Abstract: A fluid flow obstruction device for a process fluid flow measurement device includes a first wall having a first side. A second wall having a proximate end is arranged at a proximate end of the first side of the first wall. The arrangement forms a first apex between the first wall and the second wall. At least one additional wall is arranged parallel to the second wall at a distance from the proximate end of the first side of the first wall. The arrangement of the at least one additional wall and the first wall forms a corresponding additional apex.

Abstract: A flow meter includes a cylindrical body having an exterior surface and an interior surface defining an inner diameter of the cylindrical body. The cylindrical body also includes an outlet end and an inlet end. The inlet end is shaped and dimensioned for selective attachment to an inlet pipe or hose having an inner diameter that is small than the inner diameter of the cylindrical body. The flow meter also includes a gauge tap formed within the cylindrical body, the gauge tap being positioned adjacent the outlet end of the cylindrical body at a position between the outlet end and the inlet end. A pressure gauge is secured within the gauge tap for measuring the pressure within the cylindrical body and ultimately the flow of fluid through the cylindrical body. A nozzle is attached at the outlet end of the cylindrical body and at least one nozzle insert is provided for selective attachment to the nozzle so as reduce the size of the outlet in order to extend the normal range of the flow meter.

Abstract: A fluid flow restrictor device for controlling fluid flow at a connection between ducts may include a restrictor device body that is partially or fully inserted into and disposed within one of the ducts and an outboard restrictor device flange extending radially outward at an outboard end of the restrictor device body and having an outboard flange outer diameter that is greater than an inner diameter of the ducts so that the restrictor device body or the outboard restrictor device flange is engaged by an open end surface of the duct to prevent full insertion of the fluid flow restrictor device into the duct. A body inner surface defines a restrictor opening through the restrictor device body that can be varied to achieve desired fluid flow characteristics at the connection.

Abstract: A measurement system (20) includes pressure measurement apparatuses (220, 221, 222) capable of measuring pressure. The pressure measurement apparatuses (220, 221, 222) measure pressure at a measurement timing designated by a trigger signal.

Abstract: A device and method for the visual inspection of the existence of pressure within a branch line of pipe is described. A mechanical tee includes a collar portion configured to extend around a pipe. The collar portion defines an axis and includes one or more fasteners to secure the tee to the pipe. A neck portion is coupled to the collar portion. The channel of the neck portion is in fluid communication with the interior of the pipe. A seal is used to prevent leakage between the pipe and the mechanical tee. A pressure indicating device is in fluid communication with the channel of the neck portion and configured to provide a visual indication of the pressure level in the channel. The pressure indicating device may optionally include electrical contacts to communicate with a monitoring system to discern and track the pressure levels in the channel.

Abstract: A micro electrical mechanical system (MEMS) valve is provided. The MEMS valve includes first and second bodies, a medium and a thermal element. The first body defines a first channel and a second channel intersecting the first channel. The second body defines a third channel and is movable within the first channel between first and second positions. When the second body is at the first positions, the second and third channels align and permit flow through the second and third channels. When the second body is at the second positions, the second and third channels misalign and inhibit flow through the second channel. The medium is charged into the first channel at opposite sides of the second body. The thermal element is proximate to the first channel and is operable to cause the medium to drive movements of the second body to the first or the second positions.

Abstract: A fluid flow sensor is provided that includes a flow sensor cartridge that is insertable within the fluid flow sensor and that provides greatly enhanced repeatability for the movement of the flow element without undesired engagement of the flow element with the flow body. The cartridge includes a saddle carrier and frame structure that forms a housing for the flow element to enable the flow element to be consistently positioned within the cartridge during manufacture. The flow element cartridge also includes non-uniform fulcrums to enable different but repeatable flexing properties for the flow element within the flow body and non-vertical hinge geometries that reduce stress on the flow element when bending, thereby increasing the useful life of the flow element and fluid flow sensor. The cartridge can also include an over-molded connection between the cartridge and the pressure measurement tubes to provide elastic strain relief on the tubes connected to the cartridge.

