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| Number | Title | Issue Date |
| 8054091 | Analysis of thin liquid films A novel microfluidic device has been developed to measure stability of thin liquid films of water in oil emulsions using electrochemical perturbation of interfaces. This new device can be utilized in rapid classification of de-emulsifiers used in petroleum industrie... | 11/08/2011 |
| 7990161 | Apparatus for measuring total acid number of oil and estimating lifetime of oil, and method for measuring total acid number of oil and oil sensor using the same Disclosed herein are an apparatus for measuring the total acid number of oil, an apparatus for measuring the lifetime of oil through the measurement of the total acid number of oil, a method for measuring the total acid number of oil, and a method of making measurem... | 08/02/2011 |
| 7940060 | Method for measuring the amount of air in a fluid One embodiment of the invention includes a method comprising measuring the level of a fluid in a system in a vehicle comprising measuring an electrical property of the fluid indicative of the amount of air in the fluid and comparing the measured electrical property ... | 05/10/2011 |
| 7928741 | Oil monitoring system An embodiment of the present invention provides for a sensing element comprising a non-conductive housing with three chambers for detecting oil conductivity, additive depletion and oxidation, and water contamination, respectively. Through the monitoring of an array ... | 04/19/2011 |
| 7830161 | Methods for measurement of fluid electrical stability The invention relates particularly to methods and apparatuses for characterizing water-in-oil or invert emulsion fluids for use in drilling well bores in hydro-carbon bearing subterranean formations. A fluid stability measurement method is described. The method incl... | 11/09/2010 |
| 7701229 | Methods and systems for measurement of fluid electrical stability The invention relates particularly to methods and apparatuses for characterizing water-in-oil or invert emulsion fluids for use in drilling well bores in hydro-carbon bearing subterranean formations. A fluid stability measurement device is disclosed. The device comp... | 04/20/2010 |
| 7521945 | Oil monitoring system An embodiment of the present invention provides for a sensing element comprising a non-conductive housing with three chambers for detecting oil conductivity, additive depletion and oxidation, and water contamination, respectively. Through the monitoring of an array ... | 04/21/2009 |
| 7504836 | Device for measuring the quality and/or degradation of a fluid, particularly a food oil The invention relates to a device for measuring the quality and/or degradation of a fluid, especially an oil, comprising a sensor consisting of at least one pair of electrodes which are distanced from each other. Said sensor is immersed in the fluid which is to be m... | 03/17/2009 |
| 7391225 | Carbon nanotube sensor and apparatus and method for detecting change time of engine oil for automobile using the same A system and method for determining the time to change the oil of an automobile engine including a power source unit for converting power into necessary power and supplies power at the startup time. A degradation detection unit is installed in an engine oil chamber ... | 06/24/2008 |
| 7362110 | Measurement cell for liquids A cell for the measurement of resistivity and/or permittivity of a liquid, under variable ac frequency energizing, preferably includes a first set of n+1 metal plates interleaved with a second set of n places, both sets of plates preferably being of the same size an... | 04/22/2008 |
| 7355415 | Method for on-line monitoring of condition of non-aqueous fluids A method for determining a condition of a highly resistive fluid in transportation and industrial equipment. The method is suitable for determining the condition of a non-aqueous fluid including applying a high-frequency voltage signal between electrodes immersed in... | 04/08/2008 |
| 7323887 | Conductivity sensor and manufacturing method therefor A contacting-type conductivity sensor includes a plurality of electrodes disposed on a distal surface of a substrate. The substrate includes a plurality of vias through which electrical interconnection to the electrodes is accomplished. The conductivity sensor can e... | 01/29/2008 |
| 7299682 | Method and apparatus for estimating basicity of a used, all-loss cylinder lubricant A method and apparatus for determining the total base number of a used lubricant from an open, all loss, lubricating system. An AC voltage signal is applied between electrodes immersed in the used lubricant and a used-lubricant dependent response to the applied sign... | 11/27/2007 |
