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| Number | Title | Issue Date |
| 7545148 | Electrochemical sensor In an electrochemical sensor, the potential difference applied to the electrochemical cell is raised to a measuring value at a rate determined to reduce the transient current. The maximum rate of change of the voltage is set to prevent saturation of an IE converter.... | 06/09/2009 |
| 7492161 | Nanosized electrical probe for measuring electrical signal of charged colloidal particles, and device of measuring electrical signal of charged colloidal particles using the same The current invention relates to a nanosized electrical probe for measuring an electrical signal of charged colloidal particles, and a device for measuring an electrical signal of charged colloidal particles using the same, thus exhibiting excellent effects on measu... | 02/17/2009 |
| 7436187 | Conductance control for detecting foam and/or an unstable fluid line A method and apparatus is provided for detecting and responding to foaming of a fluid being heated, and more particularly, for operating a device having a container with fluid therein, wherein a resistance of an electrical path from a probe is measured through the f... | 10/14/2008 |
| 7372005 | Water storage device having a powered anode A water heater having a powered electrode and a method of controlling the water heater. The water heater includes a tank to hold water, a heating element, an electrode, and a control circuit. The control circuit includes a variable voltage supply, a voltage sensor, ... | 05/13/2008 |
| 7341694 | Ammonia sensor In an ammonia sensor (1), lead portions (7) and (9) are provided on an insulating substrate (5); a pair of comb-shaped electrodes (11) and (13) are connected to the lead portions (7) and (9), respectively; a se... | 03/11/2008 |
| 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 |
| 7291310 | Microsystem for determining clotting time of blood and low-cost, single-use device for use therein A microsystem for determining clotting time of blood and a low-cost, single-use device for use therein are provided wherein the device has no moving parts or expensive optical sensors or magnets. The device includes a microfluidic channel and a microsensor at least ... | 11/06/2007 |
| 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 |
| 7259566 | Micro sensor system for liquid conductivity, temperature and depth In accordance with the present invention is a miniature planar oceanographic conductivity, temperature pressure (CTD) system based on a thin film material fabricated on a Liquid Crystalline Polymer (LCP). The micro-CTD system in accordance with the present invention... | 08/21/2007 |
| 7249573 | Pressurized steam boilers and their control A method of controlling the operation of a pressurised steam boiler (50) heated by a burner (20), which includes the steps of a) monitoring the level of water in the boiler (50), b) monitoring the pressure of steam in the boiler (50), c) ... | 07/31/2007 |
| 7238267 | Self-condensing pH sensor The present invention pertains to an apparatus and a means of constructing a pH sensor that can detect changes in pH levels of humidified gases and liquid samples. When electronically connected to a computerized or analog display means, sensitive quantitative measur... | 07/03/2007 |
| 7237430 | Method and apparatus for enhanced detection of a specie using a gas chromatograph The invention includes a method and apparatus for a chromatography system having a chromatographic column for separating gases in a mixture from one another and an electrochemical gas sensor coupled to the chromatographic column for detecting a gas being emitted fro... | 07/03/2007 |
| 7233226 | Method of producing a platinum temperature sensor A Platinum temperature sensor comprises a ceramic substrate and a platinum thin-film resistor applied to said ceramic substrate, a ceramic cover layer and a connecting layer generated from a ceramic green layer by pressure and temperature treatment. The ceramic cove... | 06/19/2007 |
| 7176692 | Measuring probe for potentiometric measurements A measuring probe for potentiometric measurements has a housing (2) formed of an electrically insulating material that encloses at least one hollow space (8, 10) containing a half-cell element defining a first electrode. At least one additional electro... | 02/13/2007 |
| 7166201 | Self-condensing pH sensor The present invention pertains to an apparatus and a means of constructing a pH sensor that can detect changes in pH levels of humidified gases and liquid samples. When electronically connected to a computerized or analog display means, sensitive quantitative measur... | 01/23/2007 |
| 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 |
| 7144488 | Electrode, electrochemical cell, and method for analysis of electroplating baths A counter electrode for use in an electrochemical cell suitable for analysis of an electroplating composition, the counter electrode comprising a conductor; a sheath disposed about the conductor; an electrolyte disposed within the sheath; and an optionally porous el... | 12/05/2006 |
| 7126343 | Conductivity probe with toroid keeper An apparatus and associated process for constructing a conductivity probe are disclosed. The conductivity probe includes at least two magnetic circuits in toroidal shape. Each of these “toroids” includes a ferrite core around which is wrapped a conductive wire (... | 10/24/2006 |
