The sensor assembly comprises: a bowl shaped, namely at least sectionally dished, membrane, with a curved surface and an oppositely lying surface; and a sensor blade extending from curved surface of the membrane. The membrane is so formed that at least one region of the curved surface adjoining the sensor blade is convex. A sensor formed by means of such a sensor assembly and by means of a transducer element coupled therewith and serving for generating a sensor signal representing movements of the sensor blade changing as a function of time and/or deformations of the membrane changing as a function of time, or a measuring system formed by means of the sensor and a measuring electronics connected thereto, can be used for registering pressure fluctuations in a flowing fluid, such as, for instance, a 400 C hot steam, for instance, in order to measure a flow parameter of the fluid.

A flow tube (10) has a housing (12, 14) including at least a first housing half (12) and a second housing half (14). Each housing half (12, 14) has a connection surface (20, 22) intended for combination with the other housing half (12, 14). The connection surfaces (20, 22) enclose a mounting gap (30) for an orifice element (16). Outside of the mounting gap (30) the connection surfaces (20, 22) butt against each other in some sections by respective abutting surface portions (32, 34), and outside of the mounting gap (30) and outside of the abutting surface portions (32, 34) the housing halves (12, 14) are integrally combined with each other. A method is provided for producing the flow tube, namely for integrally joining the housing halves (12, 14).

Fluid dosing system (1) comprising: a dosing chamber (3) divided in a fluid-tight manner by means of a displaceable membrane (5) into: a) a dosing compartment (3a); and b) a working fluid compartment (3b) filled with a working fluid having a bulk modulus of at least 1 GPa; a first fluid port (3c) in fluidic communication with said dosing compartment (3a); a second fluid port (3d) in fluidic communication with said working fluid compartment (3b); an expansion reservoir (9) in fluidic communication with said fluid second port (3d) and filled with said working fluid; a bidirectional pump (7) in fluidic communication with said second port (3d) and said expansion reservoir (9) so as to be able to pump said working fluid bidirectionally between said working fluid compartment (3b) and said expansion reservoir (9); a flow sensor (13) arranged to measure flow of said working fluid based on displacement of at least part of said expansion reservoir (9).

A fluid dispensing device having a flexible fluid pouch and a dispensing assembly, the dispensing assembly having a top piece and a bottom piece, the top piece having a flexible actuator including a flexible dome and a flexible flange extension, the bottom piece having a bottom portion of a pump chamber, a pump chamber inlet, a chamber inlet valve, and a bottom portion of an outlet valve, the top piece and the bottom piece mated together to form a pump chamber and an outlet valve, said device configured to allow bidirectional fluid flow through either or both inlet and outlet valves, and to dispense a volume of fluid that is less than the volume of said pump chamber. The flexible pouch may have a single opening or two openings. In the case of a single opening, the entire dispensing assembly is in the interior of the pouch. In the case of two openings, only the flexible dome extends to the exterior of the pouch. The outlet valve is configured so that the more pressure that is applied to the flexible fluid pouch, the more tightly the outlet valve seals.

A physical quantity measurement device measures a physical quantity of a fluid. A detection unit has a physical quantity detector that detects a physical quantity of the fluid in a measurement flow channel. A housing accommodates at least a part of the detection unit and forms the measurement flow channel. The housing includes a housing attachment that is attached to a predetermined attaching target, and a position holder holding a position of the detection unit by contacting the detection unit. The housing includes an inward part positioned inward of the attaching target and an outward part positioned outward of the attaching target. The position holder is provided inward of the housing attachment in an alignment direction along which the inward part and the outward part are aligned.

A physical quantity measurement device measures a physical quantity of a fluid. A detection unit has a physical quantity detector that detects a physical quantity of the fluid in a measurement flow channel. A housing accommodates at least a part of the detection unit and forms the measurement flow channel. The housing includes a housing attachment that is attached to a predetermined attaching target, and a position holder holding a position of the detection unit by contacting the detection unit. The housing includes an inward part positioned inward of the attaching target and an outward part positioned outward of the attaching target. The position holder is provided inward of the housing attachment in an alignment direction along which the inward part and the outward part are aligned.

An air flow meter includes an inward part that is positioned inward of an intake pipe and an outward part that is positioned not inward but outward of the intake pipe. The air flow meter further includes a first detector provided in the inward part, and a second detector provided at a position closer to the outward part than the first detector.

Apparatus, systems and methods in which an oscillating piston fluid meter assembly comprises a cylinder housing separated by a piston into two chambers and measures the flow volume of a fluid by tracking the distance traveled by the piston along a pushrod running through the cylinder. Preferably, the oscillating fluid meter assembly has two inlets, two outlets, two end-caps, and four passages each coupling one inlet or outlet to a chamber. A valve is positioned at a junction between two passages and can simultaneously control the two passages by shutting them both or allowing only one of them to be open. Magnets, springs, and various damping mechanisms are used to control the movement of the pushrod. Since fluid cannot pass through the system without triggering the traveling of the piston tracked by a tracking device, the oscillating fluid meter is highly sensitive and can detect a very small flow volume.

Disclosed is a flow-rate measuring system for drilling muds and for multiphase mixtures (water/oil/gas) also with transport of solids or sand and in the presence of heavy oil. The system includes a flow-rate measuring system for drilling muds and/or for multiphase mixtures, wherein the measuring ports are equipped with an appropriate pre-chamber that enables elimination of the risk of failure of the measuring membranes in the case of particularly erosive mixtures and in the case of presence of solid by accumulation or transport. Furthermore, the particular vertical installation enables a compactness of the system in terms of horizontal encumbrance, enables installation where there is little horizontal space, and makes possible an undisturbed flow necessary for obtaining a higher measuring accuracy. The vertical installation enables installation, on the descending stretch, of a sensor for measuring the density that renders the measuring system autonomous (normally, the density is entered as external input).

Disclosed is a flow-rate measuring system for drilling muds and for multiphase mixtures (water/oil/gas) also with transport of solids or sand and in the presence of heavy oil. The system includes a flow-rate measuring system for drilling muds and/or for multiphase mixtures, wherein the measuring ports are equipped with an appropriate pre-chamber that enables elimination of the risk of failure of the measuring membranes in the case of particularly erosive mixtures and in the case of presence of solid by accumulation or transport. Furthermore, the particular vertical installation enables a compactness of the system in terms of horizontal encumbrance, enables installation where there is little horizontal space, and makes possible an undisturbed flow necessary for obtaining a higher measuring accuracy. The vertical installation enables installation, on the descending stretch, of a sensor for measuring the density that renders the measuring system autonomous (normally, the density is entered as external input).