Abstract: Cylinder lock and key with a rotatable plug in a cylindrical housing has radial slots each with two tumblers spring biased in the same direction and provided with side extensions for engaging a supporting spring. The side extensions are oriented opposite each other, and certain slots are spring biased in one direction and in other slots the tumblers are spring biased in another direction. The tumblers have cord projections protruding into a key channel and engaging control paths. The tumblers in series in odd slots are spring biased in one direction and in even slots are spring biased in the opposite direction, whereby their cord projections protrude in a direction orthogonal to sliding motion of the tumblers so that the cord projections are in each slot, substantially against each other and their lateral control edges adjacent the side projections cooperate with the control paths formed on the adjacent side walls of the control grooves in the key.

Abstract: Disclosed herein is the production of hydrocarbon based fuel from micro-organisms and algae that comprise algaenan without requiring prior removal of water, as well as the production of hydrocarbon based fuel directly from the algaenan itself. Also disclosed herein are feed material for the processes disclosed herein comprising modified algae and algaenan that selectively produce hydrocarbon of desired chain lengths, along with the process of modifying the algae and algaenan. Also disclosed herein is the production of both hydrocarbon and organic fertilizer from algae without the need to remove the water from the algae prior to processing.

Abstract: This invention relates to a storage stable fertiliser composition in the form of pellets or granules comprising an organic fertiliser in admixture with a water absorbent polymer. This invention also relates to a process for producing a storage stable fertiliser composition, the process comprising: i) mixing an organic fertiliser and a water absorbent polymer to form a mixture; ii) pelletising or granulating the mixture; and iii) drying the pellets or granules for a time and under conditions sufficient to form a storage stable fertiliser composition.

Abstract: Reduced volatility of urea fertilizers are prepared in accordance with the present invention by first preparing an N-(n-butyl)-thiophosphoric triamide (NBPT) solution by dissolving NBPT in a mixture of an amino alcohol having the formula 1—(H)x—N—((CH2)m—OH)n where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2—(H)y—N—((CH2)—CHOH—CH3)z such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0, and a carboxylic acid having 6 or fewer carbon atoms. The solution is then combining with a urea fertilizer in granular or liquid form.

Abstract: Mineral Lime is a composition having from about 85% to about 95% by volume of fly ash and from about 5% to about 15% by volume of kiln dust. A composition for Mineral Lime can also have from about 85% to about 95% by volume of Class C fly ash; and from about 5% to about 15% by volume of lime kiln dust. A process for producing a composition of Mineral Lime including fly ash and kiln dust, includes the steps of feeding fly ash to a blender; feeding kiln dust to the blender; and blending the fly ash and kiln dust in the blender.

Abstract: Disclosed are methods and a system for manufacturing a lead or lead alloy plate lattice for a lead-acid battery, comprising continuous extrusion of a melt of lead or lead alloy under temperatures lower by 10-100° C. than the melting point of lead, or the lead alloy, the extrudate being subsequently subjected to a flattening process under a temperature lower by more than at least 230° C. than the melting point of lead or the lead alloy, with a total draft rate less than 10%, and thereafter the extrudate may be processed so as to manufacture a plate lattice.

Abstract: The present invention has its object to provide an efficient, general use shaping technique for when forming high strength sheet metal into a three-dimensionally complicated shape. Further, the present invention provides a working apparatus for shaping sheet metal comprising a die (10) (also called a “punch”) which has a shape suitable for a shape of shaped sheet metal, a plurality of rolls (30 to 33) which grip sheet metal (H) with the die to shape the sheet metal, roll movement mechanisms (40) which makes the rolls independently move in a horizontal direction and make them independently ascend or descend in a vertical direction, and a roll angle setting mechanism which can change an angle by which the rolls are pressed against the die.

Abstract: A screw plug for a liquid conduit, particularly an oil pipe or an oil container, comprising a cylindrical shaft that is placed on a top plate and is provided with an external thread. A pocket hole having a polygonal cross section is centrally arranged on the top plate as a receiving member for a tool. The shaft is embodied as a tubular butt that is provided with the external thread. A pocket hole which is arranged coaxial to the pocket hole of the top plate extends from the face of the shaft. In order to produce the screw plug, a blank comprising the cylindrical tubular butt that is connected to the top plate in a molded on manner is made, the inner diameter and outer diameter of the tubular butt being smaller than the final corresponding diameters (e, f) of the screw plug. The tubular butt of the blank is then enlarged by applying pressure to the inner wall surface of the pocket hole thereof.

