Abstract: A vortex flowmeter having a optical fiber channel in the device wall, a first sealing element extending into the fiber channel with a contact surface for the optical fiber and at least a second sealing element with a contact surface for the optical fiber, wherein second sealing element being guided in a guide in the device wall. In a sealed state of the fiber fiber channel, the second sealing element is pressed against the contact surface of the first sealing element by a positioning means with the optical fiber located between the contact surfaces of the sealing elements and enclosed thereby, and in this manner, the fiber channel is closed by the first sealing element, the second sealing element and the optical fiber guided between the first sealing element and the second sealing element.

Abstract: An apparatus for measuring a flow velocity and a flow rate of groundwater leaking from the earth surface includes: a storage tank that is fixed to close a side surface and a top surface of an earth surface region from which the groundwater leaks and that stores the groundwater leaking from the earth surface; a liquid column tube that causes the groundwater stored in the storage tank to introduce thereto and causes a water column to rise; and a pressure-type measuring unit that is formed in a top opening of the liquid column tube and that senses a differential pressure. Accordingly, it is possible to easily and rapidly measure a flow velocity and a flow rate of groundwater leaking from the earth surface by the use of a user's terminal in real time, or by time zones, or on the user's request.

Abstract: An adapter fits a diaphragm-type sanitary pressure gauge onto a flanged tubular stub of a sanitary conduit. A cylinder has a lower ring flange that mates with the flange of the tubular stub and an upper flange that mates with the diaphragm mounting foot of the pressure gauge. These are held together with tri-clamps, with suitable sealing glands. The interior of the cylinder is two-tiered, with a larger diameter portion above, a smaller diameter portion below, and an annular shelf or step between. A piston with a larger diameter upper portion and smaller diameter lower portion rides in the cylinder, with a seal ring in the lower portion. A hard rubber pad on the top of the piston contacts the diaphragm of the pressure gauge to transmit fluid pressure from the sanitary conduit to the gauge. A small leak detection hole through the cylinder above the seal ring reveals any leakage.

Abstract: Fuel gauges for fuel supplies for fuel cells are disclosed. Each fuel gauge has a property that is readable by an electrical circuit. These properties are related to the remaining fuel in the fuel supplies. These properties include, but are not limited to, electrical capacitance, magnetic, semi-conducting resistance, bi-metal resistance, and oscillating magnetic field. These fuel gauges are functional at any fuel supply orientation.

Abstract: A system for screening a drag reduction agent that includes at least one pressure vessel, comprising: at least one container having an outlet; a first tube fluidly connected with the outlet of the at least one container; a second tube fluidly connected with the first tube; a timer; and a collection vessel configured to receive a fluid from the second tube is disclosed.

Abstract: A system and method for measuring fluid volume and changes in fluid volume over time, using a simple, low cost architecture is described.

Abstract: A probe 10,170 is provided that measures the speed of sound and/or vortical disturbances propagating in a single phase fluid flow and/or multiphase mixture to determine parameters, such as mixture quality, particle size, vapor/mass ratio, liquid/vapor ratio, mass flow rate, enthalpy and volumetric flow rate of the flow in a pipe or unconfined space, for example, using acoustic and/or dynamic pressures. The probe includes a spatial array of unsteady pressure sensors 15-18 placed at predetermined axial locations x1-xN disposed axially along a tube 14. For measuring at least one parameter of a saturated vapor/liquid mixture 12, such as steam, flowing in the tube 14. The pressure sensors 15-18 provide acoustic pressure signals P1(t)-PN(t) to a signal processing unit 30 which determines the speed of sound amix propagating through of the saturated vapor/liquid mixture 12 in the tube 14 using acoustic spatial array signal processing techniques.

Abstract: A standard industrial pressure gauge is adapted for a sanitary conduit that has been provided with a tubular stub for mounting the gauge. A cylinder has a disk flange that mates with an upper flange of the tubular stub. A cap closes off the top of the cylinder, and a female threaded nipple is affixed on the cap over an aperture through the cap. A piston has one or a pair of O-ring seals seated on the circumferential surface of the piston, with the piston having at least a limited range of motion within the cylinder. The gauge is fitted into the threads of the nipple, and the space above the piston and through the aperture and the nipple is filled with an incompressible fluid. In one embodiment, there is a leak detector hole in the cylinder wall aligned with the space between the two O-rings.

Abstract: Fuel gauges for fuel supplies for fuel cells are disclosed. Each fuel gauge has a property that is readable by an electrical circuit. These properties are related to the remaining fuel in the fuel supplies. These properties include, but are not limited to, electrical capacitance, magnetic, semi-conducting resistance, bi-metal resistance, and oscillating magnetic field. These fuel gauges are functional at any fuel supply orientation.

Abstract: A blood circuit (1) for a dialysis machine is made form plastic material and is provided with a metallic plate (30), which is applied to an external face of the blood circuit (1) and is connectable to a voltage generator (34) in such a way as to form a capacitor, in which the plate (30) and the blood act as the capacitor plates and the plastic material acts as the dielectric.

