embodiments herein relate to configurations for reducing the flow area for fluids traveling through a Vortex flowmeter. Such configurations may establish a minimum required Reynolds number consistent with optimized performance of the Vortex flowmeter. Various configurations for achieving optimized performance may include inserting one or more segments or a streamlined, torpedo-shaped body into a bore of a meter body of the Vortex flowmeter to block a certain cross-sectional area of the bore. By reducing the cross-sectional area of the bore, the Reynolds number of fluids may be increased to the optimized level. Another configuration may include reducing the diameter of the bore of the meter body. Any of these configurations may be implemented to achieve a desired Reynolds number, and hence, optimized performance. Certain embodiments herein also relate to determining or calculating precise or near precise sizes for segment insertions, torpedo body diameters, and diameters of the meter body.

Abstract: A flow sensor includes a fluid chamber configured to receive a fluid. A diaphragm assembly is configured to be displaced whenever the fluid within the fluid chamber is displaced. A transducer assembly is configured to monitor the displacement of the diaphragm assembly and generate a signal based, at least in part, upon the quantity of fluid displaced within the fluid chamber.

Abstract: A sensor system detects the occurrence of two-phase flow by comparing records of fluidelastic force coefficients, which are characteristically different for single-phase and two-phase flows. A baseline of measurements is obtained for a single phase flow, and a baseline of measurements is obtained for a two-phase flow. Measurements of the amplitude and phase of the fluidelastic forces are recorded, and the corresponding fluidelastic force coefficients computed. The fluidelastic force coefficients can be determined for any flow, and compared to the baselines to determine whether the flow is a single-phase or two-phase flow.

Abstract: An object of the present invention is to provide a thermal type flow rate sensor that offers high sensitivity and improved reliability. A sensor element according to the present invention includes a semiconductor substrate, a cavity portion formed on the semiconductor substrate, a heating resistor formed on the cavity portion via an electrically insulating film, a heating temperature sensor for detecting heating temperature of the heating resistor, and a driving circuit for controlling the heating temperature of the heating resistor using the temperature detected by the heating temperature sensor. The heating temperature sensor comprises temperature-sensitive resistors having resistance values varying according to temperature and disposed upstream and downstream of a direction of flow of a fluid to be measured relative to the heating resistor and on upper and lower sides in a direction perpendicular to the direction of flow of the fluid to be measured relative to the heating resistor.

Abstract: An ultrasonic flow meter is equipped with a housing through which a liquid flows, and a pair of detection units disposed on opposite ends of the housing and including acoustic wave transmitting and receiving units capable of transmitting and receiving acoustic wave signals. Vibration generating mechanisms having vibration generating bodies arranged perpendicularly to the detection units are disposed on an outer circumferential side of the housing. In addition, when the flow rate of the liquid that flows through the housing is measured, the vibration generating bodies are energized and made to vibrate, such that gas bubbles, which adhere to cover members in contact with the liquid and that cover the acoustic wave transmitting and receiving units, are removed by the vibrations.

Abstract: The invention relates to an ultrasonic flow meter arranged to measure a flow rate of a liquid, the flow meter comprises a flow tube 2, optionally a measurement insert, and two or more ultrasonic transducers 8 which are arranged in transducer inserts 20 to be inserted into the flow tube through openings in the flow tube. The transducer inserts are formed monolithically with the housing as a part of the bottom of the housing. The transducer inserts are in a mount position inserted through the openings in the flow tube to extend into the flow passage so that the surface 15 of the transducer inserts protrude into the flow passage. In this manner, gas bubbles, such as air bubbles, released from the flowing liquid will not rest in front of the transducer insert irrespectively of the orientation of the flow meter in the pipe installation.

Abstract: An axial-flow type impedance water flow sensor comprises a water wheel (3), a cyclone (4), a metal detection needle (7) and a detection circuit. The cyclone (4) is mounted at a water inlet side (5) of a water pipe (1), a bracket (2) is mounted at a water outlet side (6) of the water pipe (1), and the water wheel (3) is movably mounted between the bracket (2) and the cyclone (4). The water wheel (3) is provided with at least two blades (3-2) that are arranged uniformly. An upper end portion and a lower end portion (3-1, 3-4) of a rotation shaft of the water wheel (3) are fixedly connected to a center of the bracket (2) and a center of the cyclone (4) respectively through a bearing. A metal detection needle (7) is mounted on a wall of the water pipe corresponding to the water wheel (3), and has one end surface located on an inner wall surface of the water pipe (1) and the other end being connected to a signal input end of the detection circuit.