Abstract: A gas, whose flow rate is adjusted by a flow rate controller as a measurement target, is supplied into a processing vessel in a state that a third valve of the gas supply system provided at an upstream side of the processing vessel is opened. While the gas is continuously supplied, the third valve is closed after a pressure measurement value of a pressure gauge within a flow rate controller for pressure measurement is stabilized. After the third valve is closed, an output flow rate of the flow rate controller as the measurement target is calculated from a previously known volume of the gas supply system in which the gas supplied through the flow rate controller as the measurement target is collected and a rise rate of the pressure measurement value of the pressure gauge within the flow rate controller for pressure measurement with respect to time.

Abstract: A heating, ventilation, or air conditioning (HVAC) system with automated flow direction detection is provided. The HVAC system includes one or more hoses configured to provide airflow from HVAC equipment, a bidirectional pressure sensor coupled to the hoses, and a controller coupled to the bidirectional pressure sensor. The controller is configured to receive a signal from the bidirectional pressure sensor, determine a direction of the airflow relative to the bidirectional pressure sensor based on the signal, correct the signal for a reversed hose polarity relative to the bidirectional sensor based on the direction of the airflow, and perform a control activity using the corrected signal.

Abstract: The present disclosure relates to a removable orifice plate device which has an orifice plate having a circular portion with an aperture therein, and a graspable end portion extending therefrom. A tee body is included which has oppositely extending first and second tee runs and a tee branch. The tee runs are coupled to gas inflow and outflow pipes. The tee body has internal structure forming a slot which is aligned with an opening formed by the tee branch, and which receives the circular portion of the orifice plate. The orifice plate, when installed in the slot in the tee body, thus allows a flow of fluid only through the aperture. A removable cover encloses the orifice plate within the tee body.

Abstract: A differential pressure fluid flow meter element for insertion between the connecting flanges of conduit sections of a fluid carrying conduit includes a flat orifice plate having a fluid contacting region for positioning in a flow of fluid through the conduit and a handle extending outward from an outer portion of the fluid contacting region. The flat orifice plate includes at least one pressure port formed in the fluid contacting region of the plate, and at least one impulse line channel formed in the flat orifice plate and extending from one of the at least one pressure port through the handle to a corresponding transmitter interface port. A plurality of apertures formed in the handle and disposed and arranged relative to the at least one transmitter interface port allow mounting of the process variable transmitter directly to the paddle style orifice plate handle, with the transmitter substantially perpendicular to a plane of the handle.

Abstract: Computerized methods and systems for determining flow direction relative to a bidirectional pressure sensor are provided. The method includes receiving pressure information from the bidirectional pressure sensor. The method includes using the pressure information to evaluate, at a processing circuit, pressure at the bidirectional pressure sensor over time, The method includes assigning a flow direction to a current pressure of the bidirectional pressure sensor by comparing the current pressure to at least one past pressure.

Abstract: A heat management system of a gas turbine engine for cooling oil and heating fuel, includes an oil circuit having parallel connected first and second branches. The first branch includes a fuel/oil heat exchanger and a first fixed restrictor in series and the second branch includes an air cooled oil cooler and a second fixed restrictor. The first and second fixed restrictors limit respective oil flows through the first and second branch differently, in response to viscosity changes of the oil caused by temperature changes of the oil during engine operation to modify oil distribution between the first and second branches.

Abstract: A process flow device that includes a self-averaging orifice plate type of primary flow element with a high pressure tap located on or incorporated into its upstream surface, and a low pressure tap located on or incorporated into its downstream surface, for measuring, by a differential pressure process, the volumetric rate of fluid flow at a point in a fluid carrying conduit where the velocity profile of the fluid is asymmetric with respect to the longitudinal axis of the conduit. The improved pressure tap configuration consists of two fluid conduits, one carried by each of the downstream and upstream faces of the orifice plate, establishing fluid communication between openings in the downstream and upstream faces of the orifice plate and their respective terminal pressure ports.

