The sensor assembly (11) comprises: a bowl shaped, namely at least sectionally dished, membrane (111), with a curved surface (111+) and an oppositely lying surface (111#); and a sensor blade (12) extending from the surface (111+) of the membrane. The membrane (11) is so formed that at least one region of the surface (111+) adjoining the sensor blade is convex. A sensor formed by means of such a sensor assembly and by means of a transducer element (12) 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, respectively 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 method and device for determining a velocity of a flowing medium that allows an as high as possible measuring accuracy without requiring a complicated measuring construction is achieved in that a vortex is generated in the medium and an electromagnetic signal is emitted into the medium. Then, the permittivity of the medium is determined and the velocity of the medium is determined using the permittivity measurement.

The present invention is a water use and/or a water energy use monitoring apparatus that is affixed to the hot and cold water supply piping for continuously (or on demand) monitoring displaying the water and water energy (hot vs. ambient) use within a residential or commercial building. The water use monitor apparatus includes a power generation, a microprocessor, temperature and water flow sensors, optional water quality sensors, timing circuits, wireless circuitry, and a display means. A wired or wireless means is designed to electronically communicate water use, water energy use and/or water quality information to a remotely located display apparatus or typical cell phone, smart phones, or similar apparatus for convenient observation by a commercial, operator or occupier, resident, municipal or government agency.

A vortex flow transducer for measuring the flow velocity of a fluid flowing in a measuring tube as well as to a vortex flow sensor for the vortex flow transducer. In such case, the vortex flow sensor includes a housing having a central axis and a connecting section, on which a shoulder is embodied, which has a bearing area. In a plane of the shoulder a membrane is arranged, whose edge is positioned over the bearing area and is axially spaced therefrom. The vortex flow sensor includes, furthermore, a flange shaped support system having a radial edge section and a cylindrical axial section, wherein the radial edge section lies with its surface against the shoulder of the platform and the cylindrical axial section extends parallel to the central axis, so that the membrane is supported against the support system upon application of a predetermined pressure on the membrane.

Vortex sensor amplitude information may be used to validate that a vortex signal being measured corresponds to an actual fluid flow and is not noise. The estimated amplitude of a sinusoidal vortex signal is used as a secondary means to determine the fluid flow based on vortex sensor characteristics. The original amplitude of the sinusoidal vortex signal is determined from a clipped voltage amplitude sinusoidal signal. The estimated velocity of the fluid in a pipe based on the original amplitude of the sinusoidal vortex signal is compared to the measured velocity of the fluid based on vortex velocity frequency. If the two determined velocities do not reasonably agree, the measured vortex signal is not a valid flow signal and adaptive filters are adjusted to reduce the effects of noise.

Provided is a diagnostic apparatus, including a diagnostic unit configured to diagnose a condition of a vortex flowmeter using a determination result of a magnitude of a signal component of each of at least one target detection signal among the at least one detection signal detected by the vortex flowmeter having a vortex generator and a detection unit configured to detect at least one detection signal according to a vortex generated by the vortex generator, or a magnitude of a signal component of at least one of combined signals configured to linearly combine two or more of the at least one detection signal.

A flow meter for measuring the flow velocity of a fluid includes a measurement tube that is axially bounded by at least one flange end and that forms a measurement space that can be flowed through by the fluid. At least one baffle is provided for generating interference in the flow, wherein the baffle is arranged in the measurement space. A detector for detecting the interference is arranged downstream of the baffle. An insertion element is introduced into the measurement tube and has a base portion. The base portion is arranged in the flange end. The insertion element has brackets that adjoin the base portion and that project into the measurement space, with the baffle being formed and its position in the measurement space being held between the brackets.

A field device includes: a casing portion that has an amplifier shield chamber into which an analog signal transfer portion transferring an analog signal output from a detector is able to be inserted; a signal conversion portion that is disposed inside the amplifier shield chamber, the signal conversion portion being configured to convert the analog signal into a digital signal; and a first connector that is disposed inside the amplifier shield chamber, the first connector being configured to connect the analog signal transfer portion and the signal conversion portion to each other in an attachable/detachable manner.

A field device case is a metal field device case where a lead-in part for drawing a cable including an outer shield is provided on a tubular circumferential wall. The field device case includes: a first inner surface which is formed away from an opening end surface of the field device case in an axial direction orthogonal to the opening end surface; a second inner surface which is formed farther away from the opening end surface than the first inner surface in the axial direction; and a cable fixing member which is fixed to the first inner surface and allows the outer shield of the cable drawn by the lead-in part to be in contact with the second inner surface.

Maximum flow setting. A method of limiting flow through a valve (1) comprising: reading a time series of signals from a flow sensor (5a, 5b); producing a time series of flow rates from the time series of signals; producing an averaged series of values; producing a first bounded series of values by replacing values that are below a lower threshold (13) with the lower threshold (13); producing a second bounded series of values by replacing values that exceed an upper threshold (15) with values that equal the upper threshold (15); producing a maximum flow rate by applying a moving maximum filter (17) to the second bounded series; reading a set point signal (9); limiting the set point signal (9) to the maximum flow rate; producing an actuation signal from the limited set point signal; transmitting the actuation signal to an actuator (7).