Abstract: A method for maintaining a boiling rate of a base fluid can include a determination of a fluid level of a turbulated base fluid in a reservoir. The fluid level can be determined by measuring at least one first height of the turbulated base fluid above the fluid level with at least a first sensor. The fluid level can be determined by measuring at least one second height of the turbulated base fluid below the fluid level with the first sensor. The method can include the establishment of the fluid level of the turbulated base fluid. The fluid level can be established according to the measured at least one first and second heights. The method can include the graduated introduction of an input fluid into the reservoir. A control valve can gradually introduce the input fluid in proportion to the established fluid level of the turbulated base fluid.

Abstract: A sampling assembly and a method of operation of a sampling assembly are described. An assembly according to an embodiment includes an inlet, an outlet, a liquid-flowing section disposed between the inlet and the outlet, a vapor-flowing section disposed between the inlet and the outlet, and a probe port on the liquid-flowing section. The vapor-flowing section is distinct from and above the liquid-flowing section. A method according to an embodiment includes receiving a liquid chemical interspersed with a gas at an inlet of a sampling assembly and segregating the liquid chemical from the gas. The liquid chemical flows in a liquid-flowing section of the sampling assembly, and the gas flows in a vapor-flowing section of the sampling assembly. The method further includes monitoring a property of the liquid chemical in the liquid-flowing section and releasing the liquid chemical and the gas through an outlet of the sampling assembly.

Abstract: An apparatus for metering the delivery of an aerosol. The apparatus has a variable acoustic source and a microphone, both acoustically coupled to a volume having a fluid region and an air region. The apparatus may also include a processor to determine a volume of the air region based on signals received from the microphone and the variable acoustic source. A fluid valve is coupled to the processor, and is configured to allow an amount of fluid to exit the fluid region associated with the volume of the air region. An atomizer, coupled to the fluid region, is configured to aerosolize at least a portion of the fluid.

Abstract: Fluid level measurements for the shared tank and outflow information provided by calibrated flow meters corresponding to dispensing stations connected to the shared tank may be used to derive a filled volume model for the tank as a function of fluid level. Subsequently, a filled volume change for a shared tank over a selected time interval may be determined from pre-change and post-change fluid level measurements. The change in filled volume may be compared with the total fluid flow over the selected time interval as indicated by the flow meters of active dispensing stations. If the filled volume change for the tank is substantially different than the total fluid flow indicated by the flow meters, the flow meters may be collectively adjusted to provide a more accurate indication of the filled volume change in the shared tank.

Abstract: An apparatus for measuring a quantity of milk yielded by an animal during a milking process comprises a container, a supply unit, a discharge unit, a filling level measuring device, a control unit and an evaluation unit. The supply unit is configured to feed milk into the container and can be connected to the milking unit of a milking machine. The discharge unit is configured to discharge milk from the container and can be connected to the milking line of the milking machine, which is adapted to have applied thereto a milking vacuum. The discharge unit comprises the means for changing the size of a discharge opening through which the milk flows when it is being discharged from the container. The discharge opening allowing milk to flow through the discharge opening can be adjusted to at least two sizes. The filling level measuring device is configured to measure a filling level of the milk in the container.

Abstract: A method and system for measuring a urinary flow rate minimizes impact noise caused by urine to measure the urinary flow rate using a plurality of load cells when prostatic hypertrophy is diagnosed. The method includes measuring an amount of urine collected into a container using a plurality of load cells, extracting and averaging urinary flow rate signals from the measured results, and removing the impact noise from the urinary flow rate signals, converting the urinary flow rate signals into digital signals through an A/D converting circuit, and outputting the digital signals using a personal computer or a microprocessor analyzer which is interfaced with the A/D converting circuit.