Abstract: A magneto inductive, flow measuring device comprising a measuring tube and at least one magnet system arranged on the measuring tube. The magnet system has two coil systems, which lie opposite one another on or in the measuring tube, and each coil system includes at least one pole shoe. A first of the two coil systems is connected via at least one flux return, sheet metal length with the second or an additional coil system, and wherein each of the at least two coil systems has at least two coils, which are arranged peripherally distributed relative to the measuring tube on the pole shoe.

Abstract: A portable physical therapy/rehabilitation/exercise device is provided for evaluating the condition of a patient and for evaluating and tracking the progress made by a patient over time. The device is hand held and has an evaluation mode to determine the current condition of the patient. The device also has a manual exercise mode and a preset exercise mode. During exercises in each mode all of the data pertaining to the forces (compression, tension, torque, and the like) are all stored in the device along with other kinds of quantitative and qualitative data. The stored data may be uploaded to the internet or external computer system in order to be further analyzed. The device is suitable for use by doctors, health care providers, insurance companies and other entities having an interest in the medical condition of the user.

Abstract: Systems and methods for flow sensing in a conduit are provided. One system includes a flow disturber disposed in a flow conduit and configured to impart a flow disturbance to the fluid flow. The system further includes a plurality of flow sensors disposed in the flow conduit and responsive to flow characteristics in the flow conduit. The system also includes a frequency resolver configured to determine frequency information related to the fluid flow based on the flow characteristics. The frequency resolver uses one or more time sample windows to select data samples for use in determining the frequency information, wherein a length of one or more of the time sample windows is based at least in part on the flow characteristics. The system additionally includes a processor configured to determine a flow rate of the fluid flow in the flow conduit using the frequency information.

Abstract: A flowmeter includes a first chamber and a second chamber connected through a channel. The first chamber is provided with a first deformable membrane and with first and second gauges. The second chamber is provided with a second deformable membrane and with third and fourth gauges. The four gauges form a Wheatstone bridge.

Abstract: A magneto inductive flow measuring device having a measuring tube and at least one magnet system arranged on the measuring tube, wherein the measuring tube has at least one planar area and an otherwise cylindrical lateral surface, which border the measuring tube from its environment, against which planar area the magnet system is prestressed The magnet system is prestressed against the planar area of the measuring tube by means of a screwed connection between measuring tube and magnet system and/or the magnet system is prestressed against the planar area of the measuring tube by means of a mounting clip, which is secured shape-interlocked to the measuring tube. A method for manufacturing the magneto inductive, flow measuring device is also discussed.

Abstract: A differential pressure flow sensor that includes a plurality of channels divided into multiple sets of channels having different characteristics. Primary channels establish fluid communication between an inlet and an outlet of the flow sensor. Secondary channels establish fluid communication between the inlet and a first pressure port, but not the outlet. Tertiary channels establish fluid communication between the outlet and a second pressure port, but not the inlet. Signals generated at the first and second pressure port are used to determine a rate of flow through of gas through the sensor. Due to the structural features of the device, the phase delay of individual oscillatory flow components compared to corresponding oscillatory pressure components remains substantially constant across a wide range of flow rates.

Abstract: The invention provides a probe for a flowmeter which can be employed in various flow measuring devices utilizing semiconductor or ceramic thermistors. The invention comprises an apparatus for determining the fluid flow rate of a liquid passing through a conduit made of a material having a low thermal conductivity, comprising a probe disposed at least partially inside the wall of the conduit, part of the probe being substantially aligned with an inner surface of the wall, the probe being operationally connected to a control and display unit. The probe comprising a printed circuit board (PCB) on which at least two thermistors are mounted; an upstream thermistor serving for baseline measurements and a spaced apart downstream self-heated thermistor. The control and display unit repeatedly measuring the electrical resistance of the thermistors to generate signals which are electronically processed by the control and display unit to indicate flow rates.

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.