Abstract: An apparatus for measuring flow of a process fluid includes an elongate spool providing a spool conduit therethrough adapted to be coupled in line with process piping to receive the flow of process fluid. A meter body is carried by the elongate spool and receives the spool conduit therethrough. The meter body includes a flow measurement component opening which extends from the spool conduit to outside of the meter body. A flow component is configured for placement in the flow measurement component opening of the meter body. A carrier is configured to removably mount to the meter body and couple the flow measurement component to the spool conduit through the flow measurement component opening. A flow measurement transmitter couples to the flow measurement component to measure the flow of process fluid based upon an interaction between the process fluid and the flow measurement component.

Abstract: The invention relates to a device for measuring the differential pressure in a flowing fluid, comprising a housing (3) having two coaxial openings (7, 8) and an inner space (29), which inner space can be accessed by the or the at least one of the openings (7, 8), a measuring nozzle that is arranged in the housing (3) and that has a flow channel (22) comprising a cross-sectional constriction (23), a differential pressure sensor (39) comprising two measuring inlets (40, 42), by means of which differential pressure sensor a difference between pressures at the measuring inlets (40, 42) can be measured, wherein a first of the measuring inlets (40) is in connection with the flow channel (22) and a second of the measuring inlets (42) is in connection outside of the measuring nozzle with the inner space (29), and a shut-off body (12) that comprises the measuring nozzle and that is rotatably mounted in the housing (3) about a rotation axis, which shut-off body in a first rotational angle position connects the flow cha

Abstract: A flow system based on pulsating mechanism that has better accuracy compared to conventional vortex meters due to the fact that the pulsations generated have increased signal response and lower frequency, both of which are favorable for a high accuracy measurement. Certain embodiments include a housing, a bluff body, an orifice plate, and means for detecting a pulsating frequency of pulsating flow and determining the fluid flow rate based on the detected pulsating frequency. In certain embodiments, the housing can include an outer shell, an inlet, and an outlet.

Abstract: A valve includes a body having upstream and downstream ports to measure upstream and downstream pressures and configured on a common axis, and a ball arranged in the body to rotate re the common axis between open and closed positions to allow for fluid flow and no fluid flow. The ball has a calibrated member having a calibrated orifice to allow fluid flow and has a flow coefficient and upstream and downstream pressure taps located upstream and downstream of the calibrated orifice and in fluidic communication with the upstream and downstream ports to measure upstream and downstream pressures when in the open position and angled re the common axis, so a direct flow measurement of fluid flow is determined based on a measured pressure differential between upstream and downstream pressure taps re the flow coefficient of the calibrated orifice when in the open position.

Abstract: A method for determining the flow rates of a fluid comprising a multi-component mixture of a gas and at least one liquid in a pipe, the method comprising the following steps: a. the permittivity of the multi-component mixture is determined based on an electromagnetic measurement, b. a statistical parameter related to the electromagnetic measurement is calculated, c. the density of the multi-component is determined, d. the temperature and pressure are obtained, e. based on the knowledge of densities and dielectric constants of the components of the fluid mixture, and the result from the above steps a-c, the water fraction of the multi-component mixture is calculated, characterized by a method for determining the liquid fraction and flow rates of the multi-component mixture where f. the liquid fraction is calculated based on the statistical parameter from step b and the calculated water fraction from step e using an empirical derived curve, g. the velocity of the multi-component mixture is derived, and h.

Abstract: A valve is provided having a valve housing/body configured to be arranged in, or form part of, a piping having a fluid flow, and configured with a pressure tap arranged at a location along the piping to allow pressure of the fluid flow of the piping to be measured, and also having a rotatable orifice plate configured to rotate in the valve body/housing on an axis of rotation positioned at a different location along the piping than the pressure tap for rotating between a first rotatable position for providing a normal fluid flow operation and a second rotatable position substantially perpendicular to the fluid flow for providing a direct flow measurement of the fluid flow determined based on signaling sensed by the pressure tap sensor containing information about a measured pressure at the pressure tap when the orifice plate is in the second rotatable position.

