| Patents for G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (109,839) | 
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| 10/02/1990 | US4960708 Pressurized packaged reference liquid for blood gas analysis | 
| 10/02/1990 | US4960497 Apparatus and method for minimizing the effect of an electrolyte's dissolved oxygen content in low range oxygen analyzers | 
| 10/02/1990 | US4960496 Atmospheric HCI monitor | 
| 10/02/1990 | US4959965 System for monitoring a liquid entrained in a fluid | 
| 09/30/1990 | CA2002482A1 Oxygen sensor having a flat plate element and heater | 
| 09/30/1990 | CA2001883A1 Oxygen sensor having a flat plate element and heater | 
| 09/29/1990 | CA2013205A1 Manipulator for crack detector transducers | 
| 09/28/1990 | CA2013144A1 Inductive signal transmission | 
| 09/27/1990 | DE4001406A1 System for determining humidity of flowable bulk material - has two measurement probes arranged at distance from each other, with measuring plates extending in bulk material direction | 
| 09/27/1990 | DE3909729A1 Variable hybridsonde fuer mess- und pruefzwecke und zum abtasten von oberflaechen in der zerstoerungsfreien werkstoffpruefung, auch in starken allgemeinen magnetischen ueberlagerungs/stoerfeldern Variable hybrid probe for measurements or tests and scan from surface until the nondestructive werkstoffpruefung, even in strong magnetic general overlay / interference fields | 
| 09/27/1990 | DE3908393A1 Sensorelement fuer grenzstromsensoren zur bestimmung des (lambda)-wertes von gasgemischen Sensor element for cross-current sensors for determination of (lambda) value of gas mixtures | 
| 09/26/1990 | EP0389320A1 Apparatus for measuring continuously the substance contents of a granular, powdery or viscous product | 
| 09/26/1990 | EP0388990A2 Method and articles employing ion exchange material | 
| 09/26/1990 | EP0388821A2 Method for testing and/or measuring by means of a fluxgenerating sub-device | 
| 09/26/1990 | EP0388640A2 High speed waveform sampling with a tunneling microscope | 
| 09/26/1990 | EP0388446A1 Paste-like preparation for performance testing and/or cleaning of amperometric sensors | 
| 09/26/1990 | CN2062848U High-voltage apparatus for testing glass-lined equipment | 
| 09/26/1990 | CN2062847U Fluorescent magnetic powder defectoscope for axle of railway rolling stock | 
| 09/26/1990 | CN2062846U Sodium ion concentration tester | 
| 09/26/1990 | CN2062845U Carbon black specific resistance tester | 
| 09/26/1990 | CN2062844U High-resolution electronic gold detector | 
| 09/26/1990 | CN1045662A Production process of humidity sensor element formed with the ceramic of compact texture | 
| 09/25/1990 | US4959138 Measuring probe for the potentiometric determination of ion concentrations | 
| 09/25/1990 | US4959134 Dna sequences | 
| 09/25/1990 | US4959133 Field inversion electroblotting & electroelution | 
| 09/25/1990 | US4959130 Ultramicroelectrode, process for making same and its application | 
| 09/25/1990 | US4959010 Automatically regulated combustion process | 
| 09/25/1990 | US4958611 Air-fuel ratio controller of internal combustion engine | 
| 09/25/1990 | US4958514 Gas sensing element | 
| 09/25/1990 | US4958513 Gas detecting device | 
| 09/25/1990 | CA1274585A1 Method and apparatus for measurement of steam quality | 
| 09/25/1990 | CA1274583A1 Sensor arrangements | 
| 09/23/1990 | CA2012773A1 Method and device for testing an object using magnetic flux | 
| 09/22/1990 | CA2000917A1 Modified cermet fuel electrodes for solid oxide electrochemical cells | 
| 09/21/1990 | WO1990011513A1 A conductivity or capacity cell and a method for producing the same and a probe including such a cell and a method for measuring of relative humidity with such a probe | 
| 09/21/1990 | CA2064913A1 Conductivity or capacity cell and a method for producing the same and a probe including such a cell and a method for measuring of relative humidity with such a probe | 
| 09/20/1990 | WO1990010864A1 Hot flaw detector | 
| 09/20/1990 | WO1990010862A1 SENSOR ELEMENT FOR LIMIT CURRENT SENSORS FOR DETERMINING μ-VALUES OF MIXTURES OF GASES | 
