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| Number | Title | Issue Date |
| 7316700 | Self optimizing lancing device with adaptation means to temporal variations in cutaneous properties A lancing device, an embodiment of which controls the advancement and retraction of a lancet by monitoring the position of the lancet in conjunction with a lancet controller which incorporates a feedback loop for modulating the lancet driver to follow a predetermine... | 01/08/2008 |
| 7212009 | Fluid detection cable A fluid detection cable is described for use in detecting the presence of leaks in areas where a particular fluid is not desired. Sensing leads in the fluid detection cable have a center conductor that may be surrounded with a non-porous conductive polymer coating t... | 05/01/2007 |
| 7207219 | Rod-shaped element for liquid level detection and corresponding device for liquid level detection A metal rod-shaped element for a liquid detecting device is essentially cylindrical and has first and second ends. In at least one length, starting from the second end, the element has an isolating coating and an electrode strip is provided which extends along a lon... | 04/24/2007 |
| 7130780 | Method and instrument for electronically recording and imaging fluid washover via measuring characteristics of the fluid at multiple locations simultaneously An array of electrically isolated electrode pairs in combination with a specially configured processor, e.g., a personal computer, is employed to obtain a continuous real-time acquisition, processing, mapping and visualization of fluid washover. In a specific applic... | 10/31/2006 |
| 7106067 | Calibration plug for invasive and non-invasive electrodeless conductivity sensors and methods of using the same calibration plug A calibration plug provides resistance simulation for calibrating toroidal conductivity sensors. This calibration plug includes a resistive element of predetermined electrical resistance coupled in series between electrical leads which may be engaged with a circuit ... | 09/12/2006 |
| 7081759 | Fluid detection cable A fluid detection cable is described for use in detecting the presence of leaks in areas where a particular fluid is not desired. Sensing leads in the fluid detection cable have a center conductor that may be surrounded with a non-porous conductive polymer coating t... | 07/25/2006 |
| 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 |
| 7078909 | Flow-through conductivity sensor An improved flow-through conductivity sensor is provided. The sensor includes a current return path that has a current return conductor. At least one toroid of the sensor is removed from the flow path and configured to interact with the current return conductor to p... | 07/18/2006 |
| 7070476 | In-situ metalization monitoring using eddy current measurements during the process for removing the film A method for measuring conductance of a sample using an eddy current probe with a sensing coil. The method includes N repetitions of measuring first and second voltage pairs including in-phase and quadrature components of an induced AC voltage in the sensing coil, c... | 07/04/2006 |
| 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 |
| 7005857 | Device for measuring blood coagulation and method thereof A device and method for measuring clotting times in a fluid, typically blood, within a microchannel, with the onset of clotting being determined by measurement of the rate of change, or the value, of capacitance or impedance between two electrodes situated on either... | 02/28/2006 |
| 6995563 | Nonmetallic process connection A sensor includes primary and secondary toroids disposed in spaced, coaxial relation to one another with a process flow path extending therethrough. Electrically conductive and non-metallic connectors are located at opposite ends of the flow path to physically conta... | 02/07/2006 |
| 6885196 | Biosensor A highly sensitive biosensor that uses a smaller amount of sample for measurement is described. The biosensor includes a first insulating base plate having a working electrode, a second insulating base plate having a counter electrode opposed to the working electrod... | 04/26/2005 |
| 6815488 | Process for producing thermoplastic resin composition A process for producing a thermoplastic resin composition is disclosed and comprises melt-kneading a resin composition containing from 40 to 90 parts by weight of (A) a polyamide resin, from 5 to 50 parts by weight of (B) a polyphenylene ether resin, from 5 to 30 pa... | 11/09/2004 |
| 6811663 | Microelectrode system A microelectrode system suitable for use in preparative and analytical chemistry having a laminated structure with one or more apertures. In one embodiment a microelectrode system (1) comprises alternating layers of conductor (3) and dielectric (or ins... | 11/02/2004 |
| 6781389 | Conductivity sensor for detecting conductivity of a fluid A conductivity sensor (16) and control circuit (18) for determining the conductivity of a fluid is provided. Conductivity sensor (16) is formed of a first annular electrode (24) spaced apart from a second annular electrode (26) hav... | 08/24/2004 |
| 6777947 | Sensor cable A cable suitable for detecting the presence of corrosive liquids is disclosed. In an embodiment the cable includes two sensing wires wrapped around a core member, at least one of the sensing wires being surrounded by a non-conductive surface layer. In an alternate e... | 08/17/2004 |
| 6720773 | 4-electrode conductivity sensor with zero external field A conductivity sensor configuration which has essentially no external electrical field so that the calibration of the sensor is not affected by the existence of nearby external objects or fouling on the exterior parts of the sensor. Additionally, the sensor is relat... | 04/13/2004 |
| 6483325 | Means of correcting a measurement of a property of a material with a sensor that is affected by a second property of the material A sensor apparatus and electrode configuration within the sensor apparatus for measuring electrical characteristics of an aqueous fibrous composition. The electrode configuration includes an elongated ground electrode and at least one segmented electrode ... | 11/19/2002 |
| 6414493 | Toroid conductivity sensor A inductive conductivity sensor for measuring conductivity of a fluid includes a housing supporting a controlled impedance loop and a transducer. The transducer includes a driver for inducing a first current into the fluid adjacent the housing, and for in... | 07/02/2002 |
| 6400159 | Orientation sensor especially suitable for use in an underground boring device An orientation sensor especially suitable for use in an underground device is disclosed herein. This orientation sensor includes a sensor housing defining a closed internal chamber, an arrangement of electrically conductive members in a predetermined posi... | 06/04/2002 |
