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| Number | Title | Issue Date |
| 7258007 | Device for measuring the density and/or specific gravity of a liquid A device which is used to measure the density of a liquid, includes an enclosure (1) which is impervious to the liquid to be measured. The enclosure (1) has a rigid deformation-resistant casing housing at least one reference body (3) which is su... | 08/21/2007 |
| 7257496 | Method and apparatus for monitoring SF6 gas and electric utility apparatus A method for detecting loss of SF6 gas from electrical utility apparatus determines a molar ratio of gas in a container at an initial time and of gas in the container at a subsequent time. Measurement of temperature is determined by averaging ambient temperature and... | 08/14/2007 |
| 7155956 | Medium, method and system for proving a turbine meter A novel medium, method and system for proving a turbine meter for use with natural gas. The novel test medium is a gas having the following characteristics: (a) Density>2×Density of Natural Gas; (b) Dynamic Viscosity | 01/02/2007 |
| 7102101 | High voltage circuit breaker with internal tank heater A high voltage circuit breaker with a gas-insulated tank is provided. Enclosed with the tank is an elongated heater having at least one heating element enclosed in an outer tube. The heater is located coaxially within the tank and is surrounded by the insulating gas... | 09/05/2006 |
| 7037724 | Method for storing and transporting crude oil Disclosed is a method for transporting blended crude oils comprising the steps of; (a) admixing a first crude oil with a second, different crude oil to form a crude oil admixture; (b) determining a first value representing the content of unprecipitated asphaltenes i... | 05/02/2006 |
| 7036362 | Downhole determination of formation fluid properties A method is disclosed for determining viscosity and density of fluid from formations surrounding an earth borehole, including the following steps: (a) suspending a formation testing device in the borehole; (b) drawing formation fluid into the device; (c) causing the... | 05/02/2006 |
| 7032449 | Measurement of fluid properties in vessel and sensor for same A sensor for measuring properties of a fluid in a vessel, includes a sensor mount adapted to mount within a wall of a vessel; a sensor body extending substantially vertically from the sensor mount; and a plurality of sensors spaced vertically along the sensor body, ... | 04/25/2006 |
| 6992590 | Systems and methods for sensing a fluid supply status A system that includes a container containing a fluid, a fluid line coupled with the container, and a pump configured to pump the fluid out of the container through the fluid line. The system further includes a sensor that includes a wireless transmitter. The sensor... | 01/31/2006 |
| 6938635 | Level switch with verification capability The present invention comprises a novel level switch which may be employed to detect liquid levels within a process vessel. The level switch of the present invention is self validating so that manual testing is not required in order to ensure proper operation and sw... | 09/06/2005 |
| 6931926 | Liquid depth sensing system with liquid identification capability The present liquid depth sensing system with its liquid identification capability provides an economical device which may be installed in a multitude of different applications to perform multiple quantity measurement and detection functions. The present system inclu... | 08/23/2005 |
| 6929715 | Method and a device for measuring concentrations A method and a device for measuring concentrations especially in a pulp suspension, from which a sample has been taken. The sample is collected in a measuring vessel, in which a piston is guided upwards and downwards in order to press the sample from each direction ... | 08/16/2005 |
| 6907780 | Fuel level sensor According to an exemplary embodiment, the present technique relates to a fuel sensor for determining operational fuel level (hnew) in a fuel tank (14). In the exemplary embodiment, an isolated airspace (44) is created. By monitoring the pres... | 06/21/2005 |
| 6860154 | Pressure sensor and manufacturing method thereof It is an object of the present invention to provide a touch mode capacitive pressure sensor having higher pressure durability than conventional sensors. In this invention, a touch mode capacitive pressure sensor has a diaphragm made from boron-doped silicon, and the... | 03/01/2005 |
| 6829933 | Device for determining the density of an electrolyte The invention relates to a device (2) for determining the density of an electrolyte (4). Said device (2) comprises at least two immersion tubes (9, 10) provided with an open orifice (52) and immerging at different depths in the ele... | 12/14/2004 |
| 6807857 | Method and apparatus for determining density of a flowing fluid The current invention provides a process and apparatus for determining the density of a flowing fluid without requiring knowledge of the fluid's Theological properties. The process of the current invention is capable of providing continuous “real time” analysis ... | 10/26/2004 |
| 6687643 | In-situ sensor system and method for data acquisition in liquids An in-situ sensor system and method which measures the density of a liquid accurately with pressure sensors by measuring pressure in the liquid at two separate positions defined by a fixed distance. The fixed distance is known accurately to at least the n... | 02/03/2004 |
| 6550327 | Device for measuring the density of a flowing medium The device includes a pipe section in loop form having two arms which make an angle with the horizontal, which arms each contain two pressure sensors which are located some distance apart in the direction of flow, as well as a processing unit, connected t... | 04/22/2003 |
| 6282953 | Solid state fuel level sensing A pair of solid state pressure sensors are disposed near the bottom of a fuel tank vertically spaced with one a unit distance above the other. A third solid state sensor is disposed in the tank at the highest point under the upper wall. The apparent hydro... | 09/04/2001 |
| 6263914 | Gas density monitor assembly A density monitoring assembly for use in monitoring the gas density within a high voltage circuit breaker tank is disclosed. The density monitoring assembly is coupled directly to an exterior surface of said tank and provides electrical signals indicative... | 07/24/2001 |
| 6234019 | System and method for determining a density of a fluid A system and method for obtaining a fluid density of a fluid in a tank includes, for example, a first sensor coupled to a second sensor through an extension. The two sensors are coupled to a transmitter. The sensors are lowered into the fluid of the tank ... | 05/22/2001 |
