Abstract: A method for determining a mass flow measurement is provided. The method comprises calibrating a flowmeter sensor at a first temperature and flowing a fluid having a second temperature through the flowmeter sensor. A density of the fluid is input into meter electronics. A compensated mass flow value of the fluid is determined by meter electronics, wherein the Modulus of Elasticity of the flowmeter sensor is unknown.

Abstract: The present invention relates to an electromagnetic flowmeter. The present invention provides an electromagnetic flowmeter for measuring flow of fluid flowing in a conduit of the electromagnetic flowmeter, wherein the electromagnetic flowmeter comprises: a pair of electrodes mounted on the conduit for measuring potential difference generated by the interaction of electromagnetic field in the fluid to determine the flow of fluid in the electromagnetic flowmeter; a processing unit, wherein the processing unit acquires signals from the pair of electrodes and processes the signal for measurement, a set of coils comprising at least two coils mounted on a surface of the conduit and excited by an excitation unit for generating an electromagnetic field, wherein a first coil from the set of coils is concentrically positioned with a second coil from the set of coil, and the second coil is placed within the enclosed surface area of the first coil.

Abstract: The present invention is directed to multiple arrangements of a self-disengaging pitot tube cover, which can be triggered by a plurality of different environmental conditions while the cover admits to a plurality of different latching mechanisms and opening configurations to guarantee the expeditious, automatic removal of the pitot tube cover while avoiding damage or contamination of the pitot tube itself.

Abstract: A magnetically inductive flowmeter includes a measuring tube having a tube axis and a tube wall; a magnet system for producing a magnetic field that extends perpendicularly to the tube axis; at least one pair of measuring electrodes for sensing an electrical voltage induced in the medium by the magnetic field; and an electronic measuring/operating circuit for operating the magnet system and the measuring electrodes. The magnet system includes a coil system having a coil having a coil core and further includes two pole shoes. The coil system includes a field guide-back, wherein a tangential fraction of the magnetic field in the coil relative to the measuring tube axis amounts to at least 90% of the total magnetic field. The field guide-back has a guide-back part that extends through the coil and forms the coil core of the coil.

Abstract: An apparatus and method for use in determining one or more fluid flow properties of a fluid in a conduit is disclosed. The apparatus includes a substrate including a barrier, a first flow sensor coupled to the substrate and a second flow sensor coupled to the substrate. The first flow sensor is located at a first sensor distance from a first barrier surface, and the second flow sensor is located a second sensor distance from the second barrier surface. The first sensor distance is substantially equal to the second sensor distance. In operation, the first flow sensor produces a first sensor signal, and the second flow sensor produces a second sensor signal. The direction of flow for the fluid is determined by comparing the first sensor signal to the second sensor signal.

Abstract: A meter bypass assembly includes a housing and a valve assembly. The housing defines a first inlet and a first outlet, and a second inlet and a second outlet. The valve assembly is rotatable to a first position in which fluid is allowed to flow from the first inlet to the first outlet and from the second inlet to the second outlet. The valve assembly is also rotatable to a second position in which fluid is allowed to flow from the first inlet to the second outlet and is restricted from flowing from the first inlet to the first outlet and from the second inlet to the second outlet. The valve assembly includes a shaft extending in a longitudinal direction of the housing and first and second valve bodies rotationally fixed to opposing ends of the shaft.

Abstract: A pitot tube includes an outer tube extending from a first tube end to second tube end, the second tube end defining a tip portion of the pitot tube, the tip portion including an inlet opening. A tube sleeve inside of the outer tube at least partially defines a tube passage extending from the first tube end to the second tube end. The tube sleeve includes a sleeve outer surface having a sleeve body portion having a first outer diameter and a sleeve tip portion located at the tip portion of the pitot tube. The sleeve tip portion has a second outer diameter smaller than the first outer diameter. A heating element is located between the outer tube and the tube sleeve at at least the sleeve tip portion.

Abstract: Methods of inserting a sensor assembly into a flow pipe are disclosed. The methods may include fastening a preload nut into a hot tap housing, applying force to at least one handle connected to a stem to insert the sensor assembly into the flow pipe, and fastening a collar onto the stem. In one example, the collar is between the preload nut and the hot tap housing. And, in one example, the methods may include tightening the preload nut into the hot tap housing until the preload nut bottoms out at a hard stop.

Abstract: A monitoring device provided for monitoring the delivery of fluids through a drip chamber. The device includes an electromagnetic radiation (EMR) source and an EMR detector. The device includes a tubing set mount for receiving a flange or other portion of a tubing set, such that fluid falling through the drip chamber of the tubing set is detected by the detector. The device is operable to determine one or more rolling averages based on intervals of drops or time.

Abstract: A mass flow control apparatus is capable of controlling a flow rate of a fluid to a tool. Pressure of the fluid is regulated by a solenoid valve, which receives signals from a control module. Various set points may be inputted to the control module, whereby control module receives pressure sensor signals from across a flow restrictor and adjusts the solenoid valve to control the fluid flow rate to equal a set point.