| 6133740 | Chlorine specific gas chromatographic detector A method and apparatus are set forth which enables a gas chromatographic column output to be connected with a pulse discharge chamber in which chemically bound chlorine in volatile organic or inorganic samples is measured. A spark discharge is formed in t... | 10/17/2000 |
| 6122956 | Method and apparatus for monitoring concentration of a slurry flowing in a pipeline An on-line sensor for measuring volumetric concentration or percent solids of a slurry flowing in a pipeline includes a section of composite or dielectric pipe connected in the pipeline, with a plurality of sensing electrodes mounted around the periphery ... | 09/26/2000 |
| 6084393 | Scour probe assembly A scour probe assembly comprises an elongated rigid tubular member of eleically insulative material, an anchoring structure fixed to a distal end of the tubular member, and a signal transmission device mounted on the tubular member. A pair of substantial... | 07/04/2000 |
| 5882598 | Wafer gap conductivity cell for characterizing process vessels and semiconductor fabrication processes and method of use A conductivity cell for use in determining ionic concentrations in the gap between two semiconductor substrates or wafers. The wafer gap conductivity cell is composed of two flat electrodes separated by a fixed gap. The electrodes are fabricated from wafe... | 03/16/1999 |
| 5789665 | Oil quality sensor for use in a motor Method and apparatus for determining deterioration of e.g. lubricating oil by measuring the electrical properties of a polymeric matrix (support) holding charged ionic groups. The dynamic range of the device is increased by creating a local polar environm... | 08/04/1998 |
| 5767683 | System for detecting compounds in a gaseous sample using photoionization, electron capture detection, and a constant current feedback control circuit which responds to compound concentration A detection system measures very small concentrations of compounds of interest within gaseous samples. A spark discharge system induces pulsed spark discharges across a pair of electrodes within an inert gas in a gas flow chamber. Various reactions are in... | 06/16/1998 |
| 5519323 | Integrable conductivity measuring device A conductivity measuring device has a current source device connected to current supply elements through which a substantially square-wave current can be fed into a liquid, and a measuring circuit for determining the voltage drop in the liquid between v... | 05/21/1996 |
| 5517181 | Hazardous fluid leak detector A device or system for monitoring for the presence of leaks from a hazardous fluid is disclosed which uses two electrodes immersed in deionized water. A gas is passed through an enclosed space in which a hazardous fluid is contained. Any fumes, vapors, et... | 05/14/1996 |
| 5497091 | Surface mounted pH sensor for cone penetration testing A surface-mounted pH sensor provides continuous pH profiling with depth during standard cone penetration testing (CPT). The pH sensor includes at least two electrodes, one being an antimony electrode and the other being a ceramic electrode. The electrodes... | 03/05/1996 |
| 5489849 | High accuracy calibration-free electrical parameter measurements using differential measurement with respect to immersion depth An apparatus and method for measuring electrical parameters of a medium such as electrical conductivity and dielectric constant between a pair of electrodes are disclosed. The medium can be a liquid, gas, powder, etc., and the electrodes can be coaxial me... | 02/06/1996 |
| 5483166 | Electrochemical test cell for conductivity and transport measurements An electrochemical test cell for measuring conductivity and transport properties of a solid or liquid electrolyte comprises a longitudinal chamber, produced, e.g., from a syringe, a pair of electrodes and means for holding the electrodes which defines an ... | 01/09/1996 |
| 5435170 | Method and apparatus for fluid quality sensing A method and apparatus for determining the quality of a lubricant by its solvating effect on an insoluble (resin) matrix to which charged groups have been covalently bound. The solvating effects are measured electronically as a variation in conductivity o... | 07/25/1995 |
| 5196801 | Capacitance-type fuel sensor for sensing methanol in methanol-mixed fuel A fuel sensor for sensing methanol in methanol-mixed fuel, which comprises a structure which defines a fuel passage through which the mixed fuel flows, an electrode assembly including a pair of probe portions which are exposed to the fuel passage, and an ... | 03/23/1993 |
| 5153519 | High voltage spark excitation and ionization detector system A spark detection apparatus is set forth and incorporates a closed chamber for receiving a carrier gas flowing therethrough between inlets and outlets, and the carrier gas is exposed to a pair of electrodes forming a spark across the chamber and through t... | 10/06/1992 |
| 5134376 | A solution specific conductivity meter and method for use A conductivity meter usable in solutions where the path of the electric lines of force between two electrodes is altered. In one embodiment, detachable guard rings alter the path length based upon their own conductivity. In another embodiment, the physica... | 07/28/1992 |
| 5098563 | Low pressure ion chromatograph for the analysis of cations A low pressure ion-chromatograph for the analysis of cations comprises eluent reservoirs, pump, sample injection valve, sampler, column, flow conductivity cell, electrical conductivity detector and recorder, wherein the pump is a low pressure electronic m... | 03/24/1992 |
| 5025220 | Continuous measurement of the absolute conductivity of a liquid A method and apparatus for measuring the electrical conductivity of a liquid comprises an electrically insulating housing through which the liquid flows, and four electrodes inserted into the path of the liquid flowing through the housing. The first and t... | 06/18/1991 |
| 4990855 | Conductivity probe for use in the presence of high intensity nuclear radiation A conductivity probe able to withstand high water temperatures and pressures, and intense nuclear radiation is suitable for use within the core of the nuclear reactor. The probe is made with a ceramic insulator, such as sapphire, and a central electrode t... | 02/05/1991 |
| 4939467 | Fuel sensor for sensing the mixture ratio of gasoline and methanol A fuel sensor for sensing a mixing ratio of a given liquid in a mixed fuel comprises a housing; a structure housed in the housing, the structure having a fuel passage formed therethrough; and an electrode assembly housed in the housing and held by the str... | 07/03/1990 |
