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| Number | Title | Issue Date |
| 7360399 | Apparatus for measuring a density and/or a viscosity of a fluid The apparatus includes a sample tank for collecting and quieting a volume fraction of the fluid to be measured. The sample tank is in communication, at least at times, with a fluid containment via a filling line (L1) and a supply line (L2) connected, a... | 04/22/2008 |
| 7334939 | Method and device for verifying a temperature value at a destination altitude of an aircraft The device comprises a means for measuring a dynamic temperature on the outside of the aircraft, a means for determining a static temperature around the aircraft, using said dynamic temperature, a means for determining, using said static temperature and a thermodyna... | 02/26/2008 |
| 7334452 | Method for characterizing materials by using a mechanical resonator Methods for monitoring a fluid composition include placing a mechanical resonator in the fluid composition and oscillating the resonator. The resonator can be a tuning fork resonator having tines oscillated in opposite directions and in opposite phases. A variable f... | 02/26/2008 |
| 7331218 | Capillary bridge viscometer and method for measuring specific viscosity A bridge viscometer for measuring specific viscosity, ηsp(t), includes four capillaries, a delay volume, and a pressure transducer. The pressure transducer generates a signal indicative of a pressure differential, Δp(t), as a sample is introduced into t... | 02/19/2008 |
| 7284423 | Flow-velocity measuring device A flow-velocity measuring device of a simple structure in which the size in the direction of flow of a measured fluid is small and the size of a surface area for blocking the flow of the measured fluid is small includes: an inlet port formed on a surface of a main b... | 10/23/2007 |
| 7204129 | Real-time system for detecting foreign bodies in food containers using ultrasound An ultrasound system determines the presence of a foreign object in a container of fluid by measuring echo signals from the outer surface of the container and the inner surface of the container. The amplitude of the echo signals are compared to determine the presenc... | 04/17/2007 |
| 7152460 | Apparatus and method for compensating a coriolis meter A flow measuring system is provided that provides at least one of a compensated mass flow rate measurement and a compensated density measurement. The flow measuring system includes a gas volume fraction meter in combination with a coriolis meter. The GVF meter measu... | 12/26/2006 |
| 7134320 | Apparatus and method for providing a density measurement augmented for entrained gas A flow measuring system combines a density measuring device and a device for measuring the speed of sound (SOS) propagating through the fluid flow and/or for determining the gas volume fraction (GVF) of the flow. The GVF meter measures acoustic pressures propagating... | 11/14/2006 |
| 7114373 | Fluid monitoring An apparatus for measuring the viscosity and temperature of a fluid, for example an engine oil, comprises a transducer, which is arranged to vibrate when provided with a drive signal to produce an ultrasonic shear wave; an impedance matching layer that is inserted i... | 10/03/2006 |
| 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 |
| 7024917 | Method and apparatus for an acoustic pulse decay density determination An acoustic transducer is in contact with a near wall that has a much different acoustic impedance than a fluid. The transducer transmits an acoustic pulse into into the wall (such as a plate, a wall of a tube or a wall of a sample chamber) that is in contact with t... | 04/11/2006 |
| 6904786 | Method and apparatus for characterizing materials by using a mechanical resonator A method and apparatus for measuring properties of a liquid composition includes a mechanical resonator, such as a cantilever, connected to a measurement circuit. The mechanical resonator's response over the frequency range depends on various characteristics of the ... | 06/14/2005 |
| 6763698 | Self calibrating system and technique for ultrasonic determination of fluid properties A system and technique for determining fluid properties includes an ultrasonic transducer 30 on a first surface 42 of a solid member 40. An opposed second surface 44 of the member 40 is in contact with a fluid 25 to be monit... | 07/20/2004 |
| 6621990 | Method for determining air density A method for determining a present air density for an imaging mechanism is presented. During a first time period: in a determining and storing action, a nominal air density is stored. In an increasing action, a fan input is increased until a known pressur... | 09/16/2003 |
| 6539775 | Method and apparatus for the measurement of the interchangeability of LPG/air mixtures with natural gas An apparatus for the continuous measurement of the interchangeability of LPG/Air Mixtures with Natural Gas, having a sensor that measures the relative density (specific gravity) of an LPG/air mixture, and associated controls for gas sampling, signal proce... | 04/01/2003 |
| 6295859 | Method and system for remotely determining column density of trace gases An improved OBS based technique that monitors gas emissions from smoke stacks, tail pipes, and other sources, and that separates gas column density from thermal radiance contrast. The technique of the present invention utilizes a software generated digita... | 10/02/2001 |
| 6272905 | Method and apparatus for real time gas analysis A method and apparatus for real time gas analysis involving determining individual concentrations of fluid constituents in a mixture of known constituents by measuring properties of the mixture and solving a set of equations, which relate the individual g... | 08/14/2001 |
| 6244097 | Method for measuring without combustion the heat value of fuel gas The fuel gas or a substream of the fuel gas is passed through a volumetric flowmeter and the volumetric gas flow is measured. In addition, the pressure, temperature and the proportion of at least one inert gas as well as the density and the dielectric con... | 06/12/2001 |
| 6205846 | Method of determining with great accuracy the rate of leakage from the case of an electrical apparatus In the method, pairs of pressure and temperature values are recorded using a pressure sensor and a temperature sensor fixed to a case from the outside and communicating with a dielectric gas, thereby enabling a density value to be calculated for the diele... | 03/27/2001 |
| 6125692 | Density sensor for monitoring the rate of leakage from a switchgear case with improved reliability A density sensor for monitoring a rate of leakage from the case of electrical switchgear filled with dielectric gas under pressure, the sensor comprising a fixing support mounted from the outside in the thickness of the case and communicating with the die... | 10/03/2000 |