Abstract: A fluid flow tester for measuring minute volumes of fluid and for calibrating medical devices, such as intravenous infusion pumps, includes a plurality of valves and associated conduits which direct fluid from the device being tested to a transparent vertical column. A plurality of sensors, each including a light emitting diode and a light detector, are arranged along the axial length of the column at a predetermined spacing between adjacent sensors. Fluid from the device being tested is directed through the flow tester by the valves and associated conduits into the column where it rises. The meniscus of the fluid rising in the column is detected by the sensors. The sensors provide signals to a microcontroller which calculates the time that it takes for the fluid to pass each sensor. Knowing this timing and the volume of the column, the flow rate of the fluid may be calculated by the microcontroller.

Abstract: A detection apparatus for measuring fluid in a vessel, comprising: at least one processor for receiving, processing and storing data from sensors in the vessel, at least one vertical support disposed within the vessel and at least one pair of sensors connected to the at least one vertical support. The sensors continuously provide measurement data to the processor, wherein the processor synchronously polls measurement data from the sensors, continuously calculates values, and compares the calculated values to at least one predetermined range of values for the fluid in the vessel to identify whether the calculated values are within the predetermined values. The processor communicates the compared value to a data collector.

Abstract: A flow verification sensor apparatus (30) is used with a constant volume pump (11) that pumps a liquid product (13) from a container (12). A plummet (32) is positioned in a flow tube (31). A sensor (33) is positioned upward from the lower end of the flow tube (31). A timer (34) measures the length of time for the plummet (32) to move from a first position to a second position after activation of the pump (11). Suitable alarms (50) are operated to indicate low flow or out of product conditions.

Abstract: In a method for calculating a time-related fill level signal (h(t)) from a sensor signal (s(t)) of a fill level sensor for detection of the fill level of a liquid, the time-related fill level signal (h(t)) is calculated as a function of the sensor signal (s(t)) and the modeled runoff behavior of the liquid on the fill level sensor.

Abstract: The invention relates to an automatic system for collecting, weighing and releasing solid particles comprising a leak-tight weighing chamber (1) which houses a container (5), whereon the particles entering said chamber (1) via an inlet (4) come to rest. The weight of the container (5) is transmitted to a weighing sensor (7) which is also located inside the weighing chamber (1) but which does not come into contact with the walls of said chamber. Once the sample has been weighed, it is removed from the chamber through the injection of compressed air. The inventive system can be used directly to determine the mass flow of solid particles in pneumatic conveyor lines by means of the integration thereof in automatic sampling systems. For this purpose, a signal is emitted which can be integrated in flow regulation loops in order to control said flow.

Abstract: The invention relates to a method for determining the current filling level of a liquid, preferably a calibrating, quality control, or cleaning fluid, or waste water, in a container, for example of an analyzer, where an immersion pipe is dipped into the liquid in the container to be filled or drained. The immersion pipe is connected to a pumping device via a tube system. The pressure p in the tube system is measured and increased, starting from the ambient pressure p0, until a first discontinuous pressure change occurs at pressure p1 due to the liquid column in the immersion pipe being forced out of the pipe, and/or the pressure p in the tube system is decreased until the liquid column in the immersion pipe reaches a change in cross-section of the immersion pipe, which change is situated above the maximum filling level of the liquid, such that a second discontinuous pressure change occurs at pressure p2 due to the liquid column reaching the change in cross-section.

Abstract: A method and device for making measurements of the characteristics of a fluid, particularly the milk, which flows in pulsations in a conduit. The device has a measuring region wherein at least one characteristic of the fluid is determined. The measurement is made during an optimal measuring window which constitutes a time interval while a pulsation of the fluid is received in the measuring region which contains a sensor or sensors for measuring one or more selected characteristics of the fluid, such as color, conductivity or acoustic qualities. The measuring region may be in a bypass passageway in the conduit which may be incorporated in a teat cup. The pulsations in the teat cup may be used to define an optimal measuring window for measuring one or more characteristics of the fluid as it flows in pulsations through the conduit. The sensed entry or approach of a pulsation into the measuring region may also be used to define the optimal measuring window.