Abstract: Provided is a production method in which a steel having a good tensile strength can be produced with a small processing energy. The method is a method of producing a steel wire, the method including: a pre-drawing process in which a high-carbon steel wire containing 0.90 to 1.20% by mass of carbon is subjected to a drawing to obtain an intermediate wire; a heat treatment process in which the intermediate wire is subjected to a patenting heat treatment to obtain a heat treated wire; and a final drawing process in which the heat treated wire is subjected to a drawing to obtain a steel wire, wherein the amount ?f of drawing in the final drawing process which satisfies the relation represented by the following formula: ?f=2 ln (D0/Df) (wherein Df represents the final diameter of the steel wire obtained in the final drawing process, D0 represents the diameter of the heat treated wire before the final drawing process and ln represents natural logarithm) is 2.50 to 3.10.

Abstract: An apparatus and method for upsetting an end of a hollow workpiece to increase the wall thickness of that end is taught. A mandrel is inserted into the workpiece within a clamp which holds the workpiece. A die is urged into contact with the end of the workpiece to compress the end, decreasing its length and increasing the wall thickness of the end while the mandrel and clamp prevent deformation of the workpiece held in the clamp.

Abstract: A press brake tool assembly mounting device 42 comprising a body 66 which mounts a lower press brake tool 46, with a recess in the body 66 receiving in a moving fit a location member 52 mounted to a lower beam 44. A locking arrangement 80 is provided for locking the body 66 relative to the location member 52 in a friction fit, to retain the lower press brake tool 46 in a required position.

Abstract: A robot for the shaping of lingual archwires, including an anterior plate arced according to an anterior portion of a patient's teeth, wherein the anterior plate is capable of accepting an anterior portion of a lingual wire; a plurality of movable posterior bending units positioned posterior to the anterior plate, each bending unit capable of accepting a posterior portion of the lingual wire; a plurality of motors capable of selectively actuating each of the posterior bending units independently along at least one axis to bend the lingual wire along the at least one axis at a plurality of positions; a mother board in electrical communication with the plurality of motors and capable of receiving and executing instructions for desired dimensions of a lingual archwire; and a power source.

Abstract: A method for the dynamic monitoring of a first lambda probe arranged in an exhaust-gas duct of an internal combustion engine upstream of an exhaust-gas purification system. A period of an output signal of the first lambda probe is determined in a controller of the internal combustion engine, and a lambda regulating signal is determined from an output signal of a second lambda probe connected downstream of the exhaust-gas purification system. A first threshold value for a lengthening of the period of the output signal of the first lambda probe is predefined, in that a characteristic signal (46) is derived from the lambda regulating signal, in that a second threshold value for an inadmissible deviation of the characteristic signal (46) is predefined, and in that an inadmissible asymmetric delay of the first lambda probe is inferred if the lengthening of the period exceeds the first threshold value and the characteristic signal (46) deviates from the second threshold value outside predetermined limits.

Abstract: In control over an oxygen sensor, a temperature of the oxygen sensor, which detects a concentration of oxygen in exhaust gas from a combustion chamber in which anode off-gas of a fuel cell is burned, is adjusted to a target temperature, and an output of the oxygen sensor is calibrated. When the temperature of the oxygen sensor is adjusted to the target temperature, a plurality of the target temperatures are set, a calibration target temperature higher than or equal to a first predetermined temperature is selected from among the plurality of target temperatures when the output of the oxygen sensor is calibrated, and a target temperature, which is lower than the calibration target temperature, is selected from among the plurality of target temperatures during power generation of the fuel cell.

Abstract: This invention deals with a testing instrument that is used to investigate failure behavior of items subject to impact and sliding forces. The testing instrument produces an impact motion and a sliding motion in each testing cycle with maximum contact pressure similar to actual stresses applied to the items during real applications. The invented instrument simulates wear conditions and failure behaviors of biomedical implants, components, tools and coatings which are observed in practical applications.

