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6850077 |
Method for measuring a characteristic of a conductive target material using a proximity probe
A digital eddy current proximity system including a digital impedance measuring device for digitally measuring the proximity probes impedance correlative to displacement motion and position of a...
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6831470 |
Methods and apparatus for estimating on-line water conductivity of multiphase mixtures
A method and apparatus is disclosed for estimating brine water conductivity in a multiphase mixture of brine water and other substances by combining measured mixture permittivity and conductivity...
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6831471 |
Configurable interface circuit for exhaust gas oxygen sensors
An oxygen sensor interface circuit is configurable on the fly by an electronic controller such as an engine controller to support oxygen sensors having unique interface requirements, to reliably...
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6828808 |
Long-life conductivity sensor system and method for using same
A long-life conductivity sensor system and method that is embeddable or immersible in a medium. The conductivity sensor system includes at least a housing with an enclosing wall that defines an...
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6819120 |
Non-contact surface conductivity measurement probe
A non-contact probe for determining the conductivity of coating materials is disclosed. The probe includes a free running oscillator operating at a selected frequency, a sensor made up of an LC...
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6807843 |
Gas sensor
The gas sensor may be an apparatus for sensing a proportion of a gas in a gas mixture. A gas sensor may have a sampling element slidably engaged with a sensor element. The sensor element may have a...
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6801039 |
Apparatus and method for measuring mud resistivity using a defocused electrode system
A mud resistivity measuring device for use in a borehole includes a pair of current electrodes disposed between a pair of guard electrodes. The measure electrodes are carried on a recessed portion...
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6794886 |
Tank probe for measuring surface conductance
A highly sensitive, non-contact tank probe to measure surface conductance of thin film structures, and a method for using the same, are described. The tank probe includes inductor (L), capacitor...
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6763263 |
Method and apparatus for producing an electrical property image using a charge correlation matrix
An electrical property imaging system includes an array of sensors placed around an object to measure the surface charges thereon as a sinusoidal voltage is applied thereacross. The resulting...
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6741084 |
Device for measuring the oxidizable carbon of a liquid and a method for the use thereof
The present invention provides a device useful in the photo-oxidation of a sample liquid and in the measurement of the oxidized carbon content thereof. The device includes a cell, at least two...
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6734674 |
Method for locating and inspecting underground or other non-visible non-electrically conductive pipes
A method for locating and inspecting underground or other nonvisible, non-electrically conductive pipes. An electrolyte is introduced into the pipe and a time varying electrical signal is applied...
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6696844 |
Apparatus and method for real time determination of materials' electrical properties
Apparatus for ablating organic material, such as tissue, during an EP procedure generates a monitor signal to provide unambiguous indicia of real time characteristics of the ablation site prior to,...
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6693443 |
Systems for detecting and measuring inclusions
The present invention relates to systems of methods of detecting and measuring inclusions in liquid metals. More particularly, non-metallic inclusions having a conductivity level different from the...
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6690173 |
Circuit and method for measuring the conductivity of an aqueous sample
A circuit and method for measuring the conductivity of an aqueous sample, as used in an improved instrument for measuring the total organic carbon content of water, provides substantially...
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6680618 |
Leak sensing switch
A low-cost leak sensor that prevents leakage current from flowing between electrodes when moisture is deposited. A leak sensor is formed on an insulating substrate. The leak sensor has a through...
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6664776 |
Method and system for voltammetric characterization of a liquid sample
Parallel measurements on a plurality of working electrodes E 1 -E 4 during the same pulse-sequence permits voltammetric characterization by, during each cycle of a predetermined pulse-sequence,...
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6657439 |
Sheet resisitance meter
A sheet resistance meter includes a sensor head for generating a magnetic field; and an amplifier for, when a semiconductor wafer, an object to be measured, is placed at a predetermined distance...
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6650128 |
Method and apparatus for circuit fault detection with boiler water level detection system
A fault detection circuit in a boiler-water level system includes a dual-frequency signal generator which develops two AC components with no associated DC component. The two frequencies are mixed...
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6639401 |
Contactless, transformer-based measurement of the resistivity of materials
The present invention provides an apparatus and method for measuring the resistivity of a sample of cement-based material. A transformer is formed with a primary coil, a secondary formed by means...
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6630835 |
Apparatus and method for high throughput electrorotation analysis
The present invention concerns a high throughput electrorotation chip having an array of electrorotation units and methods of use thereof. To make the high throughput electrorotation chip, a...
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6605947 |
Cup shape sensible container for detecting liquid property
A sensible container for measuring conductive parameters in the liquid and acquiring properties of water in the liquid, consists of: a seat; a cup body installed at the seat, at least one probe...
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6593747 |
Method and apparatus for monitoring adsorbent activity in situ
The present invention is directed to a method and apparatus of determining the degree of saturation of a decontamination-removing substance or adsorbent such as an alumina absorbent or activated...
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6499338 |
Moisture management of textiles
Moisture management indexes are determined for a textile sandwiched between two plates. Electrical conductors arranged in concentric opposing pairs are used to measure changes in electrical...
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6489785 |
Comparative contactless conductivity detector
A comparative conductivity detection system includes a sample channel assembly and a reference channel assembly. The sample channel assembly includes a sample-fluid channel, a drive electrode, and...
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6448793 |
Adaptive manufacturing of semiconductor circuits
The present invention relates to a process for implementing a base circuit design with configurable modifications to compensate for variations in component parameters due to material or processing...
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6439766 |
Diamond detecting apparatus and method
An apparatus and method for determining if a stone mounted in an electrically conductive mounting is a true diamond employs a housing to be held in one hand of a user while the other hand holds the...