Abstract: A self-contained symmetrical outflow meter for resting on a non-skid surface such as pavement and timing the rate of water drainage from the surface. The outflow meter is characterized by a circular base, a pair of handle supports which extend upwardly from the base and a handle which spans the top end portions of the handle supports. A funnel is mounted between the handle supports beneath the handle and a vertical water discharge tube for containing water is mounted in the base, beneath the funnel. A spring-loaded plunger is mounted in the discharge tube for selectively sealing a water discharge opening provided in the base. Upper and lower adaptors are suspended from the funnel inside the water discharge tube, and upper and lower switch floats are vertically displaceably mounted on the respective upper and lower adaptors. A timer is provided on a timer support which spans the upper ends of the handle supports, and is wired to the switch floats.

Abstract: Detection of the flow of a fluid, and also measurement of the flow of a fluid, is provided by feeding the fluid flow through a cylindrical chamber to form a cyclonic circulation of the fluid in the chamber. A movable member is moved by the fluid flow. As one example a ball rotates around the inside of the chamber and the passage of the ball detected, at a particular position. An alternative is an annular member also rotated. There can be an optical detection or electronic detection. Output signal can be generated by the movement. Such signals can be processed to give flow rates. The chamber is positioned in a by-pass flow line, with the flow rate of the by-pass related to the total flow.

Abstract: A device and method for determining the flow rate of gas entrapped fluids delivered in a pulsating flow, such as milk, wherein the invention boasts an improved fluid level detection arrangement for determining flow rates with improved accuracy, and an improved temperature sensing arrangement for determining the temperature of the gas entrapped fluid with improved accuracy.

Abstract: A measuring apparatus according to the present invention for measuring an injected quantity of fuel at pilot injection in an internal combustion engine, particularly, a diesel engine, which performs main injection process after the pilot injection process, includes: an injection pump for injecting fuel every one injection period; a closed pressure vessel for temporarily storing the fuel injected from the injection pump; a detection unit for detecting change of pressure of the fuel within the pressure vessel; a volume-variable device having a predetermined volume and coupled to the pressure vessel; and a measurement control unit for measuring the injected quantity of the fuel at one injection period based on result of detection by the detection means, by calculating the injected quantity at pilot injection based on a ratio of the change of pressure within the pressure vessel at injection of the fuel and the change of the pressure within the pressure vessel caused by change of the predetermined volume before in

Abstract: A quantity meter for determining the quantity of liquid flowing through a line is provided with at least two electrically conducting elements arranged in the line spaced from each other and being in communication with an electronic circuit. This electronic circuit determines the quantity of liquid which has flowed through the line on the basis of the electric conductivity of the liquid, the length of the interval of time during which a unit of milk passes between the two electrically conducting elements, the distance between the electrically conducting elements, the rate of flow of the liquid and the specific electrical resistance.

Abstract: A meter which measures fluid flow by passing the fluid through a receptacle and determining the mass of fluid in the receptacle. The shape of the receptacle, the fluid flow path within the receptacle and the receptacle outlet are chosen to ensure that for a selected fluid the mass of fluid in the receptacle is a linear function of fluid flow rate. The mass is determined by weighing the receptacle. Total mass flow is determined by integrating the mass measurement over time if particular application of the meter is as a milk meter.

Abstract: Detection of the flow of a fluid, and also measurement of the flow of a fluid, is provided by feeding the fluid flow through a cylindrical chamber to form a cyclonic circulation of the fluid in the chamber. A movable member is moved by the fluid flow. As one example a ball rotates around the inside of the chamber and the passage of the ball detected, at a particular position. An alternative is an annular member also rotated. There can be an optical detection or electronic detection. Output signal can be generated by the movement. Such signals can be processed to give flow rates.