Abstract: The inventive method is designed to test contaminants in soil that is contaminated with petroleum related products. The method involves the use of a container that will separate soil into a head space for analysis. The container consists of two halves and the container is partially filled with a soiled dirt specimen. The container is then hermetically sealed against the environment by way of a cover snapped over the container rim. The container with the contaminated specimen therein is allowed to accumulate a vapor head space within a certain time period. An instrument will puncture a sealed orifice in the top cover and a sample of the vapor is withdrawn for further analysis.

Abstract: The function of a measuring device can be tested using a healthy person as an external control, provided that this person fulfils certain criteria and that particular method steps are adhered to.

Abstract: A sensor chip (1030) for gas has cells (200) for emitting and receiving ultrasound and is configured for a sufficiently large frequency range and for measuring concentration of at least one of the gas components based on at least two responses within the range. The frequency range can be achieved by varying the size of cell membranes (230), varying bias voltages, and/or varying air pressure for an array (205) of cMUTs or MEMS microphones. The sensor chip can be applied in, for example, capnography. A measurement air chamber (515) is implemented in the respiratory pathway (400), and it and/or the pathway may be designed to reduce turbulence in the exhaled breath (120) subject to ultrasound interrogation. The chip (1030) can be implemented as self-contained in the monitoring of parameters, obviating the need for off-chip sensors.

Abstract: A sensor element of a gas sensor for determining gas components in gas mixtures, having at least one electrochemical measuring cell which is formed by a ceramic substrate and electrodes placed thereon. The sensor element includes at least one interior chamber which is sealed in a gas-tight manner, in which at least one first internal electrode is positioned, which forms an electrochemical cell with each of a second and an additional electrode of the sensor element, one of the electrochemical cells being an electrochemical pump cell, and the second or other electrode being exposed to the measuring gas.

Abstract: A method for operating a particle sensor (10). The particle sensor (10) has at least two inter-digital electrodes (12, 13) which engage one in the other and to which a sensor voltage U(IDE) (21) is applied in order to determine loading of the particle sensor (10) with soot particles (16). A sensor current I(IDE) (31) across the electrodes (12, 13) is measured and evaluated. In order to remove the loading with soot, a heating element (14) heats the particle sensor (10) in a regeneration phase. The method characterized in that the sensor current I(IDE) (31) is determined, and a shunt diagnosis of the particle sensor (10) is carried out in accordance with the measured sensor current I(IDE) (31).

Abstract: An in situ autosampling method and associated sampling device for capturing a material sample from a vessel. Methods of the present invention make use of a sampling device having an extendable sample capture element with a concave sample capture pocket located near a distal end thereof. The sample capture pocket is adapted to capture a known volume of material when the sample capture element is extended into said material. The material sample remains trapped in the sample capture pocket upon sample capture element retraction. Ports in the sample capture pocket may be placed in communication with corresponding material transfer channels extending through the sample capture element to allow for the in situ processing of a material sample, and the subsequent discharge of the sample to an analyzer or another downstream location.

Abstract: The instant disclosure provides a photoelectric gas sensor device and a manufacturing method thereof. The manufacturing method comprising the steps of: (A) providing at least two half-housing modules from at least one corresponding mold; (B) forming a reflecting layer on the ellipsoidal inner surface of the chamber unit; (C) forming a chamber unit having a reflective ellipsoidal inner surface defining a chamber space from the half-housing modules; (D) forming a reflecting layer on each inner surface of the two half-housings; and (E) disposing an emitter assembly having an energy emitter at the first focal point of the ellipsoidal chamber. A fine-adjustment mechanism may be further provided to enable clearance adjustment between the half-housing modules.

Abstract: The invention relates to novel methods and to devices for a measuring and analysis apparatus that measures impurities and/or particles in a gas or air. In a particle separation step, target particles having predetermined particle properties are separated from remaining particles from a gas or gas mixture such as air or a liquid, in short a fluid, that contains a particle mixture, and the occurrence and/or frequency of said target particles is determined in a measuring chamber. The likewise novel cooling of the radiation sources required for measurement permits the use of such having high power, as is required for measuring few particles or the smallest impurities. A further novel expansion of the electrical measurement range allows small but also abundant particles and impurities to be measured. In addition, a novel interface simplifies the start-up of the apparatus.