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6429666 |
Capacitive circuit array for fingerprint sensing
A compact sensor which maps fingerprints for identification purposes. The sensor consists of an array of pixels with each pixel configured with one or more pickup conductive electrodes surrounded...
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6393714 |
Resistor arrays for mask-alignment detection
Described are mask-alignment detection structures that measure both the direction and extent of misalignment between layers of an integrated circuit using resistive elements for which resistance...
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6377052 |
Monitoring fluid condition through an aperture
A method for real time monitoring fluid in a vessel with a probe having a pair of electrodes immersed in the fluid. The disclosed probe has the electrodes arranged helically on a rod, sized and...
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6369589 |
Perforation corrosion prediction tool
A method for predicting perforation corrosion in a hem flange. The method includes placing an electrode in the hem flange. The electrode extends substantially the entire length of the hem flange....
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6328878 |
Adhesive tape sensor for detecting and evaluating coating and substrate degradation utilizing electrochemical processes
A portable and nondestructive adhesive tape corrosion sensor which is utilized under actual field or laboratory conditions in detecting coating and substrate degradation using Electrochemical...
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6313646 |
In-situ electrochemical-based moisture sensor for detecting moisture in composite and bonded structures
A hand-held or permanently attached corrosion sensor is described that uses electrochemical impedance spectroscopy (EIS, also known as AC impedance) to detect coating and structural degradation...
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6314373 |
Grid sensor for determining the conductivity distribution in flow media and process for generating measurement signals
A measurement device is disclosed for measuring the conductivity distribution in liquids or multiple phase media flowing in any direction. A grid sensor has electrodes shaped as parallel...
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6300778 |
Solder paste and residue
This invention relates to an on-line statistical process control device for solder paste and residues. The invention consists of electronics hardware, software, and probing systems. The electrical...
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6288528 |
Method and system for evaluating a condition of a combustion vessel
There is provided a method and system for evaluating a condition of a surface of a combustion vessel exposed to deposition thereon of a material released during a combustion of a fuel in the...
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6285179 |
Detecting apparatus and detecting method of absorbed hydrogen amount in hydrogen absorbing tank
This invention relates to a detecting method and a detecting apparatus for detecting an absorbed hydrogen amount in a hydrogen absorbing tank. An object of the present invention is to to provide a...
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6275049 |
Method and apparatus for the measurement of film formation temperature of a latex
Apparatus and methods for determining the minimum film formation temperature of a latex are disclosed based upon the measurement of the conductivity of the latex as the temperature of the latex is...
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6265884 |
Electrical conductivity gem tester
It has been learned that moissanite and other synthetic stones, including synthetic moissanite and synthetic diamond, are distinguishable from natural diamonds based on differing electrical...
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6265882 |
Apparatus and method for measuring the content of intramuscular fat in carcasses or parts thereof
The apparatus for measuring the intra-muscular fat in carcasses or parts of carcasses or the total content of fat in minced meat has a first pair of electrodes for insertion into a carcass or part...
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6253100 |
Method of broad band electromagnetic holographic imaging
A method of imaging an object, such as a diseased human heart or bone, in a nontransparent medium, such as the human body, involves placing an array of transmitters and receivers in operational...
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6204672 |
System for producing paper product including a compact high-resolution under wire water weight sensor array
A measurement apparatus for sensing three properties of materials including a fixed impedance element coupled in series with the sensor array between an input signal and a reference potential (e.g....
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6147497 |
Using electrical impedance tomography to map subsurface hydraulic conductivity
The use of Electrical Impedance Tomography (EIT) to map subsurface hydraulic conductivity. EIT can be used to map hydraulic conductivity in the subsurface where measurements of both amplitude and...
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6134952 |
Dissolved solid analyzer
On-line measurements of an amount of dissolved solids in a liquid sample are determined by using both conductivity and UV measurements. More particularly, an amount of dissolved solids in a pulp...
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6132593 |
Method and apparatus for measuring localized corrosion and other heterogeneous electrochemical processes
An electrochemical method for measuring localized corrosion and other heterogeneous electrochemical processes is described. A multi-sensor electrode namely the wire beam electrode, integrated by...
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6107811 |
Coupon monitor for cathodic protection system
An automated coupon monitor for detecting the electrical parameters associated with a pipe, a coupon and a reference electrode utilized with a cathodic protection system. A voltage detector circuit...
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6087837 |
Compact high resolution under wire water weight sensor array
A measurement apparatus for sensing three properties of materials including a fixed impedance element coupled in series with the sensor array between an input signal and a reference potential (e.g....
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6058934 |
Planar hematocrit sensor incorporating a seven-electrode conductivity measurement cell
A conductivity sensor for measuring hematocrit and a sensor housing for a blood analysis instrument using the conductivity sensor are described. The conductivity sensor includes a seven-electrode...
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6054038 |
Portable, hand-held, in-situ electrochemical sensor for evaluating corrosion and adhesion on coated or uncoated metal structures
A hand-held and flexible corrosion sensor is described that uses electrochemical impedance spectroscopy (EIS, also known as AC impedance) to detect coating degradation and corrosion of coated and...
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6018985 |
Method and apparatus for measuring unattached radon progeny
A method and apparatus for measuring the concentration of unattached Radon progeny in air is described. The method consists of measuring the conductivity of the air or alternatively the...
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6005399 |
Solder paste and residue measurement system
This invention relates to an on-line statistical process control device for solder paste and residues. The invention consists of electronics hardwa software, and probing systems. The electrical...
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