Abstract: A method of manufacturing a flow measuring device having a rotatable element includes patterning an adhesive layer disposed on a first surface of a first sheet of a flexible material to remove portions of the adhesive layer in an area to define a location for a rotatable element, patterning the first sheet to define the rotatable element in the first sheet, adhering a pair of membrane layers of a second flexible material, to opposing surfaces of the patterned first sheet, with each of the pair of membrane layers having an electrically conductive layer on a surface thereof, patterning the electrically conductive layer to provide an electrode on each of the pair of membrane layers, and adhering a pair of sealing layers to surfaces of the pair of membrane layers.

Abstract: A clamp-on ultrasonic flowmeter includes a measuring tube, a pair of ultrasonic contact transducers, and an electronic measuring/operating circuit for operating the transducers. Each transducer includes a transducer element for generating and detecting ultrasonic signals and a coupling element. The transducer element is located on one side of the coupling element facing away from the measuring tube, and is designed to be acoustically coupled to the measuring tube via another side of the coupling element facing the measuring tube, and designed to transmit ultrasonic signals between the transducer element and measuring tube. The ultrasonic flowmeter comprises an adjusting device for at least one transducer for adjusting the transducer. The adjusting device is arranged and configured to modify at least one angle of the signal path with respect to the coupling face or a signal path length, wherein the adjusting device has at least two degrees of freedom.

Abstract: A method monitors an operation of a fluid meter mounted in a fluid-supplying fluid distribution system. Wherein, by use of an ultrasonic transducer, an event, in the form of a noise generated during the operation of the fluid meter or a pressure surge generated in the distribution system, which is not attributable to the flow measurement and which mechanically excites the ultrasonic transducer, is selectively detected and evaluated and, by reference to a result of the evaluation, at least one fluid meter-specific operating property is generated.

Abstract: The present application discloses a signal processing circuit (100), coupled to a first transducer (102) and a second transducer (104), wherein the first transducer and the second transducer have a distance greater than zero, and a fluid having a flow velocity flows sequentially through the first transducer and the second transducer, the signal processing circuit includes: a first transmitter (106), coupled to the first transducer; a first receiver (108), coupled to the first transducer; a second transmitter (110), coupled to the second transducer; a second receiver (112), coupled to the second transducer; and a control unit (114), coupled to the first transmitter, the first receiver, the second transmitter and the second receiver. The present application further provides a related chip, a flow meter and a method.

Abstract: Provided is a Coriolis flow sensor assembly that includes a flow tube configured to provide a flow path through the flow tube. Further, the Coriolis flow sensor assembly includes a mechanical drive assembly configured to drive an oscillation of the flow tube while fluid is flowing via an oscillation surface. The Coriolis flow sensor assembly includes an interface fixedly coupled to the oscillation surface of the mechanical drive assembly and configured to receive the flow tube.

Abstract: The present disclosure relates to a mass flow meter according to the Coriolis principle, comprising two measuring tube pairs which have different usage mode natural frequencies, an exciter for exciting flexural vibrations and a vibration sensor pair for detecting flexural vibrations; and comprising a circuit for driving the exciters and for detecting signals of the vibration sensors, for determining flow-dependent phase differences between the signals of the inlet-side and outlet-side vibration sensors and for determining mass flow measurement values based on the flow-dependent phase differences, wherein the circuit is configured to perform, when determining the mass flow measurement values based on the flow-dependent phase differences, a zero-point correction for the first measuring tube pair and/or the second measuring tube pair using signal amplitude ratios of the measuring tube pairs.

Abstract: A flow meter includes at least two spaced-apart measuring sensors, preferably ultrasonic sensors, wherein the coupling in and out of the measurement signals in or out of a fluid occurs via a coupling part which is inserted into a circumferential wall of a measuring channel produced via hydroforming. Alternatively, the coupling in and out of the measurement signals can also occur through a wall of the measuring channel.

Abstract: An air date probe includes a strut assembly extending from a base, and a tube assembly coupled to the strut assembly. One or both of the strut assembly and the tube assembly comprises a self-regulating thin film heating arrangement. The self-regulating thin film heating arrangement includes at least one circuit including a positive temperature coefficient (PTC) heating element connected in series with a negative temperature coefficient (NTC) heating element.

Abstract: An arrangement of acoustic transducers for a flow meter. The flow meter is for measuring the rate at which fluid is flowing. The arrangement includes a respective transducer set for each edge of a notional regular polygon. The transducer sets are associated with a tubular cavity for carrying the fluid. Each of the transducer sets respectively includes two acoustic transducers oriented to define an acoustic path lying in a measurement plane of the respective set, and another two acoustic transducers oriented to define another acoustic path lying in the measurement plane of the respective set. The transducers sets are positioned so that, in a cross-section normal to the tubular cavity, the measurement plane of each respective transducer set is coincident with a respective edge of the notional regular polygon.

Abstract: An apparatus indicates the presence of a threshold directional differential pressure between separated adjacent spaces. A conduit contains a movable element that indicates whether the pressure difference between the two spaces is at least as high as a threshold pressure difference. The apparatus is adjustable to have different threshold set points by adjusting the conduit inclination. The conduit may be rotatable about an axis of rotation which is transverse to a barrier, and the conduit may be rotatable along a plane. The apparatus may include a pitch level configured to indicate whether the apparatus is oriented correctly with respect to pitch.