Abstract: Body fluid testing device for analyzing a body fluid comprises a test media tape adapted to collect the body fluid. The test media tape comprises a tape and test media portions. A free tape portion without test medium is located between successive test media portions. The testing device further comprises a supply portion. The supply portion comprises a housing in which uncontaminated test media tape is contained. The housing further has an opening for withdrawing test media tape from the housing. The testing device further has a sealing means for closing the opening against the surrounding. A free tape portion of the test media tape is located between a wall of the housing and the sealing means when the sealing means closes the opening. Further aspects concern a test media cassette with sealing means and a method for providing test media while holding them sealed against humidity during onboard storage.

Abstract: Provided is a fuel amount measuring device for a vehicle positioned in a fuel tank of the vehicle to thereby measure an amount of remaining fuel. The fuel amount measuring device is implemented as a mechanical fuel amount measuring device including a base body, a resistive substrate, a retainer, and a contactor contacting the resistive substrate, wherein the resistive substrate and the contactor include a conductive film positioned therebetween and coated with a conductive material, such that the contactor and the resistive substrate are connected to each other by the conductive film. With the fuel amount measuring device, abrasion of the resistive substrate is prevented, thereby making it possible to improve durability of the fuel amount measuring device.

Abstract: A system for providing a catalyst to a first flow of gas. The first flow of gas has an operating pressure for transporting the first flow of gas to a provided combustion chamber. The operating pressure established by a compressor of a provided turbocharger. The system includes a pump and an atomizer. The pump receives a portion of the first flow of gas. The atomizer receives a solution comprising the catalyst and provides a vapor comprising the catalyst. The pump provides the portion of the first flow of gas at a second pressure greater than the operating pressure. The portion of the first flow of gas at the second pressure carries the vapor out of the system and into the first flow of gas for delivery to the combustion chamber.

Abstract: A method of predicting sheet formability at a microscale level includes the steps of providing a grid pattern on a test sheet, bulging the test sheet to a hemispherical shape until a crack is initiated on the surface of the test sheet, detecting the initiation of the crack, acquiring two images of the surface adjacent to the crack and calculating surface strains on the test sheet.

Abstract: The invention relates to a device and a method for the contactless capacitive filling level measurement of a filling medium in a container, the device having a plurality of measurement electrodes and at least one reference electrode.

Abstract: A sensor apparatus measures wet-bulb temperature. The sensor apparatus comprises a casing. A measuring device comprises a sock at its probe end. A washing unit having a fluid outlet in the casing projects a fluid on the sock to remove residue and to humidify the sock. An actuator displaces the measuring device between a washing position and a measuring position. In the washing position, the sock is in register with the washing unit in the casing. In the measuring position, the measuring device has the sock out of the casing and away from the washing unit to measure an ambient wet-bulb temperature. A method for measuring a wet-bulb temperature is also provided.

Abstract: A method for predicting initial unbalance in a component comprising one or more elements, the method comprising: defining a statistical distribution of a mass moment weight of each of the one or more elements; restricting the statistical distribution to a selected range; and calculating an initial unbalance of the component for the restricted distribution of the one or more elements.

Abstract: The present invention proposes a single-axis-control-input gyroscope system having imperfection compensation, which comprises a gyroscope and a state observer. The gyroscope includes a mechanical structure, and the dynamic behavior of the mechanical structure is described with a plurality of system parameters and a plurality of dynamic equations. The system parameters include a mass of the gyroscope, two main-axis spring constants, a cross-axis spring constant, two main-axis damping coefficients, a cross-axis damping coefficient and an angular velocity. The mechanical imperfections cause the system parameters to deviate from the designed values and become unknown values. The gyroscope receives a single-axis control signal and outputs a plurality of gyroscopic system dynamics. The single-axis control signal includes at least two frequency signals. The state observer is coupled to the gyroscope to receive the gyroscopic system dynamics as the inputs thereof to feed back compensations to the state observer.

Abstract: Disclosed is a gyroscope sensor circuit, including a first differential amplifier differentially amplifying signals outputted from first sensing nodes of a gyroscope sensor; a phase shifter shifting a signal from the first differential amplifier by a predetermined shift phase; an amplitude detector detecting the amplitude magnitude of the signal from the first differential amplifier; and a variable gain amplifier amplifying the shifted signal from the phase shifter with gain adjusted depending on the amplitude magnitude from the amplitude detector, and providing the amplified signal to driving nodes of the gyroscope sensor.

