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6160403 |
Evaluation methods and instrumentation with steel probes used for cathodic protection of underground pipelines
A method and a device to assess the adequacy of a cathodically protected underground pipeline with consideration of AC corrosion. A steel probe and a CSE are installed near the pipeline at a depth....
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6154033 |
Method and apparatus for analyzing nickel-cadmium batteries
A system and method for comprehensive analysis of a multi-cell battery, such as of the nickel-cadmium type, on an individual cell level basis and overall battery basis. For an unsealed battery,...
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6150812 |
Detection of electromagnetic fields as a determinant of an event
Method and apparatus for detecting or analyzing chemical reactions, such as an enzyme reaction, and other events in which electron translation is accompanied by photon emission utilizing a...
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6091246 |
Battery remaining capacity measuring apparatus
Each voltage sensor is provided one to one for a plurality of batteries, for detecting a terminal voltage of each battery. A current sensor detects a current flowing from the plurality of batteries...
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6086724 |
Method for forming particulate reaction and measuring method thereof
Particulates are trapped by laser beam and brought into contact with electrodes to electrochemically and spectroscopically measure the reaction process thereof. Precise measurement of the process...
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6075369 |
Defibrillator system condition indicator with an electrode interface
A defibrillator and electrode system that gives the user a visible and/or audible indication of the condition of the electrodes and other parts of the defibrillator system prior to deployment of...
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6049657 |
Marine pipeline heated with alternating current
A marine pipeline comprising (a) pipe, (b) a coating that electrically insulates the pipe from sea water, and (c) an alternating current heating circuit comprising the pipe in series with ambient...
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5999107 |
Remote cathodic protection monitoring system
A cathodic protection monitoring system for buried metal objects comprising a transponder hard-wire connected to a sacrificial anode and a reference electrode, each of the transponder, the...
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5980708 |
High sensitivity multiple waveform voltammetric instrument
A high sensitivity multiple waveform voltammetric method and instrument are provided for use in electrochemical and other applications. The method consists of applying one or several variable...
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5970428 |
Ground loop detector circuit and method
A ground loop detector circuit and method for an instrument that is used with either a pH sensor or a conductivity sensor. In the instrument used with a pH sensor, an AC diagnostic signal is...
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5936382 |
Battery electrolyte level monitor
An electrolyte level monitor used in combination with a battery having multiple cells. The monitor includes a circuit having an indicator which operates when the electrolyte level is at or above...
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5933010 |
Device to detect charging condition of a storage battery
This relates to a device consisting of a first plurality of light sources that light only when the voltage of a storage battery in a storage battery-generator system is below a predetermined...
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5909114 |
Coulometric analysis method and a device therefor
The present invention provides a rapid coulometric analysis for the quantitative determination of a sample substance with high reproducibility without any application of voltage etc. from the...
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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...
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5830596 |
Method for producing battery tester label and resulting label and battery assembly
A method for producing a battery tester label is disclosed. The method includes forming an inserted tester device and a base layer, which are combined together to form the battery tester label. The...
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5814982 |
Coupon test station for monitoring the effectiveness of cathodic protection
A test station for measuring the effectiveness of cathodic protection including a cylindrical plastic reference tube extending downwardly through the soil to near the protected structure, such as a...
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5747983 |
Apparatus and method for measuring potentials through pavements for buried pipeline cathodic protection systems
Fluid transmission pipelines and similar structures which are cathodically protected from electrolytic corrosion and are disposed in urban areas under pavements and other structures which prevent...
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5712559 |
Cathodic protection reference cell and corrosion sensor
A combination and unitary corrosion monitor and reference cell for cathodic protection systems includes an elongated tubular metal element of the same material as the structure to be protected and...
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5519330 |
Method and apparatus for measuring degree of corrosion of metal materials
A corrosion degree measuring method capable of field measurement for intergranular corrosion, particularly the sensitization degree, of the plant's structural materials in a narrow space. The metal...
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5512831 |
Method and apparatus for testing electrochemical energy conversion devices
A system for testing electrochemical energy conversion and storage devices includes means for sensing the current from the storage device and varying the load across the storage device in response...
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5483164 |
Water quality sensor apparatus
Water quality sensor apparatus comprising a substrate on which a plurality of sensors are supported in spaced apart relationship, each sensor being responsive to a different water characteristic...
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5481181 |
Real-time toxic metals monitor device and method
An device for monitoring workplace air comprises a monitor cell comprising a base and a removable assembly. The removable assembly comprises (1) a flat, electrically insulating substrate having a...
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5479085 |
Method and apparatus for measuring residual capacity of an electric-vehicle battery
A method and an apparatus are provided for detecting a current residual capacity of a battery employed in an electric vehicle, such as an electric car. During a charging process, a value of the...
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5469070 |
Circuit for measuring source resistance of a sensor
A method and apparatus are disclosed for measuring a resistance of a sensor. The apparatus injects a first test current into the sensor and then measures a substantially stable first voltage level...
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5469048 |
Cathodic protection measurement apparatus
A cathodic protection measurement apparatus including a coupon made of similar material as a buried metal pipeline to form an artificial holiday, where the coupon is buried near and electrically...
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5404104 |
Device and method for monitoring and locating defects in, and detachment of, the protective covering of underground or immersed metal structures or pipelines
A method for monitoring the state of, and for locating any detachment of, the protective covering of immersed or buried pipelines or other metal structures subjected to cathodic protection with...