| 7275420 | Fluid sensor fixture for dynamic fluid testing A system that facilitates measurement, analysis, and automatic maintenance of fluid comprises a fluid, and a casing that includes a plurality of apertures is immersed in the fluid. The apertures are opened to permit the fluid to enter the casing and closed to confin... | 10/02/2007 |
| 7259575 | Method for on-line fuel-dilution monitoring of engine lubricant A method for determining a fuel-dilution condition of a lubricant used in transportation and industrial equipment. The method uses apparatus that applies a high frequency and optionally a low frequency oscillating signal to electrodes immersed in the fluid and quant... | 08/21/2007 |
| 7253644 | Apparatus and method for measuring electrochemical and viscoelastic properties of a liquid An apparatus for measuring electrochemical and viscoelastic properties of a liquid includes two sensing components, an electrochemical impediance spectroscopy component and a quartz crystal microbalance component positioned within a housing for receiving a liquid fo... | 08/07/2007 |
| 7239155 | Electrochemical impedance measurement system and method for use thereof Disclosed is a method and apparatus for an electrochemical impedance measurement, and in particular circuitry and components employed for such measurements. The system employs an injected broadband AC signal to produce an associated response signal. The subsequent a... | 07/03/2007 |
| 7228735 | Fluid sensing device with integrated bypass and process therefor A micromachined fluid sensing device and a method for its fabrication. The sensing device incorporates a bypass passage, preferably an integral bypass passage within the device, that enables a volume of fluid to be delivered to the device, with a limited portion of ... | 06/12/2007 |
| 7201051 | Method for detecting fuel in oil of an internal combustion engine A method for detecting fuel leaking into an oil pan containing oil which is used to lubricate an internal combustion engine utilizes a plurality of sensors. The method includes the step of measuring a plurality of parameters of the oil using each of the plurality of... | 04/10/2007 |
| 7199595 | Fluid quality control using broad spectrum impedance spectroscopy A system and method for monitoring and controlling the properties of fluids is disclosed. The inventive concept employs impedance spectroscopy (IS) measurements, and is suitable for real-time, in situ, monitoring and quality control operations, such as quality contr... | 04/03/2007 |
| 7173438 | Measuring capacitance A method for determining capacitance includes alternately charging a capacitor to a first voltage and discharging the capacitor to a second voltage, generating an output signal having a frequency that is a function of a time period, and determining the capacitance b... | 02/06/2007 |
| 7151383 | Oil condition sensor An oil condition sensor is proposed which can accurately determine the degree to which oil is contaminated with metallic powder. It includes a permanent magnet and a sensor head provided around the permanent magnet. The sensor head includes a cup-shaped electrode an... | 12/19/2006 |
| 7148611 | Multiple function bulk acoustic wave liquid property sensor A multifunction sensor based on a bulk acoustic wave (BAW) device can be used to obtain measurements of a liquid's corrosivity, viscosity, and conductance. A front electrode and a back electrode can be used to excite vibrations in a piezoelectric substrate. Vibratio... | 12/12/2006 |
| 7135870 | Device for determining the composition of a fluid mixture A method and apparatus are disclosed for determining the concentration of individual components within a fluid mixture by determining the permittivity of the individual components. The method and apparatus use a reference sensor and at least one measurement sensor p... | 11/14/2006 |
| 7112973 | Oil condition sensor An oil condition sensor includes rod-shaped electrodes and an opposed cup-shaped electrode. The rod-shaped electrodes are connected to a first power supply through first fixed resistors having a predetermined threshold. The voltage from the first power supply is app... | 09/26/2006 |
| 7109729 | Method for analysis of a working fluid using impedance spectroscopy An on-line method for determining the condition of low conductivity working fluids using alternating current, electro-impedance spectroscopy is provided by making measurements over a range of frequencies at temperatures at or above 50° C. ... | 09/19/2006 |
