Abstract: A flow conditioner for conditioning a fluid flow comprises a pipe that has a pipe axis and that can be flowed through by a fluid in the direction of the pipe axis; and at least one hub body that is rotationally symmetrical with respect to an axis of symmetry and that is fixed in the pipe such that the axis of symmetry coincides with the pipe axis, wherein the hub body fixed in the pipe has an onflow region that is arched outwardly against the onflow direction.

Abstract: The invention relates to a flow measuring device comprising a meter body having a conduit for the fluid, two phased-array ultrasonic transducer units spaced apart in the longitudinal direction of the conduit, which can emit and receive ultrasonic signals at different angles, a control and evaluation unit for driving the ultrasonic transducer units and evaluating the received ultrasonic signals and determining the flow using the transit time of the ultrasonic signals on the measuring paths.

Abstract: An inspection device for an ultrasound flow meter is provided that has an inspection chamber having a fluid at a flow velocity of zero and having a first installation station for a first ultrasonic transducer and having a second installation station for a second ultrasonic transducer of the ultrasound flow meter so that the ultrasonic transducers are aligned toward one another in the installed state and span an ultrasound measurement path through the inspection chamber on the connection line. The invention further relates to a method of inspecting and/or calibrating an ultrasound flow meter.

Abstract: Flow velocity of a fluid is measured using a measuring sensor comprising a conduit with a conduit wall, and at least two ultrasonic transducer units (20, 22), each of which consists of an array of individual ultrasonic transducers (30-x, 32-x) and defining a measuring path (24) between them in the conduit (14). The ultrasonic transducer units emit ultrasonic signals and received ultrasonic signals are evaluated to determine the flow velocity. The individual ultrasonic transducers are driven with different phase, so that the ultrasonic transducer units provide a phased array. In order to achieve the most accurate measurement results possible, the ultrasonic transducer units contact the outside of the conduit wall (16), and the conduit wall (16) is formed in the area of the contact with a wall thickness (w) that is less than half the wavelength of the transverse wave (?Rohr) of the ultrasound in the conduit wall.

Abstract: An ultrasonic flowmeter comprising a conduit in a support housing and at least two ultrasonic transducers in a measuring insert which can be inserted into the support housing and the conduit perpendicularly to the conduit. The conduit comprises a circular cylindrical receptacle with a diameter larger than the inside diameter of the conduit and a depth encompassing the inside of the conduit, for inserting the measuring insert into the conduit perpendicular to the flow direction. Four ultrasonic transducers are provided in a wall of the measuring insert, the transducers define at least two measuring paths which cross each other in top view. The transducers are arranged in the measuring insert wall such that ultrasonic signals emitted and received by the ultrasonic transducers on the measuring paths have a transit time difference th?tr dependent on the flow velocity v and/or the flow rate Q of a fluid flowing in the conduit.

Abstract: An ultrasound flow measurement apparatus (10) for determining the flow rate of a fluid flowing in a line (12) is provided having at least one measurement path (18) at which a first ultrasonic transducer (16a) and a second ultrasonic transducer (16b) are arranged opposite one another with the flowing fluid between them, and having an evaluation unit that is configured to calculate the flow rate from a time of flight difference of ultrasonic pulses along the measurement path (18) in the direction with the flow (14) and against the flow (14). The ultrasonic transducers (16a-b) here are positioned such that a specific part pulse is isolated in time in a received signal of the respective receiving ultrasonic transducer (16a-b), with the part pulse corresponding to a direct sound, a reflected sound, an axially broken fluid sound, or an azimuthally broken fluid sound.

Abstract: The invention relates to a measurement transducer feed device for process automation technology that is configured for the energy supply of a measurement transducer and for forwarding measurement signals of the measurement transducer to a control unit, wherein the measurement transducer feed device has at least two connecting contacts that are configured for coupling the measurement transducer feed device to the control unit, with a current loop being formed between the two connecting contacts, and with the current loop comprising a power tap that is configured to supply the measurement transducer with electrical energy. The measurement transducer feed device is characterized in that the current loop comprises a current regulation module that is connected or connectable in series to the power tap and to the measurement transducer.

Abstract: An ultrasound flow measurement apparatus is provided having a plurality of ultrasonic transducers for determining the flow rate of a fluid flowing in a line, said ultrasound flow measurement apparatus having a plurality of measurement paths at which two respective ones of the ultrasonic transducers are arranged opposite one another with the flow being arranged therebetween and with a mutual axial spacing in the longitudinal direction of the line and having an evaluation unit that is configured to calculate the flow rate from time of flight differences of ultrasonic signals along the respective measurement paths in the direction with the flow and against the flow. The measurement paths have different axial offsets here.

Abstract: An optical analysis device for determining particulate matter includes three light sources having different wavelengths, an apparatus for combining the three transmitted light beams on a common optical path, a measurement volume, an optical axis in the forward scattering direction defines the scattering angle 0°, a light absorption apparatus at 0° that absorbs unscattered light, and six detectors which are arranged at different specified angles which are as close as possible to 0° directly next to the light absorption apparatus, at a second scattering angle between 7° and 40°, at a third scattering angle between 41° and 70°, at a fourth scattering angle between 71° and 115°, at a fifth scattering angle between 116° and 145°, at a sixth scattering angle between 146° and 180°. A control and evaluation unit controls the light sources such that the scattered light is detected in a wavelength selective manner by the detectors.