| 5837893 | Method for detecting pressure measurement discontinuities caused by fluid boundary changes A pressure data validation method which measures differential pressure along with measuring the absolute pressure while testing a well. The method uses a differential pressure gauge having a known distance between the two differential pressure measuring g... | 11/17/1998 |
| 5827963 | System and method for determining a density of a fluid A system and method for obtaining a fluid density of a fluid in a tank includes at least two sensor/transmitter assemblies to obtain fluid pressure measurements at different fluid levels in the tank. After the respective fluid pressures are obtained, the ... | 10/27/1998 |
| 5731518 | Solder fluxer with liquid flux density control An apparatus for applying solder enhancing liquid flux to objects for soldering including a fluxer wherein the density of the liquid flux supplied to the fluxer is controlled by a device for determining the density intermediately a flux storage container,... | 03/24/1998 |
| 5660617 | System and method for maintaining multiphase flow with minimal solids degradation An apparatus and method for maintaining continuous flow in a closed loop test system, of a multiphase composition such as that utilized and obtained from oil and gas wells and the like. The method and system provide a test structure whereby a study of the... | 08/26/1997 |
| 5509303 | Controllable sensitivity differential pressure fluid density instrument The present invention is a differential pressure fluid density instrument comprising a housing having a plurality of ports positioned at spaced-apart locations along the housing, a differential pressure transducer, and a valve adapted to selectively conne... | 04/23/1996 |
| 5502435 | Method and system for monitoring circuit breaker gas pressure A method and system are provided for monitoring the pressure of gas in a gas filled circuit breaker container based on a temperature compensated gas pressure signal which is compared with a signal representing a desired gas pressure in the container to pr... | 03/26/1996 |
| 5388451 | High voltage transmission switching apparatus with gas monitoring device A high voltage switching apparatus 10 is described containing an arc-quenching gas containing sulphurhexafluoride in a vessel 12 that is monitored by a gas monitoring device 20. A temperature transducer 34 is attached to the exterior of the vessel 12 to s... | 02/14/1995 |
| 5319964 | Apparatus, method and system for monitoring fluid Fluid level in a container is determined using a single pressure transducer connected to a portable body. The body contains a computer having a memory in which fluid level-to-fluid volume conversion data are stored for different shapes of containers so th... | 06/14/1994 |
| 5272920 | Apparatus, method and system for monitoring fluid Fluid level in a container is determined using a single pressure transducer connected to a portable body. The body contains a computer having a memory in which fluid level-to-fluid volume conversion data are stored for different shapes of containers so th... | 12/28/1993 |
| 5211678 | Apparatus, method and system for monitoring fluid Fluid level in a container is determined using a single pressure transducer connected to a portable body. The body contains a computer having a memory in which fluid level-to-fluid volume conversion data are stored for different shapes of containers so th... | 05/18/1993 |
| 5201337 | Apparatus for mixing fluids of different specific gravity A specific gravity control apparatus 200 is disclosed which uses a plurality of electrodes 202, 204 and 206 to measure the height of a control liquid within a leg 8 to provide enhanced control of the specific gravity of the solution S. In a specific gravi... | 04/13/1993 |
| 5115679 | Level measuring bubbler tube tip A level measuring system for measuring the level of a fluid in a tank employing tubes through which gas is passed extending to different levels in the fluid, whereby the level may be measured by comparing the differences in pressure necessary to release b... | 05/26/1992 |
| 5020368 | Method and system measuring a vertical density profile of a fluid Method and system for measuring vertical density profile of fluid by pressurizing an array of pipes, determining level and pressure signals on each pipe and deriving profile therefrom.... | 06/04/1991 |
| 4984451 | Method for determining physical properties of liquids A method is disclosed for determining physical properties of liquids, such as specific gravity or density. The method is performed through the use of a mainframe controller, a remote sensor, and two sets of dip tube assemblies, one for each of two measure... | 01/15/1991 |
| 4708017 | Floating hydrometer with energy dissipating baffle An instrument (10) particularly suited for use for purposes of measuring the presence of suspended solids in a slurry. The subject instrument (10) is comprised of a floating probe portion (12), a long tubular member (14) and an energy dissipating baffle (... | 11/24/1987 |
| 4671106 | Fuel energy quantification system A fuel energy analysis system is disclosed utilizing a first hydrostatic sensor, calibrated to specific fuel tank geometries, to monitor fuel quantity; and an additional hydrostatic sensor located at a different geometric height from said first sensor, al... | 06/09/1987 |
| 4630478 | Liquid volume sensor system This invention relates to apparatus for determining the amount of liquid in a tank by measuring the pressure at the bottom and at a height above the bottom of the tank, and provides apparatus for compensating for apparent volume measurement variations cau... | 12/23/1986 |
| 4625553 | System to determine the level and weight of liquid in a tank or the like A system for measuring the density of a hydrostatic liquid in a container includes a pair of serially connected pressure sensors mounted in the liquid, a constant volume gas flow source connected to an inlet of one pressure sensor, a second pressure senso... | 12/02/1986 |
| 4625548 | Hydrostatic head pressure sensors for a system to determine fluid level and weight A hydraulic liquid pressure sensor for use in a gas operated pressure sensor system includes a sensor body with a generally circular membrane resting surface, an inlet connected to a peripheral portion of the surface and an outlet opening from a central l... | 12/02/1986 |
| 4583393 | Ultrasonic density meter with damping A density meter includes a main body having a vertically elongated chamber to contain a test fluid. A passageway in the main body connects to the chamber near its bottom end. The passageway spans at least a bottom portion of the chamber and leads to the e... | 04/22/1986 |
