Abstract: A system and method to detect and quantify integration errors in a transit time ultrasonic flow meter uses dissimilar integration methods or schemes employed simultaneously. In a preferred embodiment, a number of chordal paths are arranged in a single meter body such that at least two dissimilar chordal integration schemes can be used to determine the flow rate. At least one of the chordal paths is common to both integration schemes. The total number of chordal paths needed in any chordal measurement plane is less than the sum of the chordal paths used in each of the integration schemes (as is the sum of the planes), thereby reducing hardware requirements.

Abstract: A system and method to detect and quantify integration errors in a transit time ultrasonic flow meter uses dissimilar integration methods or schemes employed simultaneously. In a preferred embodiment, a number of chordal paths are arranged in a single meter body such that at least two dissimilar chordal integration schemes can be used to determine the flow rate. At least one of the chordal paths is common to both integration schemes. The total number of chordal paths needed in any chordal measurement plane is less than the sum of the chordal paths used in each of the integration schemes (as is the sum of the planes), thereby reducing hardware requirements.

Abstract: A flow meter system and method measures fluid flow in a conduit. The conduit has a conduit axis. The flow meter includes a sensor configured to provide measurement data relating to the volumetric or mass flowrate though the conduit, and a processor configured to determine flow per unit time in the conduit using the measurement data, an uncertainty measurement per unit time using the measurement data, and an uncertainty quantity using the uncertainty measurement per unit time. The uncertainty quantity is totaled over a time period.

Abstract: A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A plurality of axial velocity measurements are made in each chordal plane. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

Abstract: A system and method to detect and quantify integration errors in a transit time ultrasonic flow meter uses dissimilar integration methods or schemes employed simultaneously. In a preferred embodiment, a number of chordal paths are arranged in a single meter body such that at least two dissimilar chordal integration schemes can be used to determine the flow rate. At least one of the chordal paths is common to both integration schemes. The total number of chordal paths needed in any chordal measurement plane is less than the sum of the chordal paths used in each of the integration schemes (as is the sum of the planes), thereby reducing hardware requirements.

Abstract: A system and method to detect and quantify integration errors in a transit time ultrasonic flow meter uses dissimilar integration methods or schemes employed simultaneously. In a preferred embodiment, a number of chordal paths are arranged in a single meter body such that at least two dissimilar chordal integration schemes can be used to determine the flow rate. At least one of the chordal paths is common to both integration schemes. The total number of chordal paths needed in any chordal measurement plane is less than the sum of the chordal paths used in each of the integration schemes (as is the sum of the planes), thereby reducing hardware requirements.

Abstract: A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A plurality of axial velocity measurements are made in each chordal plane. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

Abstract: A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A plurality of axial velocity measurements are made in each chordal plane. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

Abstract: An ultrasonic flowmeter includes a meter body including a flow passage having wetted surfaces through which fluid flow is to be measured. The flowmeter includes a non-stick coating adhered to the wetted surfaces of the meter body. The flowmeter includes a first transducer and at least a second transducer arranged around the flow passage to transmit and receive ultrasonic energy. The flowmeter includes an electronic unit designed to generate and receive electronic signals from the transducers and to process the signals in order to compute information related to the fluid flow rate through the passage. A method for measuring fluid flow with an ultrasonic flowmeter. A method of making an ultrasonic flowmeter.

Abstract: A flow conditioner for a circular pipe having an axis. The flow conditioner includes a plate having a face to be disposed in the circular pipe with the face of the plate perpendicular to the axis of the pipe. The plate has a central circular passage area through which fluid flows surrounded by two or more concentric arrays of segmented annular passages for fluid flow defined by separating and subdividing ligaments, with at least one subdividing ligament having a width different than a width of a second subdividing ligament. Alternatively, or in addition, there is at least one array of annular passages having a radial width different than a radial width of a second array of annular passages and at least one subdividing ligament having a width different than a width of a second subdividing ligament. A method of producing an optimized geometry of flow conditioner for a circular pipe having an axis.

Abstract: A system and method to detect and quantify integration errors in a transit time ultrasonic flow meter uses dissimilar integration methods or schemes employed simultaneously. In a preferred embodiment, a number of chordal paths are arranged in a single meter body such that at least two dissimilar chordal integration schemes can be used to determine the flow rate. At least one of the chordal paths is common to both integration schemes. The total number of chordal paths needed in any chordal measurement plane is less than the sum of the chordal paths used in each of the integration schemes (as is the sum of the planes), thereby reducing hardware requirements.