Abstract: A pump station flowmeter is disclosed including a pump status comparator for creating level status without being connected to any level sensors by comparing pump status to a list of association between expected pump status and levels. The wet well dimension, pump status signals, clock signals, level status are recorded in memory before being used as input to a flow calculator which calculates inflow and outflow. A flow rectifier readjusts the inflow and outflow according to a variable proportion of the difference between an average of many outflows and one outflow, and using this difference to readjust a variable tolerance and the variable proportion. This optimizes accuracy according to each specific installation. Abnormal pump operations are confirmed when a predetermined number of possible abnormal pump operations occur in a row are detected by comparing the outflow to the average of many outflows plus or minus the variable tolerance.

Abstract: A pump station flowmeter is disclosed including a sudden high inflow change detection circuit for eliminating from a series of emptying characteristic calculations taken over a period of time those measurements which are outside of a predetermined acceptance range. The wet well dimensions, level detector signals, clock signals and pump status signals are supplied as inputs to both a volume rate of change calculator and to the sudden high inflow change detector. In the event of an undesirable measurement, the sudden high inflow changes detection circuit operates a gate to isolate the volume rate of change calculator from the emptying characteristic calculator that calculates outflow. A flow integrator is provided for calculating volume per cycle from the volume rate of change signal, and an inflow calculator serves to produce inflow from the volume per cycle signal.

Abstract: A device for monitoring the leakage of cooling gas into the stator water cooling system is disclosed. The vent from the water cooling reservoir tank is connected to the inlet of a U-shaped passageway and the outlet of the passageway is connected to an atmospheric vent. A liquid is provided in the passageway so as to prevent the passage of cooling gas from the inlet to the outlet without a desired pressure differential. At the specified pressure differential however, gas bubbles from one side of the passageway to the other and is trapped by a measuring cup in one position. When a sufficient quantity of gas is passed under the cup, the buoyancy of the cup becomes positive allowing it to rise to a second position where at least a portion of the gas is discharged. Because the amount of gas discharged can be determined and a number of cycles of operation of the cup can be measured, the flowrate can be precisely measured.

Abstract: A pump station flowmeter is disclosed including a sudden high inflow change detection circuit for eliminating from a series of emptying characteristic calculations taken over a period of time those measurements which are outside of a predetermined acceptance range. The wet well dimensions, level detector signals, clock signals and pump status signals are supplied as inputs to both a volume rate of change calculator and to the sudden high inflow change detector. In the event of an undesirable measurement, the sudden high inflow change detection circuit operates a gate to isolate the volume rate of change calculator from the emptying characteristic calculator that calculates outflow. A flow integrator is provided for calculating volume per cycle from the volume rate of change signal, and an inflow calculator serves to produce inflow from the volume per cycle signal.

Abstract: The flow of process gas used in a semiconductor wafer fabrication system is verified against the known flow of a verification gas using a derivative of the ideal gas law:n'.sub.pro =(P'.sub.pro /P'.sub.ver) n'.sub.verwheren'.sub.pro is the flow rate of the process gas,n'.sub.ver is the flow rate of the verification gas,P'.sub.pro is the rate of change with respect to time of the process gas pressure entering the chamber, andP'.sub.ver is the rate of change with respect to time of the verification gas pressure entering the chamber.The volume and temperature are maintained constant during the verification procedure.

Abstract: A liquid drainage system is disclosed comprising a combination urine meter element and drainage receptacle, the urine meter element having front and rear walls defining a chamber adapted to receive and measure urine output.

Abstract: This specific density of the liquid/air mixture is measured at successive levels within the reception vessel for the liquid using a reference measurement (Io) representing the specific density of the degasified liquid within a reference measuring path. The ratio of each obtained density value measurement and the reference value is calculated for each measuring level and multiplied with the specific density of the liquid to allow an accurate measurement of the overall liquid volume or flow-rate. Preferably the reception vessel (1) has a respective measuring electrode (El..En) at each measuring level with a common counter electrode (Eo) coupled to an oscillator (4) via a constant voltage circuit (5) and a coupling capacitor (6). Each measuring electrode (El-En) is coupled via a multiplexer (7) and an active rectifier (9) to an A/D converter (10) coupled to a microprocessor (11) controlling a read-out display (12).

