A fluid sensor for monitoring a flow tube of a fluid flow system is provided. The fluid sensor comprises a housing to hold a portion of the flow tube, and the housing defines a first cavity, a second cavity, a first fixture and a second fixture. The fluid sensor comprises an ultrasonic transducer disposed within the first cavity and a force sensor disposed within the second cavity. The ultrasonic transducer has an emitting face to emit ultrasonic signals, and the emitting face is configured to face the portion of the flow tube. The first fixture extends along a boundary of the first cavity and the second fixture extends along a boundary of the second cavity.

A system, method, and apparatus for reducing ringing effects associated with a transducer comprises a transducer body, a transducer cap, a piezoelectric element formed in the cap, and a damping material formed around the piezoelectric element wherein the damping material suppresses a ringing effect associated with the transducer, while an O-ring is used together with damping material to support high pressure applications up to 230 bars.

A system includes a flow sensor contained within a flow sensor housing, a base, and a seal. The base houses a controller that generates at least one operation modification signal, and the flow sensor is separable from and mountable onto the base. A bottom surface of the flow sensor housing includes the seal. The seal forms a liquid-tight engagement between the flow sensor housing and the base when the flow sensor is mounted onto the base.

A device for determining and/or monitoring at least one process variable of a medium in a container includes four, rod-shaped elements arranged on a membrane, three piezoelectric elements and an electronics system, wherein one first and one second rod-shaped element are arranged and configured such that they form a mechanically vibratable unit, wherein the device is configured to excite the vibratable unit via an excitation signal to create mechanical oscillations, to receive the mechanical oscillations of the vibratable unit, to convert them into a first received signal, to transmit a transmitted signal, and to receive a second received signal, and wherein the electronics system is configured to determine the at least one process variable based on the first and/or second received signal.

A multi-path acoustic signal apparatus, system, and apparatus for use in material detection are provided. The apparatus has a plurality of acoustic sensors positioned along a first portion of a fluid container. At least one acoustic signal is transmitted into the fluid container by each of the plurality of acoustic sensors. At least one additional acoustic sensor is positioned along a second portion of the fluid container, wherein the second portion is substantially opposite the first portion. The at least one additional acoustic sensor receives at least a portion of the acoustic signals from the plurality of acoustic sensors. A reflected acoustic signal is generated from an impedance barrier between the fluid container and a fluid therein. A characteristic of a material of the fluid container and/or the fluid therein are determined.

A device for monitoring underwater surface overflow seepage of a landslide includes an underwater seepage monitor arranged on an underwater sliding mass, the underwater seepage monitor includes a bearing housing, a flow guide pipe, a silt discharging cover plate and a silt discharging mechanism, the silt discharging mechanism driving the silt discharging cover plate to be switched between a blocking position and an opening position. Considering complex environmental factors, a multifunctional flow monitor is embedded into a sliding mass and surrounds an outlet of the underwater landslide seepage. A silt discharging hole is provided in the bearing housing, the silt discharging mechanism is configured to drive the silt discharging cover plate to be located at the opening position, and silt in the bearing housing may be discharged from the silt discharging hole, such that the problem of silt deposition caused by overflow seepage of an underwater landslide is solved.

A fuel flow measuring system includes an ultrasonic fuel flow sensor. The fuel flow sensor includes a first transducer and a second transducer. The first transducer is excited at multiple different excitation frequencies and a voltage, an electric current, and a phase difference between the voltage and the electric current is sensed at the first transducer during excitation. Data points are generated based on the sensed readings and a model is fit to the data points to determine a complex impedance spectrum. The complex impedance spectrum indicates a range of excitation frequencies within a range of a peak resonance frequency of the first transducer. One or more characteristics of excitation signals directed to the second transducer are set based on the determined complex impedance spectrum. In this manner, the signal to noise ratio of ultrasonic signals emitted by the second transducer and received by the first transducer can be maximized.

The present disclosure relates to a measurement tube including a tubular main body, which has a wall and a lumen, and a sensor holder, which is arranged on and integrally bonded to an outer lateral surface of the wall of the main body, opposite the lumen, the sensor holder configured to be mechanically connected to at least one sensor component for sensing at least one measurement variable of a measurement material located in the lumen. The sensor holder is at least partly produced by an additive manufacturing method directly on the lateral surface of the wall of the main body. In a method for producing such a measurement tube, liquefied material is applied to the outer lateral surface of the wall of the main body and allowed to resolidify there to form a part of the sensor holder, which part is integrally bonded to the wall of the main body.

A separation type multiphase flow meter apparatus (10) comprising a separation module (18) arranged to at least partially separate a multiphase stream comprising water, hydrocarbon liquid and hydrocarbon gas into a first sub-stream comprising a gas fraction and a second sub-stream comprising a liquid fraction. The apparatus comprises a first metering device (16) for measuring the flow rate of the first sub-stream, and a second metering device (17) for measuring the phase fraction and the flow rate of the second sub-stream, wherein the second metering device is arranged to measure the water-in-liquid ratio (WLR) of the second sub-stream, wherein the apparatus is arranged to use the WLR measured by the second metering device as a measure also for the WLR of the first sub-stream, and wherein the cross-sectional flow area of the first metering device is larger than the cross-sectional flow area of the second metering device.

A flow meter for determining the flow rate of a fluid through a conduit, including an upper body having an inlet chamber, an acoustic channel, an outlet chamber, a sound wave generator, and a sound wave receiver. The inlet chamber, acoustic channel, and outlet chamber are fluidly connected together and are oriented so as to create a symmetrical fluid pathway through the inlet chamber, the acoustic channel the outlet chamber. The sound wave generator and the sound wave receiver are aligned along a longitudinal axis of the acoustic channel and the sound wave generator is creates a sound wave that moves along the longitudinal axis of the acoustic channel as fluid flows through the acoustic chamber. The receiver detects that sound wave that has moved through the acoustic channel and such information is used to determine the flow rate of the fluid through the flow meter.