Abstract: A yaw rate sensor having a substrate and a seismic mass is described, in which the seismic mass is excitable to a working oscillation relative to the substrate via a drive unit, and a Coriolis deflection of the seismic mass is detectable relative to the substrate, in which the yaw rate sensor furthermore has an interrupt interface, the drive unit being configured to reduce a frequency and/or an amplitude of the working oscillation if an interrupt signal is present at the interrupt interface.

Abstract: A tunneling accelerometer includes a proof mass that moves laterally with respect to a cap wafer. Either the proof mass or the cap wafer includes a plurality of tunneling tips such that the remaining one of proof mass and the cap wafer includes a corresponding plurality of counter electrodes. The tunneling current flowing between the tunneling tips and the counter electrodes will thus vary as the proof mass laterally displaces in response to an applied acceleration.

Abstract: An acoustic oscillator arrangement includes an acoustic system having at least one acoustic transmission path through it, and at least one mode. The acoustic transmission path is of variable length. A controller is provided with an amplifier and a feedback network which together provide a positive feedback oscillator for exciting a mode of the acoustic system. The feedback network comprises a non linear amplitude control element (N-LACE), a frequency dependent gain element with an electronic transfer function, and a phase compensator. The acoustic oscillator arrangement also includes an acoustic transmitter which launches an acoustic signal into the acoustic system based upon an output from the controller, and an acoustic receiver which receives an acoustic signal from the acoustic system which is fed back to the controller.

Abstract: Methods and apparatus for exciting a structure and determining its structural integrity. In particular, methods of nonlinear analysis are used to compare first and second response datasets, each dataset resulting from a different excitation amplitude that the other dataset.

Abstract: Provided is a method and device for low frequency vibration excitation, which may generate a low frequency using a plurality of ultrasonic generators for high frequency. The method generates ultrasonic waves using a plurality of ultrasonic generators attached to a target structure to induce a beat phenomenon, and extract a frequency lower than a frequency of each of the plurality of the ultrasonic generators to measure a property of the target structure, and thereby may be freely applied to a target structure, regardless of a shape of the target structure such as a plate, a curved pipe, and the like, using a relatively small-sized ultrasonic sensor for high frequency, and may excite a specific frequency of an acceleration range, so that the ultrasonic excitation method may be applicable in a relatively poor Signal-to-Noise Ratio (SNR) range.

Abstract: Provided is a method and device for low frequency vibration excitation, which may generate a low frequency using a plurality of ultrasonic generators for high frequency. The method generates ultrasonic waves using a plurality of ultrasonic generators attached to a target structure to induce a beat phenomenon, and extract a frequency lower than a frequency of each of the plurality of the ultrasonic generators to measure a property of the target structure, and thereby may be freely applied to a target structure, regardless of a shape of the target structure such as a plate, a curved pipe, and the like, using a relatively small-sized ultrasonic sensor for high frequency, and may excite a specific frequency of an acceleration range, so that the ultrasonic excitation method may be applicable in a relatively poor Signal-to-Noise Ratio (SNR) range.

Abstract: A pipe inner surface inspection apparatus that can accurately inspect the inlet portion of a pipe is provided.

Abstract: Ultrasonic waveguides having improved velocity gain are disclosed for use in ultrasonic medical devices. Specifically, the ultrasonic waveguides comprises a first material having a higher acoustic impedance and a second material having a lower acoustic impedance.

Abstract: A device includes a substrate 5, an emission source 1 emitting an acoustic beam from the first surface 7 of the substrate 5 towards the second surface 6 of the substrate 5, first reflection element 11 arranged so that, after reflection, the beam has a propagation direction substantially parallel to the second surface 6 and through a study area 3, and second reflection element 12 for reflecting the beam after crossing the study area 3 in the direction of the first surface, towards a receiver 10. The device is useful in the field of bioMEMS and labs-on-a-chip, and in particular makes it possible to leave one of the surfaces of the substrate free, for example for observation of the study area in parallel by element of an optical microscope. Moreover, the device facilitates the production of elements for the focussing or divergence (lenses) or reflection (mirror) of the acoustic beam.