Abstract: Provided are devices and methods for monitoring flow rate in aerosol particle counters. The particle sensor has a particle counter, a flow measurement orifice comprising a differential pressure sensor for measuring differential pressure (DP) across the flow measurement orifice during particle sensor operation and a critical flow orifice. A vacuum source pulls ambient gas through each of the particle counter, flow measurement orifice and critical flow orifice. An atmospheric pressure sensor measures atmospheric pressure (AP) and a bench pressure sensor measures pressure in the particle sensor (BP). The output from the sensors is used to identify a flow condition, such as by a monitor operably connected to each of the differential pressure sensor, atmospheric pressure sensor and bench pressure sensor. In this manner, deviation in flow rate from a target flow rate is readily monitored without the need for expensive sensors or other flow-controlling components.

Abstract: A valve includes a housing, a stern supported by the housing, and a valve member coupled to the stem. The valve member has a first passage defined therein with a metering flow profile, An apparatus includes a well tree having a production bore and a flow metering valve coupled to the well tree and communicating with the production bore. The flow metering valve Includes a valve member having a first passage defined therein with a metering flow profile and a second passage defined therein with an unrestricted flow profile. The second passage having a diameter substantially equal to a diameter of the production bore.

Abstract: A valve includes a body having an upstream port to measure upstream pressure and a downstream port to measure downstream pressure, both ports configured re a common axis, and includes a ball arranged in the body to rotate re the common axis between open and closed positions to allow for fluid flow/non-fluid flow.

Abstract: A position detecting device is equipped with a device main body into which a pressure fluid supplied from a pressure fluid supply source is introduced, and an attaching/detaching mechanism that enables attachment and detachment with respect to the device main body. The attaching/detaching mechanism includes an internal nozzle that delivers, toward the side of a detection nozzle, the pressure fluid supplied to the device main body, and a detection port that supplies, to the detection nozzle, the pressure fluid delivered from the internal nozzle.

Abstract: Methods of measuring gas flow rates in a gas supply system for supplying gas to a plasma processing chamber are provided. In a differential flow method, a flow controller is operated at different set flow rates, and upstream orifice pressures are measured for the set flow rates at ambient conditions. The measured orifice pressures are referenced to a secondary flow verification method that generates corresponding actual gas flow rates for the different set flow rates. The upstream orifice pressures can be used as a differential comparison for subsequent orifice pressure measurements taken at any temperature condition of the chamber. In an absolute flow method, some parameters of a selected gas and orifice are predetermined, and other parameters of the gas are measured while the gas is being flowed from a flow controller at a set flow rate through an orifice. In this method, any flow controller set point can be flowed at any time and at any chamber condition, such as during plasma processing operations.

Abstract: A process fluid pressure measurement system is provided. The system includes a process fluid pressure transmitter having a pair of process fluid ports disposed coplanar with one another on a bottom surface thereof. The process fluid pressure transmitter is configured to measure a differential pressure between the pair of process fluid ports and provide an indication of the measured differential pressure over a process communication loop. A process fluid flange has a first surface configured to mount to the surface of the process fluid pressure transmitter, a second surface opposed to the first surface, and at least one lateral sidewall extending between the first and second surface. A plurality of fins are disposed proximate the lateral surface.

Abstract: A differential pressure based flow sensor assembly and method of using the same to determine the rate of fluid flow in a fluid system. The sensor assembly comprises a disposable portion, and a reusable portion. A flow restricting element is positioned along a fluid flow passage between an inlet and an outlet. The disposable portion further has an upstream fluid pressure membrane and a downstream fluid pressure membrane. The reusable portion has an upstream fluid pressure sensor and a downstream fluid pressure sensor. The upstream fluid pressure sensor senses the upstream fluid pressure at a location within the fluid flow passage between the inlet and the flow restricting element. The downstream fluid pressure sensor senses the downstream fluid pressure at a location within the fluid flow passage between the flow restricting element and the outlet. The process utilizes output of the sensors to calculate the flow rate of the fluid.

Abstract: A simple, passive and rugged device for measuring the flow rate of liquid. A variable area obstruction valve, a differential pressure sensor and a densitometer are combined in a single housing to provide for a highly accurate and precise measure of mass flow.