Abstract: A flow measuring device comprising a housing in which a principal flow duct extends in which pressure drop producing means are located responsible for a pressure drop of the pressure flowing through and in the wall of the duct the tapping openings of a plurality of tapping ducts connected with a flow ascertaining means arranged in the housing are provided. The principal flow duct, including the pressure drop producing means and the tapping openings, is a component of a sleeve-like duct insert inserted into the housing coaxially. The inner face of the socket and the outer face of the duct insert are so designed in the form of interfaces that during assembly of the duct insert a correctly coordinated fluid connection of the duct sections in the housing and in the inserts of the tapping ducts is ensured.

Abstract: A flow measuring device comprising a housing in which a principal flow duct extends in which pressure drop producing means are located responsible for a pressure drop of the pressure flowing through and in the wall of the duct the tapping openings of a plurality of tapping ducts connected with a flow ascertaining means arranged in the housing are provided. The principal flow duct, including the pressure drop producing means and the tapping openings, is a component of a sleeve-like duct insert inserted into the housing coaxially. The inner face of the socket and the outer face of the duct insert are so designed in the form of interfaces that during assembly of the duct insert a correctly coordinated fluid connection of the duct sections in the housing and in the inserts of the tapping ducts is ensured.

Abstract: An elongate probe suitable for measuring one or more properties of a stream of fluid, the probe having an external planar sensing surface, which in use is exposed to the stream of fluid, at a longitudinal end thereof and comprising a plurality of sensors at the planar external sensing surface.

Abstract: Methods and apparatus for measuring the volume and/or flow rate of liquid contained in a vessel of the type from which liquid is dispensed via a fluid path having one end submerged in the liquid and another end extending above the level of said liquid by a pressure difference DP between a pressure P2 above the liquid and a pressure P1 at a predetermined point in said fluid path. The volume of liquid is deduced from DP and the height H between the surface of said liquid and said predetermined point in said fluid path, by determining the depth D of said liquid from said height H, and determining the volume of said liquid from said depth D. The flow rate is deduced from a first value DP1 of DP under zero flow conditions and a second value DP2 when liquid is flowing through said fluid path and determining the flow rate Q of said liquid from the difference between DP2 and DP1. Flow rates may be time integrated in order to determine volumes dispensed from the vessel.

Abstract: A liquid level and weight sensor utilizes a pressure sensor of any type positioned at the base of the liquid or weight. A second pressure sensor is positioned external to the liquid or weight to measure the ambient pressure. Ambient pressure is subtracted from the total pressure indicated by the base positioned pressure sensor to determine the actual pressure exerted by the liquid or weight on the base positioned sensor. The actual pressure is then utilized in the calculation of liquid level or weight. The determination of liquid level requires that both the pressure and density of the liquid be known. When the density of the liquid is not known, a third pressure sensor is inserted in the tank at a known level above the first. The differential pressure and differential level are determinative of the liquid's density.

Abstract: The invention relates to a device for measuring a liquid flow through a tube, which tube, which has an inflow side and an outflow side disposed under said inflow side, is filled with said liquid, as a result of which a liquid column is formed in the tube, with human senses or sensors being used for measuring the liquid flow, and as well as applications therefor.

Abstract: Actual inflow rates of gas and liquid into a wellbore from a reservoir are determined by flowing fluid from a wellhead for a prolonged duration so as to affect the reservoir. The flow and the wellhead pressure are measured. Knowing or determining an gas volume, a total rate of fluid inflow from the reservoir can be determined. If the well was previously flowing, then an original fluid flow rate is known. An incremental inflow rate of fluid from the reservoir is calculated as being the difference between the total rate of fluid inflow less the original rate of gas flow. Using an exponential relationship for the pressure change during wellhead flow, a theoretical curve pressure response curve can be created, displayed and compared against the actual pressure response, any deviation therebetween being indicative of fluid inflow from the reservoir.

Abstract: A method and apparatus for measuring the viscosity of a sample solution which comprises an input tube for transporting a sample solution flow towards a splitter for diverting input flow into two distinct flow streams where three capillary tubes are located in the two flow streams placed downstream from the flow splitter, where each flow stream has one or two capillary tubes a delay volume, and a flow through transducer having hydraulic connections placed in one stream or in two streams used for measuring the pressure difference across the capillary tubes.

Abstract: A flow meter for monitoring liquid flow at low or intermittent rates, such as waste water gravity flow from a reverse osmosis system. Water flow from the system enters a meter chamber vented to atmosphere. Water drainage from this chamber is adjusted to match the incoming water flow, and the level at which this occurs is determinative of the rate of waste water flow. Various ways are disclosed to adjust the rate of water drainage from the chamber, including the use of multiple drainage tubes.

Abstract: A method is provided for determining the actual inflow rates of gas and liquid into a wellbore from a reservoir. The wellhead is first closed and the wellhead pressure is measured over time. For a briefly period, gas is flowed from the wellhead and the wellhead pressure is measured again. Using the two conditions, the original wellbore gas volume and an original fluid inflow rate is determined. Gas is again flowed from the wellhead, both the flow and the pressure being measured, but this time for a prolonged duration, sufficient to affect the reservoir. Assuming original gas inflow rate and original gas volume remain unchanged during the prolonged flow, a total rate of fluid inflow from the reservoir is determined, and finally an incremental inflow rate of fluid from the reservoir is calculated as being the difference between the total rate of fluid inflow less the original rate of gas flow. If the well is a gas well, the incremental fluid inflow is the actual gas inflow rate.