| 7106075 | Online fluid contaminant detector A method for detecting extraneous matter in a fluid including the steps of applying an energy source to electrodes located in a fluid, measuring real and imaginary electrical impedance values across the electrodes for a plurality of different frequencies of alternat... | 09/12/2006 |
| 7086280 | Aeration sensing device A system for detecting aeration in a lubricant includes a sensor having a pair of spaced apart concentric rings forming a first capacitor through which the lubricant flows and a capacitor segment forming a second capacitor with the outer ring. The capacitors are con... | 08/08/2006 |
| 7078910 | Fluid formulation evaluation and improvement utilizing broad spectrum impedance spectroscopy A method and apparatus for evaluating and improving the properties of fluid formulations is disclosed. The inventive concept employs impedance spectroscopy (IS) measurements and data analyses to determine IS parameters of fluids representative of a fluid formulation... | 07/18/2006 |
| 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 |
| 7057400 | Fluid conductivity measuring cell The invention relates to a fluid conductivity measuring cell having two cylindrical and coaxial electrodes mounted head-to-tail and axially overlapping on the same insulative body, the inner electrode, penetrating partly into the at least partly hollow outer electro... | 06/06/2006 |
| 7054776 | Apparatus for use in calibrating a VNA A method and apparatus are used to calibration a Vector Network Analyzer (VNA). The method includes providing a calibration module with a single port, providing within the calibration module a set of reflecting components with known scattering parameters, providing ... | 05/30/2006 |
| 7051967 | Reel unit for spinning reel A reel unit for a spinning reel includes a reel body, a rod attachment leg that is formed integrally with the reel body, and a reinforcing member that is coupled to the reel body by being mounted opening. The rod attachment leg has an accommodation space that opens ... | 05/30/2006 |
| 7049831 | Fluid quality control using broad spectrum impedance spectroscopy A system and method for monitoring and controlling the properties of fluids is disclosed. The inventive concept employs impedance spectroscopy (IS) measurements, and is suitable for real-time, in situ, monitoring and quality control operations, such as quality contr... | 05/23/2006 |
| 7019654 | Contact potential difference sensor to monitor oil properties A method and system for contact potential sensing of dielectric properties of a fluid. The method and system include a contact potential sensor, an open or closed loop for passing a fluid past the sensor, measuring a contact potential to characterize dielectric prop... | 03/28/2006 |
| 6992494 | Method and apparatus for monitoring the purity and/or quality of steam A method and apparatus for monitoring at least one of steam purity and steam quality for steam used in a decontamination process. A capacitor is exposed to the steam, wherein the steam acts as a dielectric between the plates of the capacitor. Permittivity of the die... | 01/31/2006 |
| 6989676 | Apparatus and method for sensing particle and water concentrations in a medium A method and apparatus for detecting soot and/or water concentrations in diesel engine oil having a dielectric constant may include a device for measuring a change in the dielectric constant at a first frequency, a device for measuring a change in the dielectric con... | 01/24/2006 |
| 6989680 | Detection of coolant contamination in lubricating fluids An impedance spectroscopy technique and system for detecting in real time engine coolant contamination in lubricant. A probe is disposed in the lubricant and the probe excited with an a.c. voltage frequency sweep over a selected frequency range. The current and curr... | 01/24/2006 |
| 6984993 | Method and apparatus for making high-precision measurements A method and apparatus for measuring a predetermined parameter, by providing a displaceable sensor on a mounting member such that the displaceable sensor changes in location, form or length with respect to the mounting member in accordance with the predetermined par... | 01/10/2006 |
| 6984986 | Situ fluid condition monitoring A database is compiled of values of the frequency fNM corresponding to the minimum reactance Z″MIN (Nyquist minimum) versus temperature TL over a selected range of temperatures for a probe immersed in a sample of the fluid to be mo... | 01/10/2006 |
