Matches 1 - 50 out of 74 1 2 >


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8656756 Gas sensor  
A gas sensor including a metal shell; a detection element main body held by the metal shell; a porous protection layer coated on a leading end portion of the detection element main body; and a...
8534116 Size segregated aerosol mass concentration measurement with inlet conditioners and multiple detectors  
A system for measuring size segregated mass concentration of an aerosol. The system includes an electromagnetic radiation source with beam-shaping optics for generation of a beam of...
8047055 Size segregated aerosol mass concentration measurement with inlet conditioners and multiple detectors  
A system for measuring size segregated mass concentration of an aerosol. The system includes an electromagnetic radiation source with beam-shaping optics for generation of a beam of...
7966882 Self-calibrating method for measuring the density and velocity of sound from two reflections of ultrasound at a solid-liquid interface  
A method for determining a velocity and density of a fluid without requiring the transmission of ultrasound through the fluid, and a system for performing such a method. The method involves the...
7932490 Size segregated aerosol mass concentration measurement device  
An apparatus and method for estimating size segregated aerosol mass concentration in real time and using a single detector. A beam of electromagnetic radiation is passed through a particle stream...
7905137 Engine oil consumption measurement device and engine oil consumption measurement method  
A measurement device measures engine oil consumption of an engine lubricated by engine oil. The measurement device includes a sensing pipe housing in which a sulfur dioxide sensing pipe arranged...
7864062 Apparatus and method for detecting a change in a specific gravity of a fluid  
Provided is an apparatus for detecting a change in a specific gravity of a fluid surrounding the apparatus wherein the fluid moves upwardly and downwardly with respect to the apparatus. The...
7752885 Gas analysis system and method  
A gas specimen mixture analysis system includes at least one sensor for measuring the concentrations of inert components in the gas specimen mixture, a pressure sensor for measuring the pressure...
7752884 Gas analysis system and method  
A method of analyzing a gas specimen mixture includes measuring the concentrations of inert components in the gas specimen mixture and the pressure and temperature of the gas specimen mixture. A...
7730766 Gas viscosity sensor  
A gas viscosity sensor comprises a signal processing circuit and a sensor element, including a gas pressure generating system and a differential pressure measuring system in fluid communication...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
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...
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...
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...
4328699 Flueric density and force sensor  
Density of a sample or its concentration are sensed by a fluidic device hng a nozzle with a divider for emitting the sample and a reference fluid as layers of a single laminar jet. The deflection...
4327586 Stuffing box for introducing instrument into high pressure conduit  
A stuffing box comprising a housing member having a threaded passage therethrough and having an internally threaded recess, an externally threaded stem which is threaded into and passes through...
4320652 Intake air density sensor for an internal combustion engine  
An intake air density sensor for an internal combustion engine comprises a receptacle in the form of a flask including a spherical chamber and a tubular portion having a very fine diameter, a...
4317361 Gas density detecting device for use in internal combustion engine  
A gas density detecting device for use in an internal combustion engine is disclosed. The device comprises a bellows having a selected gas sealed therein, a guide mechanism provided in the bellows...
4263804 Apparatus for directly measuring density altitude in an aircraft  
The invention resides in apparatus for directly measuring density altitude in an aircraft and includes a housing in communication with ambient conditions of air temperature, pressure and humidity...
4215565 Method and apparatus for testing a fluid  
A method of testing a fluid is disclosed which comprises passing a main flow of a fluid through a conduit; inserting into said conduit a probe having an inlet opening which faces downstream of the...
4170892 Method of and apparatus for the analysis of gases  
The mean molecular velocity or molecular weight of an unknown gas is determined by admitting the gas at a constant flow rate into an evacuated chamber of known volume, the gas being permitted to...
3899878 Apparatus for indicating gas temperatures  
Apparatus for producing a signal indicative of the temperature of a heated gas comprising the beta particle source; a beta particle detector which intercepts particles emitted from said source;...
3726128 DENSITY MEASURING INSTRUMENT HAVING ELECTROMAGNETIC SUSPENSION WITH A VARIABLE SPRING CONSTANT  
An electric coil is provided for the purpose of carrying alternating current. An electrically conducting sphere placed within the magnetic field of the coil incurs eddy currents resulting in...
3618061 MONITORING APPARATUS FOR MONITORING THE DENSITY OF A MATERIAL CARRIED BY A FLUID AND THE FLOW OF THE FLUID  
An improved monitoring apparatus for sensing the density of a material carried by a fluid in a conduit and the flow of the fluid to activate a warning device when the density of the material or...
3581556 DENSITY MEASURING INSTRUMENT  
A high precision instrument or gauge is provided for measuring the density of a gas. The gauge includes a buoyant sensing member and forms an active portion of an electric feedback circuit. The...
3550430 FORCE BALANCES  

Matches 1 - 50 out of 74 1 2 >