To provide a flow sensor having improved responsiveness compared to the prior art, the flow sensor of the present invention includes an insulation board, a flow-rate detection resistance element, and a temperature compensation resistance element. Each of the flow-rate detection resistance element and the temperature compensation resistance element is arranged on the insulation board such that a terminal temperature of the temperature compensation resistance element approaches a terminal temperature of the flow-rate detection resistance element. Accordingly, responsiveness can be improved.

A flow computing apparatus includes: a first computation controller; a second computation controller; and an access controller, wherein the first computation controller: computes a flow rate of a fluid from sensor data indicating a state of the fluid; and generates transaction information indicating the flow rate of the fluid, the second computation controller computes a management index related to supply of the fluid based on at least a part of the sensor data or index values computed during the computation of the flow rate of the fluid by the first computation controller, and the access controller restricts at least a change in a function of the first computation controller.

A cleansing system for improving operation of a petrochemical plant or refinery. The petrochemical plant or refinery may include a fractionation column, a condenser, and a pump. Equipment, such as condensers, receivers, reboilers, feed exchangers, and pumps may be divided into subsections. Temperatures, pressures, flows, and other plant operations may be used for optimizing plant performance. A cleansing unit performs an enhanced cleansing process, which may allow early detection and diagnosis of the plant operating conditions based on one or more environmental factors.

A magneto-inductive flow measuring device is disclosed that includes a measuring tube with a measuring tube axis and two measuring electrodes arranged diametrally opposite one another on the measuring tube and from which a signal is tapped for ascertaining a flow. The flow measuring device includes four other electrodes in pairs arranged diametrally opposite one another on the measuring tube, forming second and third electrode axes that intersect the measuring tube axis, where the two electrode axes are arranged offset from a parallel projection of the first electrode axis onto the second cross-sectional plane by a clockwise or counterclockwise angular measure. The flow measuring device further includes an evaluation unit for detecting a flow profile based on measurement signals tapped from the electrodes of the two electrode axes. A further aspect of the disclosure includes a method for compensating a flow profile related measurement error in a flow measurement.

A measuring instrument disposed on a pipe through which a liquid flows includes two ultrasonic vibrators disposed on an upstream side and a downstream side of the pipe, and an ultrasonic conductor disposed between the ultrasonic vibrators and held in contact with the liquid. The measuring instrument derives the temperature of the liquid in contact with the ultrasonic conductor by generating ultrasonic waves from one of the ultrasonic vibrators and observing the ultrasonic waves propagated through the ultrasonic conductor with the other of the ultrasonic vibrators.

A mass flow control system can be self verified for its accuracy when controlling a flow to a process. The system comprises: a control valve for controlling the flow of fluid through the system as a function of a control signal; a controller for generating the control signal as a function of measured flow of fluid through the system and a targeted flow set point; a pressure sensor for measuring the controlling fluid pressure for use in measuring and verifying the flow rate; and a source of fluid for providing a known volume of fluid for use in verifying the system accuracy anytime between steps of the flow control process.

The invention relates to a sensor arrangement on a process installation comprising at least two sensor tiles, wherein each sensor tile comprises a support which can be arranged on the process installation and a plurality of sensors arranged on the support for determining a physical or chemical variable of a measuring medium found in the process installation, a process characteristic of the measuring medium and/or a state of the process installation, wherein a first of the sensor tiles comprises a control and/or evaluation unit having at least one transmit and receive module for data exchange with a first control and/or evaluation unit of a second sensor tile, wherein the first control and/or evaluation unit of the first sensor tile and/or a second control and/or evaluation unit allocated to the sensor arrangement is designed to determine the physical or chemical variable of the measuring medium, the process characteristic of the measuring medium and/or a state of the process installation by weighting the values determined by each sensor tile, wherein weighting is carried out as a function of the measured value variations of at least one sensor of a sensor tile, the position of the sensor tile in the process installation and/or the function of the sensor tile.

A flow sensor includes a flow tube in a form of a tube and a support cast around the flow tube. The support clamps the flow tube and the flow tube extends through the support. The flow sensor is formed by placing the flow tube in a tube cavity of a casting mold and pouring or injecting a liquid resin into a support cavity of the casting mold. The support is formed around the flow tube from solidifying the liquid resin in the support cavity of the casting mold. A temperature of the casting mold during formation of the support does not exceed a threshold temperature to avoid deformation of the flow tube. The flow sensor can also include at least one memory chip that stores calibration information associated with the flow sensor and connectors that allows a controller to read the calibration information from the memory chip.

An apparatus for monitoring at least one physical or chemical process variable, comprising at least one measurement branch and a compensation branch connected in parallel therewith for compensating the influence of at least one environmental parameter on the process variable and/or on the measuring of the process variable. The measurement branch includes at least one primary sensor unit and a primary electronics unit for signal registration, evaluation, and/or feeding. The compensation branch includes at least a secondary sensor unit and a secondary electronics unit. The secondary sensor unit is so embodied that it registers a physical or chemical variable characteristic for the at least one environmental parameter, wherein the secondary electronics unit is so embodied that it draws the required energy from the measurement branch, and that it produces from the characteristic physical or chemical variable a compensation signal, which it transmits to the primary electronics unit of the measuring branch.

A flow meter for a fluid with a pulsating flow includes a piezo transducer for receiving and converting fluid pulses into electrical pulses, a AC/DC converter circuit for cumulatively storing the pulse energies of the electrical pulses in an energy store, a counter for counting the electrical pulses during a time interval, an evaluation device for determining a pulse parameter indicative of the flow rate of at least one of the electrical pulses and for determining a flow value based on the electrical pulses counted within the time interval and the determined pulse parameter, a communication device for the preferably wireless transmission of the determined flow value and a power supply device for the exclusive power supply of the flow meter with the energy stored in the energy store.