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| Number | Title | Issue Date |
| 7637148 | Liquid state detecting sensor A liquid state detecting sensor includes: a state detecting element including a heating resistor; an energization unit; a first output acquiring unit; a reference acquiring unit; a first calculating unit; a state detecting unit; a second output acquiring unit; a sec... | 12/29/2009 |
| 7493802 | Liquid type identification device There is provided an identification device capable of accurately, rapidly, and easily identifying a hydrocarbon-based liquid and alcohol-based liquid. An identification sensor unit (2) is arranged to face a flow passage (20) of a liquid to be measured ... | 02/24/2009 |
| 7405667 | Apparatus for determining type of liquid in a container and method for controlling the apparatus A technique for quickly determining the type of liquid in a container externally regardless of the material of the container, preferably contactlessly. A halogen heater 102 and an infrared thermopile 103 are disposed outside an electrically conductive ... | 07/29/2008 |
| 7377152 | Method and device for determining a characteristic value that is representative of the condition of a gas The invention relates to a device and methods for characterizating flowing substances, liquid or gas. The device includes: a transport duct with a heating or a cooling element; a temperature difference sensor having a temperature measurement cell downstream of the h... | 05/27/2008 |
| 7362105 | Integrated microstructure sensor element for detecting thermodynamic variables of a fluid An integrated microstructure sensor element is proposed for detecting thermodynamic measured variables of a fluid. To that end, a supporting body, particularly a board or a wafer having at least one microstructured heating element in contact with the fluid during op... | 04/22/2008 |
| 7246938 | Apparatus and method for measuring the heating value of gases A heating value meter for gases has an outer cylindrical mantle with an outer thermostatic heating apparatus and at least one inlet for introduction of air and at least one inlet for introduction of test or calibration gas. The outer mantle has an outer heating mant... | 07/24/2007 |
| 7194367 | Method and system for verification, calibration and simulation of a fuel cell test station A method and system for calibrating a fuel cell test station. The fuel cell test station has an interface for connection to at least one of a fuel cell, a fuel cell stack and a fuel processor to measure a plurality of physical characteristics associated therewith to... | 03/20/2007 |
| 7182509 | Nanoliter osmometer and method of operation The invention is an apparatus for determining a temperature at which a phase change occurs in a fluid sample, a method for measuring a temperature at which a phase change occurs in a sample and a sample cell. An apparatus for determining a temperature at which a pha... | 02/27/2007 |
| 7064562 | Temperature compensation method for soot sensor Certain characteristics of Diesel engine lubrication oil are determined. A sensor formed as a capacitor is immersed in the oil. An inductor is in series with the sensor, and a high frequency voltage with a varying frequency is applied to the resonance circuit formed... | 06/20/2006 |
| 7007549 | AC type flowmeter and method of mapping flow rate data for the same The present invention relates to a flowmeter suitable for a micro flow sensor. The flowmeter of the present invention comprises a resistive heater to be inserted into a fluid, AC power with a first frequency supplied to the resistive heater to periodically heat the ... | 03/07/2006 |
| 6834536 | Probe for measuring alcohol in liquids A probe (1) for quantitatively measuring volatile components of a liquid (2) includes a measurement gas space (3) separated from the liquid (4) by a permeation membrane (5). The membrane (5) is permeable for the volatile com... | 12/28/2004 |
| 6737274 | Comparator for time-temperature indicator A comparator for use with a time-temperature indicator wherein the time-temperature indicator includes an active portion having an initial color and which undergoes chemical changes as time elapses and at a rate related to the temperature of the surrounding environm... | 05/18/2004 |
| 6698278 | Indirect measurement of fuel concentration in a liquid feed fuel cell In an operating liquid feed fuel cell system, fuel concentration in the fuel stream can be calculated as a function of the observed current, the temperature of the fuel stream entering the fuel cell stack, and the temperature of the fuel cell stack itself... | 03/02/2004 |