| 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 |
| 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 |
| 7104116 | 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... | 09/12/2006 |
| 7088115 | Electrochemical impedance spectroscopy system and methods for determining spatial locations of defects A method and apparatus for determining spatial locations of defects in a material are described. The method includes providing a plurality of electrodes in contact with a material, applying a sinusoidal voltage to a select number of the electrodes at a predetermined... | 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 |
| 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 |
| 7068053 | 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 positional rela... | 06/27/2006 |
| 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 |
| 7043967 | Sensor device for monitoring the condition of a fluid and a method of using the same The present invention is a compact apparatus and method that provides an efficient manner for monitoring the condition and level of a functional fluid directly in operating equipment. A sensor device is provided that includes a plurality of liquid sensors and a plur... | 05/16/2006 |
| 7043402 | On-line oil condition sensor system for rotating and reciprocating machinery An on-line sensing system and method for monitoring in real-time thermal-oxidative breakdown, water contamination, and/or fuel dilution conditions in operational engine lubricating oils. The method of the invention includes an electrochemical impedance analysis tech... | 05/09/2006 |
| 7043372 | Fluid condition monitoring using broad spectrum impedance spectroscopy Impedance spectroscopy is used to determine values associated with properties of a substance such as a fluid. In some embodiments, the present invention is applied to engine lubricants. A spectral matrix is constructed that comprises data taken from spectral plots. ... | 05/09/2006 |
| 7041946 | Energization cycle counter for induction heating tool An induction heat treating process with a remote sensor for monitoring the duration of energization of an induction heating coil each time the induction heating coil is consecutively cycled. An identifying tag is preferably attached to, embedded within the induction... | 05/09/2006 |
| 7038459 | Oil deterioration detection apparatus An oil deterioration detection apparatus includes a sensor, an evaluation circuit, and a malfunction detecting circuit. The evaluation circuit has a determination circuit. The malfunction detecting circuit has a resistor and a switch. The evaluation circuit evaluate... | 05/02/2006 |
| 7006929 | Signal detecting sensor provided with multi-electrode A sensor capable of simply and quickly measuring the electrical activities of a number of cells simultaneously and a device comprising the sensor and capable of detecting the signal transmission between subject cells are provided. The sensor comprises a plurality of... | 02/28/2006 |
| 6965098 | Energization cycle counter for induction heating tool An induction heat treating process with a sensor for monitoring the duration of energization of an induction heating coil each time the induction heating coil is consecutively cycled. The sensor is preferably a counting mechanism attached to or embedded within the i... | 11/15/2005 |
| 6930486 | Conductivity sensor A conductivity probe having a modular design. A probe body has a distal end and a proximal end. The distal end includes a recessed portion for providing a seat for an O-ring that seals an electrode tip assembly. The probe body also includes a set of internal threads... | 08/16/2005 |
| 6922064 | Fluid quality test method based on impedance A system for determining a quality of a fluid includes an impedance cell immersed in the fluid and impedance instrumentation that communicates with the impedance cell. A controller measures a first impedance of the fluid using an electrical signal at a first frequen... | 07/26/2005 |
| 6903560 | 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 positional rela... | 06/07/2005 |
| 6894502 | pH sensor with internal solution ground The invention relates to an internal solution ground for primary use with a pH sensor, and preferably with a multi-sensing instrument monitoring a pH sensor and one or more additional secondary sensors having non-isolated circuits. In one aspect, a pH sensor assembl... | 05/17/2005 |
| 6861843 | Safe fluid detection in AC powered devices An AC powered device detecting the presence of a conducting fluid using a source of detecting current through the fluid other than a grounded supply. All paths between the source of current and the fluid include large impedances, termed protecting impendances. The p... | 03/01/2005 |
| 6836123 | Sensor for electro-active materials A sensing device is featured that electrochemically measures methanol concentration. The sensing device has a flexible composite of layered materials wrapped about a flexible tube having aperture contact with a methanol flow stream. The layered materials sequentiall... | 12/28/2004 |
| 6771074 | Probe assembly for a fluid condition monitor and method of making same A probe assembly for use in monitoring fluid conditions in real time in a transducer utilizing impedance spectroscopy and having two closely spaced tubular concentric electrodes. The electrodes have a surface area of about 8.1 to 10.8 cm2 spaced in the ra... | 08/03/2004 |