Abstract: A differential pressure based flow sensor assembly and method of using the same to determine the rate of fluid flow in a fluid system. The sensor assembly comprises a disposable portion, and a reusable portion. A flow restricting element is positioned along a fluid flow passage between an inlet and an outlet. The disposable portion further has an upstream fluid pressure membrane and a downstream fluid pressure membrane. The reusable portion has an upstream fluid pressure sensor and a downstream fluid pressure sensor. The upstream fluid pressure sensor senses the upstream fluid pressure at a location within the fluid flow passage between the inlet and the flow restricting element. The downstream fluid pressure sensor senses the downstream fluid pressure at a location within the fluid flow passage between the flow restricting element and the outlet. The process utilizes output of the sensors to calculate the flow rate of the fluid.

Abstract: A flow meter device that improves a way to obtain an accurate differential pressure across an orifice body situated in line with the flow of gas and liquids. The orifice body is held in place by sealing components integrated into the orifice body. The differential pressure is sensed via openings incorporated into the body of the device, upstream and downstream of the orifice body. The device with its improved accuracy may be used for small and large applications measuring flow. The device is comprised of a meter body; an orifice puck with characteristics; a sealing method; a cover plate, and a way to secure the device into a fluid stream where the device may be used to easily and accurately measure fluid flow in a pipe.

Abstract: Provided are devices and methods for monitoring flow rate in aerosol particle counters. The particle sensor has a particle counter, a flow measurement orifice comprising a differential pressure sensor for measuring differential pressure (DP) across the flow measurement orifice during particle sensor operation and a critical flow orifice. A vacuum source pulls ambient gas through each of the particle counter, flow measurement orifice and critical flow orifice. An atmospheric pressure sensor measures atmospheric pressure (AP) and a bench pressure sensor measures pressure in the particle sensor (BP). The output from the sensors is used to identify a flow condition, such as by a monitor operably connected to each of the differential pressure sensor, atmospheric pressure sensor and bench pressure sensor. In this manner, deviation in flow rate from a target flow rate is readily monitored without the need for expensive sensors or other flow-controlling components.

Abstract: A simple, passive and rugged device for measuring the flow rate of liquid. A variable area obstruction valve, a differential pressure sensor and a densitometer are combined in a single housing to provide for a highly accurate and precise measure of mass flow.

Abstract: A system for measuring a flow rate of a fluid through a plurality of tubes sharing a common flow orifice, the system includes an ultrasonic transducer having a plurality of sensors in communication with a plurality of tubes sharing a common flow orifice. The system includes an electronic module coupled to the ultrasonic transducer, the electronic module connecting selected sensors to a flow rate analyzer for determining a flow rate of fluid through the plurality of tubes on which the sensors are in communication with.

Abstract: A differential-pressure flowmeter that can reduce (eliminate) a difference between the ambient temperature of one pressure sensor and the ambient temperature of another pressure sensor so as to allow for accurate and stable pressure measurement is provided, and a flow-rate controller equipped with such a differential-pressure flowmeter is provided. Provided are a body having a main fluid channel through which a fluid, whose pressure is to be measured, flows, and two pressure sensors held by the body and arranged in series relative to the main fluid channel, and a temperature balancer composed of a material with high thermal conductivity is accommodated in a recess that is formed in the body located below the two pressure sensors.

Abstract: A method of measuring characteristics of a critical orifice type constant flow rate instrument is applied to a dilution mechanism including dilution units in series. Diluent gas of one dilution unit and diluent gas of the other dilution unit are kept flowing in a derivation flow passage for deriving redundant gas of the corresponding one dilution unit in a manner that the total flow rate thereof is equal to a prescribed constant flow rate and that the flow rate of the diluent gas from the corresponding dilution unit is equal to the flow rate in use. The flow rate characteristics of the critical orifice type constant flow rate instrument are measured based on at least an upstream side pressure of the critical orifice type constant flow rate instrument provided in the derivation flow passage at this time.

Abstract: The present invention discloses a recirculation type hydrodynamic oscillator flow meter for measuring the flow of fluids such as gas, air, water and oil, flowing through a conduit. This flow meter gives very accurate measurements over a long period of time since piezoelectric sensors are employed. The principle of working of this hydrodynamic oscillator flow meter is the generation of a self induced jet where the frequency of oscillations of the fluid jet is proportional to the flow rate.