| 6076961 | Method and device for determining the low-temperature stability of a hydrocarbon mixture The invention concerns a method for determining the temperature stability of a hydrocarbon mixture capable of phase separation by monitoring the weight variations of a gravimetric sensor part of which is immersed in said mixture. The method consists in: a... | 06/20/2000 |
| 6058761 | Measurement of relative density of combustible gases The relative density of a sample of a supply gas under test is determined by measuring an atmospheric pressure and a pressure differential for the reference gas and the sample gas as each is passed through a small orifice (16) with smooth walls, such as a... | 05/09/2000 |
| 6014888 | Working environment density measuring method An environmental air is sucked by the pump with control unit, and organic solvent contained in the environmental air is collected by the absorbent. Organic solvent having passed through the absorbent is detected by the semiconductor gas sensor. If passage... | 01/18/2000 |
| 6014895 | Determination of gravity by observation of density variations in gases Apparatus to measure gravity comprising means to measure density variations in a material. Apparatus to measure gravity comprising means to measure the distribution of masses in a material. The material may be a gas comprised of one molecular species, a g... | 01/18/2000 |
| 5703278 | Pressurized fluid density balance A conventional fluid density balance beam measurement instrument used for measuring fluid density at atmospheric pressure is converted for use to measure fluid density at super-atmospheric pressure. The conversion is made without modifying the structure o... | 12/30/1997 |
| 5693873 | Method and a system for determining the density of an insulating gas in an electrical apparatus A method and a system for determining the density of an insulating gas in electrical apparatus in the vicinity of parts carrying electrical current, the method comprising the following steps: a) a reference temperature is measured outside the apparatus and in ... | 12/02/1997 |
| 5551282 | Method and apparatus for measuring volume correction using molar quantities A method and apparatus for measuring volume correction in a gas pipeline using a variable volume chamber where the gas is sampled at the temperature and pressure of gas in the pipeline. A portion of a known volume of sample gas is released and a change of... | 09/03/1996 |
| 5482679 | Device for determining the Wobbe index of a gas mixture Device for determining the Wobbe index of a first gas mixture, including a Wobbe index meter having a mixing chamber, and a feed system for supplying a first gas mixture and an oxidation gas to the mixing chamber of the Wobbe index meter. The feed system ... | 01/09/1996 |
| 5421190 | Device for measuring gas density The device serves to measure the density of a gas, in particular of the insulating gas of a gas-insulated electrical installation. It contains two resonators (11, 12) each comprising a piezoelectric crystal (14, 15) and each comprising two electrodes appl... | 06/06/1995 |
| 5363691 | Vibratile sensing instrument An instrument for the detection or measurement of attributes of a material comprises at least one vane which is mounted on a support that allows the vane to vibrate, a drive transducer which is disposed relative to the vane to stimulate vibration therein ... | 11/15/1994 |
| 5327773 | Method and apparatus for measuring steam density by neutron method A method and an apparatus capable of measuring the density of steam within a steam pipe even in limited environmental conditions such as in a steam injection well. A vessel which accommodates therein first and second neutron detectors disposed in mutual l... | 07/12/1994 |
| 5285675 | Acoustic fluid flow monitoring A method of measuring the flow and composition of a fluid or mixture of fluids through a system by determining the temperature, pressure and speed of sound in the fluid or mixture of fluids in the system and calculating the flow, molar density and average... | 02/15/1994 |
| 4956793 | Method and apparatus for measuring the density of fluids The specific gravity, l, of a fluid of interest is determined based on thermal conductivity, k, and specific heat, cp, of the fluid of interest. An embodiment uses proximately positioned resistive heater and thermal sensor elements coupled by t... | 09/11/1990 |
| 4941345 | Method and apparatus for the measurement of gas properties A method and apparatus for the measurement of the properties of fuel gases dependent upon flow and pressure, and more particularly upon the dyanmic viscosity and/or the density of the fuel gases. The apparatus includes a device to control the flow of the ... | 07/17/1990 |
| 4856320 | Method and apparatus for measuring physical adsorption of gases based on dielectric measurements A method and apparatus for measuring physical adsorption of a gas by a solid adsorbent are disclosed. Use is made of a capacitance cell in controlled gas flow communication with a sample cell initially under vacuum and containing the solid adsorbent. The ... | 08/15/1989 |
| 4671099 | Device for measuring the thermodynamic characteristics of a fluid An enclosure 1 has a measurably variable volume chamber 2, a control for controlling the temperature of the fluid contained therein and apparatus for measuring the pressure of the fluid. The chamber is selectively connectable, on the one hand, to a fillin... | 06/09/1987 |
| 4657676 | Sedimentation field flow fractionation Sedimentation field flow fractionation apparatus having a rotor-mounted fractionation column, has detectors positioned to observe the fluids from the column while still in the rotor. Designs include parallel reference and fractionation columns having thei... | 04/14/1987 |
| 4527418 | Method of measuring specific gravity and apparatus utilizing the same A method of measuring the specific gravity of a fluid to be analyzed includes the steps of pressurizing a fixed volume chamber by the fluid to be analyzed, allowing the pressure in the chamber to decay through a fixed restriction between predetermined pre... | 07/09/1985 |
| 4384472 | Apparatus for measuring viscosities and density of fluids An apparatus for measuring the viscosities and the density of fluids comprises: (1) a first hydraulic bridge (I) having two diametrically opposed elements (2,3) through which fluid undergoes laminar flow and two diametrically opposed elements (4,5) throug... | 05/24/1983 |
| 4373376 | Method and apparatus for diagnosing overheating of an electric machine A method and apparatus for diagnosing an overheating of a gas-cooled type electric machine having at least some components coated with an organic insulating material which decomposes into, for example, particles when subjected to high temperatures. The ap... | 02/15/1983 |