Abstract: An apparatus and method for flow and temperature analysis during collection of a urine sample, and for simultaneously maintaining the urine sample sterile. A disposable vessel for collecting the urine is mounted on a commode adapter, and includes a variable capacitor, with a capacitance value which varies with the amount of urine in the vessel. The variable capacitor forms a part of a capacitance bridge. A microprocessor controlled by a clock is used to periodically sample the varying capacitance value as fluid flows into the vessel, and thereby determine the flow rates of the fluid. A tube is provided which communicates with the interior of the vessel for drawing off a sterile sample of the urine for laboratory analysis, and a drain is provided which is operable without contacting the urine. Temperature sensing means are provided for detecting the temperature of the fluid as a function of time, comprising a thermistor or an infrared optical sensor.

Abstract: A gas piston liquid flow controller comprising a pumping chamber of fixed volume, means to separately introduce into said chamber pressurized gas and liquid, means to detect the presence of liquid at predetermined upper and lower levels in said chamber, means to withdraw a stream of liquid from said chamber for delivery to a point of use and a controller to maintain liquid in said chamber to effect constant delivery of liquid to the point of use.

Abstract: The invention includes a device for measuring a quantity of liquid extracted from a dialysis liquid circuit, the device having a reservoir means connected to the dialysis liquid circuit for receiving liquid from the dialysis liquid circuit, at least one measurement container for receiving liquid from the reservoir, a flow channel connecting the reservoir with the at least one measurement container for selectively filling the measurement container with liquid from the reservoir, a level detector disposed proximate a predetermined area on the at least one measurement container for detecting the presence of liquid at a predetermined level, and a drain port on the measurement container for receiving a signal from the level detector to empty the contents of the measurement container after the presence of liquid at the predetermined level is detected.

Abstract: The specific density of the liquid/air mixture is measured at successive levels within the reception vessel for the liquid using a reference measurement (Io) representing the specific density of the degasified liquid within a reference measuring path. The ratio of each obtained density value measurement and the reference value is calculated for each measuring level and multiplied with the specific density of the liquid to allow an accurate measurment of the overall liquid volume or flow-rate. Preferably the reception vessel (1) has a respective measuring electrode (El . . . En) at each measuring level with a common counter electrode (Eo) coupled to an oscillator (4) via a constant voltage circuit (5) and a coupling capacitor (6). Each measuring electrode (El-En) is coupled via a multiplexer (7) and an active rectifier (9) to an A/D converter (10) coupled to a microprocessor (11) controlling a read-out display (12).

Abstract: Electrodes for measuring the level of milk flowmeters and positioned together in a holder of a non-conductive material that extends tight through the bottom of the flowmeter with their active surfaces vertically separated. The electrodes are adjacent pins with their cylindrical surfaces inside the milk flowmeter completely surrounded by the holder to the extent that only the faces of the electrodes are active.

Abstract: A liquid flow measuring device for lubrication systems and the like allows liquid flow measurement to be made with a minimum interruption of liquid flow and no dismantling of lubricant pipes to lubricated elements. The measuring device comprises a container body having a liquid inlet and a liquid outlet for discharging from a lower portion of the body to an outlet line, the body having a transparent side such that liquid level within the container body is visible with a low level mark and a high level mark. The liquid is temporarily prevented from discharging from the outlet of the body, but the liquid is allowed to flow through the inlet of the body so the liquid level rises from the low level mark to the high level mark.

Abstract: This invention relates to a method and apparatus for a liquid mass non-venting flowmeter. The flowmeter apparatus gives correct flow regardless of changes in density, viscosity, or composition of the liquid and corrects flow in spite of errors common in currently used flowmeters, such as calibration shifts, restricted orifices and/or bearing drag and blade wear of turbine meters. The non-venting characteristic allows use with toxic and corrosive materials.