Abstract: An orifice fitting having a drainage system. In some embodiments, the orifice fitting includes a housing having a chamber therein, a flow path extending through the chamber, an orifice plate moveable between a first position in the flow path and a second position outside of the flow path, and a rotatable shaft extending through the housing into the chamber. The shaft has a flowbore extending between a first fluid inlet in fluid communication with the chamber and a fluid outlet formed adjacent the end of the shaft.

Abstract: A refrigeration cycle system is disclosed. A compression unit 11 for compressing the refrigerant by the drive force of a vehicle engine 4 is arranged in a housing 10 of a compressor 1. The flow rate of the refrigerant discharged from the compression unit 11 is detected by a flow rate sensor 15 including a throttle portion 15b and a pressure difference detection mechanism 15a. The throttle portion 15b reduces the flow rate of the refrigerant discharged from the compression unit 11. The pressure difference detection mechanism 15a detects the pressure difference between the upstream side and the downstream side of the throttle portion 15b in the refrigerant flow thereby to detect the flow rate of the refrigerant discharged from the compression unit 11. An oil separator 12 for separating the lubricating oil from the refrigerant discharged from the compression unit 11 is interposed between the compression unit 11 and the flow rate sensor 15.

Abstract: A disposable assembly for use with a sensor assembly, and method for making the same, the disposable comprises a body, a flow restricting element, and a fluid pressure membrane. The body has a lid portion and a base portion. The body defines a fluid flow passage that forms an inlet and an outlet. The flow restricting element is positioned along the fluid flow passage between the inlet and the outlet. The fluid pressure membrane is at a location in the fluid flow passage between the inlet and the outlet. The fluid pressure membrane defines an opening for receiving the flow restricting element. The fluid pressure membrane is located between the lid portion and the base portion of the body.

Abstract: A system for measuring a flow rate of a fluid through a plurality of tubes sharing a common flow orifice, the system includes an ultrasonic transducer having a plurality of sensors in communication with a plurality of tubes sharing a common flow orifice. The system includes an electronic module coupled to the ultrasonic transducer, the electronic module connecting selected sensors to a flow rate analyzer for determining a flow rate of fluid through the plurality of tubes on which the sensors are in communication with.

Abstract: A device for testing decoking tools comprises means 30 for receiving the decoking tool 31 which can be connected to a high-pressure water conduit, as well as means for testing the water jet which exits from a nozzle of the decoking tool 31 following the opening of the high-pressure water conduit. It is possible to test, measure and analyse the high-pressure water jet exiting from the nozzle by means of this testing device in order to optimize the performance of the decoking tool on the basis of the results of this examination. According to the method of the invention the high-pressure water jet generated by means of the nozzles of the decoking tool is exposed to means for testing the high-pressure water jet.

Abstract: A flow rate device for measuring the flow rate of a fluid flowing through a wellbore is disclosed. The flow rate device includes a differential pressure conduit, a flow restrictor insert and a differential pressure measurement device. The differential pressure conduit is locatable in the wellbore, defines an internal bore, and is adapted to include a restriction having a cross-sectional area to increase the velocity of fluid flowing through the differential pressure conduit to create a differential pressure. The differential pressure conduit defining first and second pressure measuring stations axially spaced along the differential pressure conduit. The flow restrictor insert is located in the restriction to reduce the cross-sectional area of the restriction. The flow restrictor insert defines an internal bore having a cross-sectional area less than the cross-sectional area of the restriction. The flow restrictor insert also has a pressure measuring port aligned with the second pressure measuring station.

Abstract: A gas nozzle measurement apparatus comprises a controllable gas source to provide across a gas plate having gas nozzles, a flow of gas at a constant pressure or constant flow rate, and a sensor plate sized to cover an area comprising at least a portion of the front face of the gas plate. The sensor plate comprises gas flow sensors arranged in locations that correspond to positions of individual gas nozzles of the gas nozzles of the gas plate such that each gas flow sensor can measure a pressure, flow rate, density, or velocity of a gas stream passing through the individual gas nozzle that faces the gas flow sensor, and generate a signal indicative of, or display, the pressure, flow rate, density, or velocity of the gas stream passing through the individual gas nozzle.