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5370776 |
Electrochemical impedance spectroscopy method for evaluating corrosion inhibitor performance
A simple, expedient method for measuring the effectiveness of a corrosion inhibitor provided to a metallic surface by a surface layer, wherein the layer is formed by use of the corrosion inhibitor...
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5350500 |
Electrokinetic potential measurement
The measurement of electrokinetic potential is of importance in paper-making. A measuring cell (12) for a specific potential known as streaming potential of the kind disclosed in EP B1 0 079 726 is...
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5286357 |
Corrosion sensors
A corrosion sensor (1), apparatus for detecting corrosion of a surface incorporating the sensor, a structural assembly (1,21) incorporating the sensor and method for detecting corrosion of a...
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5285162 |
Galvanic current measuring method and apparatus for monitoring build-up of biological deposits on surfaces of dissimilar metal electrodes immersed in water
The build-up of the deposits on surfaces immersed in water in monitored by passing the water through a galvanic cell comprising a pair of dissimilar metal electrodes (5, 6) mounted on opposite...
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5270659 |
Apparatus for measuring deposition speed of electroless plating
An electroless plating deposition speed measuring apparatus is provided with a sensor having an electrode couple whose pair of electrodes are opposed to each other and a sensor drive circuit that...
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5268632 |
Electrode assembly test unit and method
A test unit for a monitoring device includes reference and measuring electrodes coupled to a preamplifier and a temperature compensating resistor for the preamplifier. The test unit has components...
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5239268 |
Concrete sensor for sensing fresh concrete
A sensor for use during the construction of a concrete structure to enable an assessment to be made of whether or not a pour of fresh concrete has settled uniformly throughout the placement area....
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5218303 |
Broad span dynamic precious metal assay method by driving electrical pulses through an electrolyte wet junction
A dynamic precious metal assay which includes the steps of introducing a controlled amount of liquid electrolyte onto a sample of precious metal alloys, placing an inert electrode in contact with...
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5216370 |
Method and system for measuring the polarized potential of a cathodically protected structures substantially IR drop free
A cathodic protection monitoring system which provides IR drop free cathodic protection potential measurements which are indicative of the effectiveness of the cathodic protection system. The...
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5202637 |
Fault detection in electrochemical gas sensing equipment
A circuit is described which tests whether an amperometric electrochemical gas sensor monitoring the concentration of toxic gases in an atmosphere is working properly. The sensor has a sensing...
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5191292 |
Method of making a sensor cable
A sensor cable for detecting the presence of electrically conductive liquids, e.g. water. The cable has decreased sensitivity to contamination and condensation than conventional cables which are...
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5180968 |
Method and apparatus for compensation of double layer charging current in electrochemical cells
A method and apparatus for compensating for charging current at a working electrode of an electrochemical cell. And a method for measuring faradaic current at the working electrode. Includes...
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5144247 |
Method and apparatus for reducing IR error in cathodic protection measurements
An apparatus for measuring cathodic protection voltage levels on a concealed conductive structure, includes a probe having a standard half cell reference electrode, a working electrode and an...
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5134359 |
Apparatus for measuring electrolytes including optical measurements
Apparatus for measuring electrolyte concentrations in fluid samples. The apparatus includes an ion selective electrode capable of generating a voltage differential having a magnitude related to the...
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5059908 |
Amperimetric measurement with cell electrode deplating
In an amperimetric measurement apparatus comprising an amperimetric cell having a pair of electrodes arranged for contact with a solution, a potential difference is established between the...
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5001417 |
Apparatus for measuring electrolytes utilizing optical signals related to the concentration of the electrolytes
Apparatus for measuring electrolyute concentrations in fluid samples. The apparatus includes an ion selective electrode having a plurality of ion selective detection sites. Each site has an...
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4975647 |
Controlling machine operation with respect to consumable accessory units
Apparatus for controlling the use of consumable accessory units with machines where a memory device associated with each accessory unit holds information concerning the accessory unit, and...
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4956610 |
Current density measurement system by self-sustaining magnetic oscillation
A system for measuring parameters in an environment having a metallic body positioned in an electrolytic medium includes a current density sensing device positioned adjacent the metallic body in a...
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4940944 |
Cathodic protection analyzer in which the fundamental and odd harmonics of a power line frequency are removed
An instrument for measuring cathodic protection voltage levels receives a signal representative of an externally applied, full-wave rectified power line frequency cathodic protection potential,...
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4911914 |
Method for producing an exhaust gas sensor
A method of producing an exhaust gas sensor incorporating BaSnO 3 . Stannate ion and barium ion are reacted in a strong alkali to precipitate water-containing crystals of BaSnO 3 such as BaSnO 3...
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4881037 |
Apparatus and method for measuring the interfacial impedance in an electrochemical cell
Apparatus for measuring the interfacial impedance in an electrochemical cell having a pair of electrodes in contact with an electrolyte medium that includes circuitry for measuring the interaction...
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4868508 |
Trouble detecting circuit for resistive sensor type indicator
In a resistive-sensor type indicator having a resistive sensor whose resistance changes according to a quantity to be measured and an indicator for indicating a sensor output voltage developed...
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4853618 |
Particle counter with variable sized aperture
In a particle counter of the Coulter Counter type the orifice size can be varied by the insertion of an insert into the orifice. This enables particles of a wide ranged of sizes to be effectively...
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4826091 |
Apparatus and method for winding a wire around a structure
Apparatus and methods for winding a wire around a periphery of a structure. The wire is connected to the structure and then pulled around that structure in a manner that produces a high tension in...
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