Abstract: A flow conditioner for a circular pipe having an axis. The flow conditioner includes a plate having a face to be disposed in the circular pipe with the face of the plate perpendicular to the axis of the pipe. The plate has a central circular passage area through which fluid flows surrounded by two or more concentric arrays of segmented annular passages for fluid flow defined by separating and subdividing ligaments, with at least one subdividing ligament having a width different than a width of a second subdividing ligament. Alternatively, or in addition, there is at least one array of annular passages having a radial width different than a radial width of a second array of annular passages and at least one subdividing ligament having a width different than a width of a second subdividing ligament. A method of producing an optimized geometry of flow conditioner for a circular pipe having an axis.

Abstract: A flow conditioner for a circular pipe having an axis. The flow conditioner includes a plate having a face to be disposed in the circular pipe with the face of the plate perpendicular to the axis of the pipe. The plate has a central circular passage area through which fluid flows surrounded by two or more concentric arrays of segmented annular passages for fluid flow defined by separating and subdividing ligaments, with at least one subdividing ligament having a width different than a width of a second subdividing ligament. Alternatively, or in addition, there is at least one array of annular passages having a radial width different than a radial width of a second array of annular passages and at least one subdividing ligament having a width different than a width of a second subdividing ligament. A method of producing an optimized geometry of flow conditioner for a circular pipe having an axis.

Abstract: A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A plurality of axial velocity measurements are made in each chordal plane. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

Abstract: A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A plurality of axial velocity measurements are made in each chordal plane. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

Abstract: An ultrasonic flowmeter includes a meter body including a flow passage having wetted surfaces through which fluid flow is to be measured. The flowmeter includes a non-stick coating adhered to the wetted surfaces of the meter body. The flowmeter includes a first transducer and at least a second transducer arranged around the flow passage to transmit and receive ultrasonic energy. The flowmeter includes an electronic unit designed to generate and receive electronic signals from the transducers and to process the signals in order to compute information related to the fluid flow rate through the passage. A method for measuring fluid flow with an ultrasonic flowmeter. A method of making an ultrasonic flowmeter.

Abstract: An ultrasonic flowmeter includes a meter body including a flow passage having wetted surfaces through which fluid flow is to be measured. The flowmeter includes a non-stick coating adhered to the wetted surfaces of the meter body. The flowmeter includes a first transducer and at least a second transducer arranged around the flow passage to transmit and receive ultrasonic energy. The flowmeter includes an electronic unit designed to generate and receive electronic signals from the transducers and to process the signals in order to compute information related to the fluid flow rate through the passage. A method for measuring fluid flow with an ultrasonic flowmeter. A method of making an ultrasonic flowmeter.

Abstract: A self-checking ultrasonic flow meter for measuring fluid flow in a conduit which includes a plurality of transducers engaged with the conduit. The flow meter includes a signal processor in electrical communication with the transducers which produces a measurement of flow rate and an associated estimate of uncertainty due to changes that have affected the accuracy of the measured flow rate. The transducers form multiple transducer pairs positioned to form acoustic transmission paths that are co-located in two or more chordal measurement planes. A method for measuring fluid flow in a conduit with an ultrasonic flow meter.

Abstract: A flow conditioner for a circular pipe having an axis. The flow conditioner includes a plate having a face to be disposed in the circular pipe with the face of the plate perpendicular to the axis of the pipe. The plate has a central circular passage area through which fluid flows surrounded by two or more concentric arrays of segmented annular passages for fluid flow defined by separating and subdividing ligaments, with at least one subdividing ligament having a width different than a width of a second subdividing ligament. Alternatively, or in addition, there is at least one array of annular passages having a radial width different than a radial width of a second array of annular passages and at least one subdividing ligament having a width different than a width of a second subdividing ligament. A method of producing an optimized geometry of flow conditioner for a circular pipe having an axis.

Abstract: A fluid nozzle for a pipe having a flow meter includes an inner surface having a contour. The contour is substantially defined by a compound of two ellipsoidal bodies of revolution which prevents negative pressure gradients in the fluid along the inner surface as fluid in the pipe flows through the nozzle in the pipe. The nozzle includes a throat, wherein a ratio of a diameter of the throat to a diameter of the pipe upstream of the throat is 0.7 or less.