Abstract: An imaging apparatus for generating photoacoustic images and ultrasound images that is capable of generating both types of images with high resolution is provided. An ultrasound probe includes a plurality of probe elements. A first phase matching adding section reads out photoacoustic signals from a photoacoustic element data memory, and administers phase matching addition within a first phase matching range. An image processing section generates a photoacoustic image based on phase matched and added data. A second phase matching adding section administers phase matching addition on reflected acoustic signals sampled by a signal obtaining section within a second phase matching range. An image processing section generates an ultrasound image based on phase matched and added data. The first phase matching range is greater than the second phase matching range.

Abstract: Disclosed is a wireless self-powered monolithic integrated capacitive sensor, as well as methods of manufacturing same. A single monolithic chip may include various technologies, including RF MEMS, CMOS devices and related circuitry, and physical sensor MEMS. An example pressure sensor is disclosed, including a sensing capacitor and a reference capacitor that together allow the system to provide steady output in various environmental conditions. In one embodiment a pre-fabricated circuit wafer is fusion bonded to a pre-fabricated diaphragm wafer. Doped silicon may form the monolithic structure to provide the voltage necessary to run the system.

Abstract: A pressure guiding bump is configured on the center of a pressure gauge to obtain a single “conductivity-pressure” curve feature which is independent from any position wherever a pressure is applied on the guiding bump. When a pressure is applied, the guiding bump guides the pressure against a fixed deformable area to be deformed, whatever the pressure is, the deformed area is nearly a same area. The pressure gauge is extraordinarily adequate to be designed in a weighing machine with parallel connection in between them.

Abstract: A floating element shear sensor and method for fabricating the same are provided. According to an embodiment, a microelectromechanical systems (MEMS)-based capacitive floating element shear stress sensor is provided that can achieve time-resolved turbulence measurement. In one embodiment, a differential capacitive transduction scheme is used for shear stress measurement. The floating element structure for the differential capacitive transduction scheme incorporates inter digitated comb fingers forming differential capacitors, which provide electrical output proportional to the floating element deflection.

Abstract: An apparatus for testing the ability of a material or component to deflect comprises a table on which a component or workpiece made of the material is mounted. The workpiece is mounted using a suitable holding and supportive device. The supportive device includes a fulcrum on which the workpiece is partially supported. A loading device is used to apply a load to the workpiece. A computer or PLC in operable communication with the loading device is used to operate the apparatus and assess the ability of the material of the workpiece to deflect. A process used to assess the testing of a material comprises the steps of deflecting a workpiece of the material and measuring at least one of a force used to deflect the workpiece and a distance the workpiece is deflected.

Abstract: A biaxial tensile testing machine performing a tensile test of a test piece by stretching the test piece in four directions along two axes perpendicular to each other includes: first and second turntables which are disposed so as to be parallel to each other and relatively rotatable about a rotary axis along the planer direction thereof; first to fourth link mechanisms which are provided at 90° intervals in the circumferential direction about the rotary axis so that one ends of respective members of a pair of members are rotatably connected to each other, and the other ends of respective members of the pair of members are attached across the first and second turntables; and first to fourth test piece holding units which are respectively attached to the first to fourth link mechanisms and hold the test piece.

Abstract: A tester for testing a shear fastener includes: a frame; a stationary chuck connected to the frame; a linear guide comprising a slider; a movable chuck connected to the slider; a movable insert fastened to the movable chuck and having a hole for receiving a first portion of the shear fastener; a stationary insert fastened to the stationary chuck and having a hole for receiving a second portion of the shear fastener; a linear actuator for engaging the movable chuck and fracturing the shear fastener; and a load cell for determining force exerted on the shear fastener by the linear actuator.

Abstract: The present invention provides an apparatus and method for non-destructive measurement of bending stiffness of a gas diffusion layer (GDL) for a fuel cell by measuring a sagging length of a GDL sample, which can be used for a fuel cell, without damaging or destroying the GDL sample.

Abstract: A method for monitoring and/or measuring an, at least at times, two-phase medium flowing in a pipeline, and having a first phase, especially a gaseous first phase, with a first density and a second phase, especially a liquid second phase, having a second density different from the first density. The method is performed with a vortex flow measuring device, which has at least one measuring tube inserted into the pipeline, a bluff body and a vortex sensor. In such case, the vortex sensor includes a sensitive section that responds to pressure fluctuations, and that is arranged at least partially adjoining the wall of the measuring tube.