Abstract: A measurement apparatus (10) and to a method provide for the determination of a flow rate (v) and/or of a throughflow (Q) of a fluid (14) flowing in a conduit (12). At least one first ultrasonic transducer (18) and one second ultrasonic transducer (20) permit a flow rate determination via the time of flight of an ultrasound signal. To further improve the determination of a flow rate of a fluid using ultrasonic transducers, in particular at very high flow rates, and to enable the measurement of very high flow rates, a noise-measuring ultrasonic transducer (18, 20; 24) is provided that measures the noise generated in on the flowing past of the fluid (14) in the ultrasonic transducer, and a control and evaluation device (32) is configured to determine the flow rate (v) using the noise measurements.

Abstract: The invention relates to a measurement apparatus for measuring a flow rate of a fluid that flows with a main direction of flow in a circular line comprising an inlet section for conducting the fluid from the circular line into the measurement apparatus; an outlet section for conducting the fluid from the measurement apparatus into the circular line; a measurement section for connecting the inlet section to the outlet section; at least one ultrasound device for transmitting and/or receiving ultrasound waves, wherein the ultrasound device is arranged at a wall of the measurement section; and an evaluation unit for carrying out a time of flight difference measurement and for determining the flow rate, wherein the inlet section has a first superelliptic transitional shape and the outlet section has a second superelliptic transitional shape and the measurement section has a rectangular form, in particular having rounded corners.

Abstract: The flow speed of a fluid (12) flowing in a conduit (14) is measured using at least one ultrasonic transducer (18a-b) that is attached to the conduit wall (22) from the outside The transducer (18a-b) has an oscillating body (34) that couples to a part region (32) of the conduit wall (22) that acts as a membrane of the ultrasonic transducer (18a-b) that can vibrate. A coupling piece (36) whose cross-section is smaller than the cross-section of the oscillating body (34) is arranged between the membrane (32) and the oscillating body (34).

Abstract: A method of manufacturing an ultrasound flow rate measurement apparatus is provided, wherein at least one pocket for an ultrasonic transducer is manufactured from the outside in a line wall of a line section in which a fluid flows in operation and an ultrasonic transducer is arranged in the pocket, wherein the ultrasonic transducer has an oscillating body that couples to a part region of the line wall and that acts as a membrane of the ultrasonic transducer capable of vibration. In this respect, a manufacturing step of the pocket has a drilling procedure and a coupling piece is manufactured with the pocket and is arranged between the membrane and the oscillating body after the insertion of the ultrasonic transducer and its cross-section is smaller than the cross-section of the oscillating body.

Abstract: The invention relates to an improved and simpler method and to an apparatus for the determination of the CO2 emission factor in flare gas plants comprising the steps: a) measuring the speed of sound in the flare gas; b) detecting known proportions of N2, CO2 and H2O; c1) calculating a maximum speed of sound of the flare gas under the assumption that the hydrocarbon proportion of the flare gas only consists of alkanes having a chain length i; c2) calculating a minimal speed of sound of the flare gas under the assumption that the hydrocarbon proportion of the flare gas only consists of alkanes having a chain length i+1; c3) varying the chain length i for so long until the measured speed of sound lies between the calculated minimal speed of sound and the calculated maximum speed of sound; d) varying the proportions of the alkanes having the chain length i and the chain length i+1 determined in step c) for so long until the speed of sound calculated with these proportions lies within a predefined difference from

Abstract: An ultrasound measuring apparatus for measuring the flow rate of a fluid in a conduit having two measurement systems is provided that each have at least one pair of ultrasound transducers that span a measurement path between them and that each have a control unit to determine transit times from ultrasound transmitted and received with and against the flow. In this respect, the control units are each configured to fix measurement times for a transit time determination on a measurement path autonomously and independently of one another in accordance with a rule that produces a respective different sequence of the measurement times in both measurement systems.

Abstract: An ultrasonic flowmeter for measuring the flow speed and/or the volumetric flow rate of a fluid includes a measurement sensor, at least two ultrasonic transducers, a pressure sensor, and a calibration connector. The ultrasonic flowmeter allows a simple and inexpensive calibration of the pressure sensor in the flowmeter.

Abstract: An optical sensor comprises a light transmitter; a light receiver; an evaluation unit; at least one mirror unit that comprises a plurality of micromirror elements having an at least regionally reflective surface and comprising an electrode arrangement connected to the micromirror elements; and a control device that is configured to adjust the mirror unit between at least two different functional states by controlling the electrode arrangement. The mirror unit comprises an at least substantially transparent substrate at which the micromirror elements are arranged. The control device is configured to temporarily set the mirror unit into a transmission state in which the micromirror elements are in an open position and light radiation incident onto the mirror unit moves past the micromirror elements through the transparent substrate.

Abstract: A method for recognizing the presence of liquid (30) in a gas flow flowing in a pipeline uses an ultrasound flowmeter (10). Measurement paths are provided in pairs which are displaced vertically by an equal predefined distance with respect to the center axis such that one lies in an upper region above the center axis and one lies beneath the center axis. A check is made in three stages to define various measurement values, turbulence values and speed of sound values. A liquid warning signal is output when an invalid measurement value is delivered in the first stage, or when the ratio of the turbulence values in the second stage differs from 1 by more than a predefined tolerance value, or when the ratio of the speeds of sound in the third stage differs from 1 by more than a predefined tolerance ratio.

Abstract: The invention relates to a flow conditioner for conditioning a fluid flow comprising a pipe having a constriction with a reduced pipe cross-section, at least one ring-shaped element arranged inside the pipe which has an outer diameter which is smaller than the inner diameter of the pipe in the axial region of the pipe in which the at least one ring-shaped element is arranged, and having an areal web whose surface normal is not in parallel with the pipe axis. The invention further relates to a throughflow measurement system for measuring a fluid throughflow through a pipe having a measurement device and a flow conditioner in accordance with the invention arranged upstream of the measurement device.