Abstract: A differential-pressure flow meter is capable of easily eliminating adhesion to an orifice of an extraneous material. The differential-pressure flow meter includes: a pair of pressure sensors provided on a straight pipe part of a main fluid channel; an orifice unit interposed between the pair of pressure sensors; a columnar orifice body provided on the main fluid channel to be detachable in a direction orthogonal to a flow direction of a fluid in the main fluid channel; and an orifice hole penetrating the orifice body in the flow direction of the fluid, wherein the orifice body is rotatable at a prescribed installation position to reverse an upstream side and a downstream side with respect to the orifice hole, and flow rate measurement is performed by converting into a flow rate a difference in pressure that is obtained from two pressure values sensed respectively by the pair of pressure sensors.

Abstract: A simple, passive and rugged device for measuring the flow rate of liquid. A variable area obstruction valve, a differential pressure sensor and a densitometer are combined in a single housing to provide for a highly accurate and precise measure of mass flow.

Abstract: A method of detecting the presence of a slug of condensate in a conduit carrying a saturated steam comprising using a flow meter to provide an output signal representing mass flow rate of the saturated steam through the conduit; determining the rate of change of the output signal; and generating an alert in response to a predetermined profile of the output signal, when the profile includes a rate of change of the output signal falling outside a predetermined range.

Abstract: The present invention discloses a recirculation type hydrodynamic oscillator flow meter for measuring the flow of fluids such as gas, air, water and oil, flowing through a conduit. This flow meter gives very accurate measurements over a long period of time since piezoelectric sensors are employed. The principle of working of this hydrodynamic oscillator flow meter is the generation of a self induced jet where the frequency of oscillations of the fluid jet is proportional to the flow rate.

Abstract: A compact differential-pressure flow meter with reduced wiring is provided. The differential-pressure flow meter has first and second pressure sensors 12A and 12B fixed to a base member 14 on upstream and downstream sides of an orifice member 11 along a flow channel to determine a flow rate based on a pressure difference measured between the two sides of the orifice member 11 by the pressure sensors. The differential-pressure flow meter includes specific control boards disposed near pressure-sensing parts installed in the respective pressure-sensing device and a main control board disposed in a board installation space formed inside the base member. The specific control boards are connected to the main control board with wires passing through a plurality of wiring conduits provided in housings of the pressure-sensing device, and external wiring are connected to one of the specific control boards or to the main control board.

Abstract: A differential pressure sensor positioned adjacent a first pressure chamber and a second pressure chamber separated by a nozzle. Flow in a conduit is determined by detecting the pressure on either side of a nozzle. Changes in pressure are proportional to a change in flow. An integrated differential pressure sensor having different pressure detecting portions with strain gauges thereon detects differences in deflection of each pressure sensor portion resulting from change in fluid flow. A bridge circuit detects changes in the signals from the two different pressure sensor portions creating a differential which is proportional to a change in liquid flow. The present invention reduces the need for calibration of pressure sensors and improves the detection of fluid flow. The present invention has many applications and can detect small changes in fluid flow and is particularly applicable to the medical field where in many procedures, small fluid flows must be measured or determined accurately.

Abstract: An apparatus for determining fluid flow in a pipe apparatus includes a fluid nozzle in contact with the pipe having a contour without negative pressure gradients along the nozzle's surface as fluid flows through the nozzle. The apparatus includes a transit time ultrasonic flow meter employing at least one acoustic path in communication with the fluid in the pipe and disposed downstream of the nozzle. An apparatus for determining fluid flow in a pipe. The apparatus includes a fluid nozzle in contact with the pipe having a contour defined by a compound cubic. The present invention includes a transit time ultrasonic flow meter employing at least one acoustic path in communication with the fluid in the pipe and disposed downstream of the nozzle. A fluid nozzle for a pipe. A method for determining fluid flow in a pipe.