| 6571611 | High temperature diesel fuel test apparatus and method Tortuous passageways are provided in a substrate component that is retained within a holding chamber. Fuels and fuel mixtures to be comparatively tested are introduced into the holding chamber and into the tortuous passageways of the substrate component. ... | 06/03/2003 |
| 6513367 | Method of monitoring engine lubricant condition A method for generating indicators relating to the condition of lubricating oil in an internal combustion engine. A set of variables relating to operation of the internal combustion engine serve as proxy variables for brake mean effective pressure develop... | 02/04/2003 |
| 6467950 | Device and method to measure mass loss rate of an electrically heated sample A device and a method for measuring the mass loss rate of a sample of combustible material placed on a mass-sensitive platform. The material has been formed into a block through which a heating wire has been inserted that thermally degrades the block when... | 10/22/2002 |
| 6401518 | Fluid filled electrical device with diagnostic sensor located in fluid circulation flow path A fluid filled transformer including a tank for containing at least primary and secondary windings, a radiator connected to the tank via top and bottom headers, a fluid disposed in the tank, a fluid circulation flow path including passages through the win... | 06/11/2002 |
| 6190036 | Method and apparatus for determining the concentration of a liquid ice mixture Method for determining the ice concentration in a liquid ice mixture (binary ice fluid), with the steps: separating a partial flow of the fluid and introducing and heating the partial flow into a heat exchange (16) until complete melting takes place, acco... | 02/20/2001 |
| 6169965 | Fluid property and flow sensing via a common frequency generator and FFT A method and apparatus for using a common frequency generator for measuring selected properties of a fluid of interest via one or more heater and/or sensor elements. The common frequency generator may sequentially and/or simultaneously provide input signa... | 01/02/2001 |
| 6079253 | Method and apparatus for measuring selected properties of a fluid of interest using a single heater element A method and apparatus for determining selected fluid properties including thermal conductivity, pressure and/or temperature using a single heater element of the sensor, and in a relatively short period of time. This is accomplished by measuring a variabl... | 06/27/2000 |
| 5992222 | High pressure pump system and method of operation thereof A pump system for producing high and exactly controllable pressure levels includes a piston pump which has a piston (32) connecting to a spindle shaft (22), a spindle nut (44) on said spindle shaft, a cylinder block (34) having a bore (36) for receiving s... | 11/30/1999 |
| 5959197 | System for determining free cement content A method and system for determining the free cement content of concrete plant waste water held in a pit or tank P in which the temperature of the water in the pit or tank and the temperature of water in a reference pit or tank R1, is measured b... | 09/28/1999 |
| 5814721 | Fluid boiling point analyzer The present invention provides an apparatus for use in indicating the boiling point of fluids across a wide temperature range which comprises a meter of the portable hand-held type including a probe for insertion vertically into a fluid for testing, with ... | 09/29/1998 |
| 5773709 | Method and apparatus for thermally inducing circulation of fluid between the interior of a system and a fluid pocket attached thereto A method and apparatus for inducing circulation of a fluid in an interior of a system between such interior and a fluid pocket. The fluid pocket is connected to a fluid access opening of the system for fluid communication between the fluid pocket and the ... | 06/30/1998 |
| 5747673 | Method for measuring with great precision the volume variation occurring when fluid phases mix in order to determine physico-chemical characteristics A containment cell with two chambers (7) in a thermostat-controlled enclosure (3) is used to measure separately, at determined pressure levels, the volumes occupied separately by fluid phases, prior to measuring at the same pressures the volume occupied b... | 05/05/1998 |
| 5708196 | Method and apparatus for determining the cloud point of oil The invention concerns a method and an apparatus for determination of the cloud point of oil. In the method according to the invention the cloud point is determined from a turning point on the oil cooling curve. The method of the invention may be realized... | 01/13/1998 |
