A flow meter includes a pair of ultrasonic transducers. Each transducer includes a housing, a piezoelectric crystal disposed within the housing, and a mini-horn array coupled to the housing. The mini-horn array, which may be formed via a 3D printing technique, includes an opening-free enclosure, a closed cavity inside the enclosure, and a plurality of horns enclosed within the closed cavity. The horns include a horn base portion adjacent to a proximal end surface of the cavity and a horn neck portion that extends from the base portion in a direction away from the piezoelectric crystal and towards a distal end surface of the cavity. The horn neck portions are separated by spaces within the cavity, wherein the spaces between the horn necks may be filled with powder.

An ultrasonic meter (28) for measuring a flow-rate of a fluid is described. The ultrasonic meter (28) includes a flow conduit (5) for the fluid. The flow conduit (5) extends along a first axis (6) between a first opening (7) and a second opening (8). The ultrasonic meter (28) also includes one or more pairs of ultrasonic transducers (2, 3). Each pair of ultrasonic transducers (2, 3) is configured to define a corresponding beam path (9) intersecting the flow conduit (5) within a measurement region (12) of the flow conduit (5). The measurement region (12) spans between a first position (z.sub.1) and a second position (z.sub.2) spaced apart along the first axis (6). One or more portions of the measurement region (12) which are outside of any of the one or more beam paths (9) correspond to non-sampled volumes (12b). The ultrasonic meter (28) also includes one or more protrusions (34) extending along the first axis (6). At least part of each protrusion (34) is arranged to exclude fluid from at least part of one or more non-sampled volumes (12b).

A priming valve includes a fluid flow path, a fluid inlet configured to couple to a fluid outlet of a fluid channel including at least one sensor configured to characterize at least one attribute of a fluid, a fluid outlet, a valve seat, and a connector. The connector engages the valve seat to prevent fluid flow via the fluid flow path. The connector is configured to move relative to the valve seat in response to a threshold pressure within the fluid flow path to allow the fluid to flow via the fluid flow path. A flow sensor sub-assembly for sensing flow of a fluidic medicament may include a priming valve and at least one sensor of a fluid port configured to characterize at least one attribute of a fluid within an administrable fluid source. A method for readying a fluid sensor may use a priming valve.

A flow dampener for dampening pulsation in a fluid flow includes a body shell, a flexible membrane, and two flow ports. The body shell has an interior surface and an elongate groove formed on the interior surface. The flexible membrane is sealed to the interior surface of the body shell and covers the elongate groove. In some embodiments, the flexible membrane is over-molded onto the body shell. The flexible membrane cooperates with the elongate groove to form an elongate flow path for the fluid flow. The flexible membrane has a thickness in a range from 0.5 mm to 6 mm. As the membrane is flexible, it vibrates as the fluid flows through the elongate flow path, absorbs kinetic energy in the fluid flow, and thereby dampens pulsation in the fluid flow.

An equal mixture of gas flows from multiple inputs is provided to gas analysis instrumentation, despite the unequal gas flow properties of the inputs often seen in practice. E.g., due to unequal input sample line lengths. We provide gas flow symmetry into a gas manifold that provides the output(s) to the gas analysis instrument(s). Such symmetry has two parts—equal gas flow properties from a set of reference points (one reference point for each input) to the manifold, and equal pressures at the reference points. Such equal pressures can be provided for unequal input gas flow properties by having a bypass valve for each input controlled so as to equalize the pressures.

A phase power device, comprising: a circulation pipe (1) and a preset number of phase power control components (2), wherein the circulation pipe (1) is used to provide a channel for fluid circulation flow, and the preset number of phase power control components (2) are disposed on the circulation pipe (1) and used to drive fluid in the circulation pipe (1) to circulate and flow. Further provided is a fluid experiment system, comprising the phase power device. The phase power device and the fluid experiment system may enable the fluid to meet a set flow requirement during the experiment, thus reducing the use of auxiliary equipment, and reducing experiment costs.

A flow conditioner for use in a conduit includes a ring having a plurality of stepped elements disposed on an inner surface of the ring. A method for conditioning fluid using a flow conditioner includes coupling a flow conditioner to an interior surface of a conduit, flowing fluid through the conduit, contacting a surface of the flow conditioner with the flowing fluid, positioning a flow meter downstream of the flow conditioner, and measuring the flow profile of the fluid with the flow meter. Contacting the flow conditioner reduces one or more disturbances in a flow profile of the fluid. A flow conditioner includes a ring having at least one of a stepped element formed on an inner surface of the ring or a fin assembly coupled to the ring.

A flow meter records a flow rate and/or an amount of heat of a flowing fluid. A control and evaluation unit ascertains flow rate data and the fitting-dependent direction of through flow is automatically ascertained. A temperature measuring device has first and second temperature sensors for ascertaining a temperature difference between a feed temperature in the feed and a return temperature in the return. The fitting location of the first and second temperature sensors in the feed or the return is automatically ascertained by the control and evaluation unit on the basis of the temperature difference. The control and evaluation unit is automatically configured during first-time or re-installation of the flow meter such that the direction of flow through the meter is adapted to the fitted direction of through flow and/or the temperature sensors are assigned to the feed and the return, respectively.

A homogenization device for homogenization of a magnetic field with an non-magnetic carrier and compensation elements formed of a magnetic material, the carrier having a carrier wall and the carrier wall surrounding a carrier interior, in the homogenization device located in the magnetic field the magnetic field penetrating into the carrier interior through a first carrier region of the carrier wall and emerging from the carrier interior through a second carrier region of the carrier wall and each of the compensation elements which are located on the carrier contributing to the homogenization of the magnetic field at least in the carrier interior. In the homogenization device, handling during homogenization is improved in that there are recesses in the carrier wall and in each of the recesses at least one of the compensation elements can be directly inserted and removed.

A homogenization device for homogenization of a magnetic field with an non-magnetic carrier and compensation elements formed of a magnetic material, the carrier having a carrier wall and the carrier wall surrounding a carrier interior, in the homogenization device located in the magnetic field the magnetic field penetrating into the carrier interior through a first carrier region of the carrier wall and emerging from the carrier interior through a second carrier region of the carrier wall and each of the compensation elements which are located on the carrier contributing to the homogenization of the magnetic field at least in the carrier interior. In the homogenization device, handling during homogenization is improved in that there are recesses in the carrier wall and in each of the recesses at least one of the compensation elements can be directly inserted and removed.