Abstract: In a treatment system for feeding a liquid from a tank having an outlet by a controllable pump operated cyclically, an automatic calibration/measuring system. The system is arranged for determining the volume of liquid pumped each cycle of operation by the pump and comprises a hollow sight glass having first and second sensors coupled thereto. The sight glass is in fluid communication with the tank. The first sensor is arranged to provide a first signal when the level of liquid in the container reaches it while the second sensor, which is located below the first sensor, provides a second signal when the level of liquid in the container reaches it. The container defines a predetermined volume between the first and second sensors. The system also includes a controller to determine the actual number of cycles of operation of the pump required to pump the predetermined volume and if that number has deviated from a preestablished number. If so, the pump is controlled in response to the detected deviation.

Abstract: This invention relates to a method and apparatus for a liquid mass flowmeter. The flowmeter apparatus gives correct flow regardless of changes in density, viscosity, or composition of the liquid and corrects flow in spite of errors common in currently used flowmeters, such as, calibration shifts, restricted orifices and/or bearing drag and blade wear of turbine meters.

Abstract: There is provided a method of determining the total inflow of a liquid through a liquid-flow system such as a sewage pumping station, in which liquid enters a sump cavity and is pumped out of the sump cavity on a periodic basis. The probable inflow rate during each pumping cycle is derived by first determining the true inflow rate prior to the beginning of a pumping cycle and extrapolating its trend forward through the time of the pumping cycle to arrive at a first calculated inflow rate, then determining the true inflow rate after the end of a pumping cycle and extrapolating its trend backward through the time of the pumping cycle to arrive at a second calculated inflow rate, and averaging the first and second calculated inflow rates to obtain the probable inflow rate during the pumping cycle. This latter rate is then multiplied by the time during which pumping takes place to yield an inflow during pumping, and this amount is added to the sump volume for each complete cycle.

Abstract: A device which measures the amount of milk which has been milked by a combination of a swinging member 2 and a tank 5; and a weight balance section, thereby enhancing accuracy in measurement as well as reducing in size the device. A measuring method for total milk amount by using the measuring device and by measuring the amount of milk which is filled in the tank 5 and the amount of milk which does not flow into the tank 5 at the time of discharging with the rotational cycles of the swinging member 2 to thereby achieve a higher precision.

Abstract: The separator accepts both the casing annulus and tubing production streams issuing from an in situ combustion project production well. Most of the gas in the flow is first separated from the liquid and solids, by centrifugal action. This gas is removed from the separator. The remaining mixture is accumulated until a pre-determined weight is in hand, at which point the accumulated batch is dumped. The time taken to accumulate the batch is noted. Computational elements then determine the mass flow rate of the dumped mixture.The separator comprises an upright cylindrical vessel having tangential inlet means at its upper end and a dump outlet at its base. The gas-liquid-solids production mixture enters the vessel chamber through the inlet means and is spun, to form a central gas vortex and an outer, downwardly descending liquid-solids mixture. The separated gas leaves the chamber through an outlet line at the upper end of the vessel.

Abstract: A method and device are disclosed for calibrating a regulated flow spraying apparatus of the type including a source of spraying fluid under pressure, and spray nozzles, the flow rate of the spray nozzles being regulated by varying the pressure of the liquid delivered thereto, the regulation being controlled as a function of at least one external parameter and a calibration parameter. Fluid from the source is conveyed to a calibration circuit comprising a flow rate sensor and at least one calibration nozzle. The flow rate and the pressure of the fluid are measured in the claibration circuit. The calibration parameter is calculated from the measured values of the flow rate and pressure.