| 5691206 | Method and device for solid phase microextraction and desorption A device for carrying out solid phase microextraction is a fiber contained in a syringe. The fiber can be solid or hollow. The syringe has a barrel and a plunger slidable within the barrel, the plunger having a handle extending from one end of the barrel.... | 11/25/1997 |
| 5415024 | Composition analyzer for determining composition of multiphase multicomponent fluid mixture A composition analyzer and a method of use for determination of the masses of individual components in a multiphase multicomponent fluid system containing a gas. Data and relationships not measured by the analyzer during operation but required by the meth... | 05/16/1995 |
| 5392639 | Apparatus and method for identifying and distinguishing different refrigerants Refrigerant type is identified and determined by storing in electronic memory indicia representative of saturation pressure/temperature characteristics of a plurality of differing refrigerant types. A liquid refrigerant sample of unknown type is obtained ... | 02/28/1995 |
| 5380091 | Indicating device A portable hand-held device (1) is provided for testing the boiling point of fluids, especially hydraulic fluid such as brake fluid. The device includes a probe (3) for immersion in fluid to be tested, in particular in a fluid reservoir, and the probe (3)... | 01/10/1995 |
| 5225334 | Method and apparatus for measuring concentration of solution or suspension using electrically heating method There is provided a circulating line branched from a solution or suspension tank and returning again to this tank through a pump (15) used to control the flow velocity at a constant level. A fluid temperature is measured by a sensor (16) in said tank or s... | 07/06/1993 |
| 5222390 | Crystallization analysis fractionization The composition distribution of a sample in solution is determined by basing the calculation of the composition distribution on intermittent measurements of the concentration of sample remaining in solution while precipitating the sample from the solution... | 06/29/1993 |
| 5020000 | Measuring dryness fraction This invention relates to the measurement of the dryness of steam supplied to steam-powered processes, and in particular to a method of making such measurements, and to methods of using the measured dryness fraction to obtain further information about the... | 05/28/1991 |
| 4677843 | Roller oven for testing fluids An oven for testing fluid samples to determine the effects of temperature and various chemical additives on the rheological, filtration and chemical properties of the sample under simulated circulating conditions comprises an environmental chamber having ... | 07/07/1987 |
| 4497200 | Method and device for evaluation and indication of wear condition of motor lubrication A method and a device are used for evaluating and indicating the wear conditions of a motor lubrication oil. The device comprises a motor oil temperature sensor, an electronic unit comprising a threshold detector and an analog circuit which receives a sig... | 02/05/1985 |
| 4458524 | Crude oil production stream analyzer A crude oil production stream analyzer includes a device which measures the dielectric constant of the crude oil production stream and provides a signal corresponding thereto. A densitometer provides a density signal representative of the density of the c... | 07/10/1984 |
| 4408902 | Method of and device for determining the boiling point of a liquid In order to determine the boiling point of a liquid, especially a nonaqueous one such as a brake fluid, a device suspended in a body of that liquid--e.g. in a reservoir supplying fluid to a brake cylinder--forms a narrow chamber which is downwardly open a... | 10/11/1983 |
| 4297873 | Plugging device Disclosed is a plugging device which comprises a plugging orifice having in a passage for a liquid metal a conical portion spreading out toward the upper-course side and a straight pipe portion extending from a small-diameter part of the conical portion a... | 11/03/1981 |
| 4295368 | Method for measuring the full range in quality of a vapor A method for determining the quality of a vapor wherein a representative sample is heated at constant volume to a superheated or compressedliquid state so that a measurement of the pressure and temperature in this state, in addition to knowing the pressur... | 10/20/1981 |
| 4281533 | Apparatus for measuring soot concentration in engine oil Both junctions of a thin film thermocouple are formed on one side of a glass substrate. That side of the substrate is exposed to the diesel engine oil the soot content of which is to be measured. A light source on the other side of the substrate has its r... | 08/04/1981 |
