Abstract: A measuring sensor includes a housing in which an acceleration sensor is arranged and in which a circuit board is retained with a sensor electronics arranged thereon and a mounting element functions to secure the measuring sensor to a test object, wherein the acceleration sensor is mechanically rigidly coupled to the mounting element and connected to the sensor electronics via a flexible line connection, where in order to optimize the coupling of the acceleration sensor to the test object to be monitored, in terms of detecting oscillations, vibrations or structure-borne noise, the acceleration sensor is directly connected to the mounting element without mechanical contact with the housing, and the housing is retained elastically on the mounting element and supported by the mounting element.

Abstract: A pressure sensor assembly includes a tube, wherein a membrane to which the pressure to be measured is applied is arranged in the cross-section of the tube, where the membrane has a high flexural rigidity in a central region and is mounted resiliently in the edge region in the tube via two limbs, and includes a device for detecting the axial displacement which is easily accessible from the outside on the outer side of the tube and is advantageously not in contact with the process medium, and where the pressure sensor assembly has a particularly simple structural configuration, and can be used advantageously in measurement transducers for process instrumentation.

Abstract: A pressure sensor assembly includes a tube, wherein a membrane to which the pressure to be measured is applied is arranged in the cross-section of the tube, where the membrane has a high flexural rigidity in a central region and is mounted resiliently in the edge region in the tube via two limbs, and includes a device for detecting the axial displacement which is easily accessible from the outside on the outer side of the tube and is advantageously not in contact with the process medium, and where the pressure sensor assembly has a particularly simple structural configuration, and can be used advantageously in measurement transducers for process instrumentation.

Abstract: A flow measurement arrangement and measuring transmitter for process instrumentation that includes the flow measurement arrangement, wherein the flow measurement arrangement operating in accordance with the differential-pressure method includes a tube and an elastically deformable measuring diaphragm (orifice plate) arranged in the cross section of the tube and a strain sensor that detects the deformation and converts it into an electric signal, where the measuring diaphragm (orifice plate) and the tube are formed in one piece from uniform material, and where both side of the measuring diaphragm (orifice plate) each pass into the tube via a fillet groove and the at least one strain sensor is arranged on the circumferential side of the tube opposite the fillet groove.

Abstract: An ultrasonic liquid level detector includes clamp-on transducers for a liquid level measurement by the clamp-on transducers instead of insertion type transducers. The ultrasonic liquid level detector measures a height of a liquid-liquid interface or a gas-liquid interface based on an acoustic attenuation of an acoustic pulse or a transit-time of the acoustic pulse using a pulse echo technique or a combination thereof.

Abstract: A method for operating a Coriolis mass flow rate meter and a Coriolis mass flow rate meter including an evaluation device, a measuring tube having a medium flowing therethrough and which is excited so as to perform oscillations, and at least two spaced oscillation pickups spaced apart in the longitudinal direction of the measuring tube to each generate an oscillation signal, wherein a first indicator variable based on the damping of the oscillations of the measuring tube is initially used to detect deposits in the measuring tube and if, based on the first indicator variable, increased damping is established, a second indicator variable is used, which is based on the manifestation of harmonics in the frequency spectrum of an oscillation signal such that reliable detection of deposits and therefore an indication of the state of meters and pipelines in a process engineering installation are advantageously possible.

Abstract: A method for operating a Coriolis mass flow rate meter and a Coriolis mass flow rate meter including an evaluation device, a measuring tube having a medium flowing therethrough and which is excited so as to perform oscillations, and at least two spaced oscillation pickups spaced apart in the longitudinal direction of the measuring tube to each generate an oscillation signal, wherein a first indicator variable based on the damping of the oscillations of the measuring tube is initially used to detect deposits in the measuring tube and if, based on the first indicator variable, increased damping is established, a second indicator variable is used, which is based on the manifestation of harmonics in the frequency spectrum of an oscillation signal such that reliable detection of deposits and therefore an indication of the state of meters and pipelines in a process engineering installation are advantageously possible.

Abstract: A diagnostic system and method for a valve, especially a check valve of a positive displacement pump, including at least one solid-borne sound sensor is provided. A first value of a parameter of a sound signal recorded in the closed state of the valve and a second value of a parameter of a sound signal recorded in the open state of a valve are determined essentially. A signal indicating a disturbance is issued if the deviation between the first value and the second value exceeds a predefined threshold value, resulting in particularly good insensitivity.

Abstract: An acoustic pick-up, particularly an ultrasonic pick-up for acoustically diagnosing machines, for example, for detecting leakage in valves or for diagnosing positions, comprising a piezoelectric measuring element and an electronic circuit that processes the measurement signal into a form that is suited for transmission to an evaluation device. In order that the acoustic pick-up can function without an external auxiliary power supply, means are provided by means of which auxiliary power required for operating the electronic circuit can be generated from the acoustic signal to be picked up.

Abstract: A diagnostic system and method for a valve, especially a check valve of a positive displacement pump, including at least one solid-borne sound sensor is provided. A first value of a parameter of a sound signal recorded in the closed state of the valve and a second value of a parameter of a sound signal recorded in the open state of a valve are determined essentially. A signal indicating a disturbance is issued if the deviation between the first value and the second value exceeds a predefined threshold value, resulting in particularly good insensitivity.

Abstract: An acoustic pick-up, particularly an ultrasonic pick-up for acoustically diagnosing machines, for example, for detecting leakage in valves or for diagnosing positions, comprising a piezoelectric measuring element and an electronic circuit that processes the measurement signal into a form that is suited for transmission to an evaluation device. In order that the acoustic pick-up can function without an external auxiliary power supply, means are provided by means of which auxiliary power required for operating the electronic circuit can be generated from the acoustic signal to be picked up.

Abstract: A diagnostic system, for a valve (2), having a sensor (12) that senses structure-borne noise and having a device (14) for evaluating a measurement signal (13) of the structure-borne noise. During a calibration process, a first progression of the measurement signal is sensed for the closed position of the valve (2) and a first value (w1) of a characteristic is determined. To simulate leakage noise, the valve (2) is nearly closed during operation, a second progression of the measurement signal is sensed and a second value (w2) is determined. If the deviation of the second value from the first value is sufficiently large, a diagnosis is possible. A third progression of the measurement signal is sensed for the closed position of the valve as in an installed condition, and a third value (w3) is determined. If the deviation of the third value (w3) from the first value (w1) is too great, and if a diagnosis has been identified as being possible, then the system deduces that the valve leaks.

Abstract: A diagnostic system, for a valve (2), having a sensor (12) that senses structure-borne noise and having a device (14) for evaluating a measurement signal (13) of the structure-borne noise. During a calibration process, a first progression of the measurement signal is sensed for the closed position of the valve (2) and a first value (w1) of a characteristic is determined. To simulate leakage noise, the valve (2) is nearly closed during operation, a second progression of the measurement signal is sensed and a second value (w2) is determined. If the deviation of the second value from the first value is sufficiently large, a diagnosis is possible. A third progression of the measurement signal is sensed for the closed position of the valve as in an installed condition, and a third value (w3) is determined. If the deviation of the third value (w3) from the first value (w1) is too great, and if a diagnosis has been identified as being possible, then the system deduces that the valve leaks.