Abstract: A flowmeter has a tank disposed between a discharge circuit and a supply circuit from which the tank is refilled when the level of the liquid in the tank falls below a predetermined level. A plunger is suspended in the tank by a force sensor. The output of the force sensor is used to measure the rate of flow from the tank to the discharge circuit except when the tank is being refilled. Flow from the tank during a refilling cycle is approximately measured in response to flow parameters in the discharge circuit which are independent of the force sensor and liquid level in the tank. The flow parameters in the discharge circuit are monitored and calibrated during each tank discharge cycle, and the new calibration values are used during the next tank refilling cycle, to obtain reasonably accurate continued flow measurement during each tank refilling cycle.

Abstract: This invention provides a device for measuring a whole day urinary output, which includes an outer cylindrical container and an inner hollow tubular container positioned in the outer cylindrical container for proportionally sampling urine from the outer container. The inner container is vertically studded in the outer container and both containers are openably-closably communicated with each other at the bottom of the device and the inner container is openably-closably communicated with a reservoir.

Abstract: A method and apparatus for continuous weighing of a fluid material is described, wherein the material is continuously fed to a weighing container and discharged therefrom, the weighing of the material during filling and the estimated weight thereof during discharge being determined, and by means of a computer, used to generate values which will give the total weight of the material during the entire weighing operation.

Abstract: There is provided a method of determining the total inflow of a liquid through a liquid-flow system in which the liquid enters a sump cavity and is pumped out of the sump cavity by pump means. Computing means calculates an on-going total inflow volume for the liquid by (i) adding in the sump cavity volume between a lower and upper limit level each time the liquid surface rises to the upper limit level, and (ii) determining the inflow rate over the last portion of the filling time just described and extrapolating this inflow rate over the time when the pump means is pumping to yield an incremental quantity, such quantity being added in to the on-going total inflow volume.

Abstract: Measuring the flowrate of a liquid by directing the liquid to a vertically-positioned collection tube, periodically sensing the height of liquid in the tube, and averaging a plurality of data points to obtain an average flowrate value.

Abstract: A device for determining the flow rate of a liquid flowing from an open discharge. The liquid is directed into a bucket with a first sensor located low in the bucket and second sensor located high in the bucket. The volume of the bucket between the sensors is known. The first and second sensors when in contact with the liquid start and stop an electronic timer respectively. The flow rate is determined by dividing the time measured into the known volume. In the preferred embodiment, the calculations are performed electronically and the results display on a digital liquid crystal display.

Abstract: The invention relates to a collecting vessel for medical purposes, i.e. medical fluids, which, in one-piece construction, forms a fluid collecting and measuring system and two pouch parts that can be joined together and with which inflow of the fluid, e.g. urine, can simultaneously be checked from the outside.

Abstract: This invention is a compact, precise, and relatively simple device for use in determining the average rate of flow of a liquid through a conduit. The liquid may be turbulent and contain bubbles of gas. In a preferred embodiment, the flowmeter includes an electrical circuit and a flow vessel which is connected as a segment of the conduit conveying the liquid. The vessel is provided with a valved outlet and is partitioned by a vertical baffle into coaxial chambers whose upper regions are vented to permit the escape of gas. The inner chamber receives turbulent downflowing liquid from the conduit and is sized to operate at a lower pressure than the conduit, thus promoting evolution of gas from the liquid. Lower zones of the two chambers are interconnected so that the downflowing liquid establishes liquid levels in both chambers.

Abstract: An apparatus for controlling the volume of flow of a gas. A reference volume has an input conduit connected to the source of gas and an output conduit connected to a utilization device. Valves in the input and output conduits are cyclically controlled to permit pressure in the reference volume to reach a high and then to attain a low. The reference volume pressure is measured twice during each cycle to provide voltages representative of the high and low pressures. Circuit means control the time and duration of operation of the valves to cause the difference between the high and low pressures to equal a predetermined value.

Abstract: A monitor for a pneumatically driven blood pump receives an input correlated to mechanical operation of the blood pump and electrically transforms the information to clinical information related to such factors as stroke volume of the pump, average stroke volume, flow rate and beat rate.