| 09/20/1990 | CA2012474A1 Electrochemical biosensor based on immobilized enzymes and redox polymers | 
| 09/19/1990 | EP0388170A2 Capillary transport zone coated with adhesive | 
| 09/19/1990 | EP0388053A2 Speciation of mycobacteria by pulsed-field gel electrophoresis of chromosomal DNA fragments | 
| 09/19/1990 | EP0388017A2 Salt bridge for analytical chemistry system | 
| 09/19/1990 | EP0388016A2 Liquid degassing system | 
| 09/19/1990 | EP0388014A2 Automatic chemistry analyzer | 
| 09/19/1990 | EP0231231B1 Process for detecting toxic matter in air which enters a cabin or similar enclosure where persons are present | 
| 09/19/1990 | CN2062446U 空气离子闪光测试器 Air ions flash tester | 
| 09/19/1990 | CN2062445U 油水界面传感器 Oil-water interface sensor | 
| 09/19/1990 | CN1045456A Device and method for detecting ionic components in solution | 
| 09/18/1990 | US4958281 Signal processing method for determining base sequence of nucleic acid | 
| 09/18/1990 | US4958130 Evaluation method of corrosion of steel material embedded in concrete | 
| 09/18/1990 | US4958128 Method of examining an inside surface-coated metallic pipe and apparatus | 
| 09/18/1990 | US4957705 Oxygen gas concentration-detecting apparatus | 
| 09/18/1990 | US4957615 Polymer membrane which contains porphyrin | 
| 09/18/1990 | US4957614 Electrochemical detection device | 
| 09/18/1990 | US4957613 Adjustable-height vertical gel slab electrophoresis apparatus | 
| 09/18/1990 | US4957593 Conductive filler and modifiers in polymer matrix | 
| 09/18/1990 | US4957582 Controlling flow of biological fluids to prevent plugging, blood analysis | 
| 09/18/1990 | CA1274299A1 Identification system | 
| 09/18/1990 | CA1274277A1 Circumferentially compensating eddy current probe | 
| 09/14/1990 | WO1990010655A1 Surface functionalized and derivatized conducting polymers and methods for producing same | 
| 09/14/1990 | CA2048692A1 Surface functionalized and derivatized conducting polymers and method for producing same | 
| 09/13/1990 | DE3907556A1 Apparatus and method for raising the selectivity of semiconductor sensors by means of controlled heating temperatures | 
| 09/12/1990 | EP0387041A1 Nitrogen specific detector | 
| 09/12/1990 | EP0387026A2 Biosensor device | 
| 09/12/1990 | EP0386925A1 Capillary zone electrophoresis cell system | 
| 09/12/1990 | EP0386764A2 Platinum alloy electrocatalyst | 
| 09/12/1990 | EP0386763A1 Selective permeable membrane, method of producing and electrode using the same | 
| 09/12/1990 | EP0386679A2 Method of analyzing washings for metal and apparatus | 
| 09/12/1990 | EP0386665A2 Method and apparatus for measuring particles in polydispersive systems, and concentration of particles of monodispersive aerosols | 
| 09/12/1990 | EP0386660A1 Transducer for conductimetry | 
| 09/12/1990 | EP0386353A1 Smell sensing element and smell sensing device | 
| 09/12/1990 | EP0386119A1 Microelectrochemical devices and method of detecting | 
| 09/12/1990 | EP0386006A1 Sensor element for limit sensors for determining the lambda value of gaseous mixtures. | 
| 09/12/1990 | EP0191106B1 Humidity sensor | 
| 09/12/1990 | CN2062048U Electrophoresis device of support with electrode | 
| 09/12/1990 | CN1045296A High temperature ultralow oxygen rapid measuring probe for calcium beta " aluminium monoxide | 
| 09/12/1990 | CN1009578B Slag testing device | 
| 09/11/1990 | US4956149 Biosensor device provided with an agitator | 
| 09/11/1990 | US4956074 Coulometric detector, multilayer plastic casings, seals, pumps | 
| 09/11/1990 | US4956073 Method to make microcavities and its application to an electrochemical sensor | 
| 09/11/1990 | US4956072 Oxygen sensor | 
| 09/11/1990 | US4956065 Dielectrophoresis using a combination of electrodes and the use of feedback controlling system | 
| 09/11/1990 | US4956063 Ozone measuring method | 
| 09/11/1990 | US4956062 Method for concentration determination of lithium ions | 
| 09/11/1990 | US4955235 Apparatus and method for providing a combined ultrasonic and eddy current inspection of a metallic body | 
| 09/11/1990 | CA1273998A1 Circumferentially compensating eddy current probe with alternately polarized transmit coils and receiver coils | 
| 09/11/1990 | CA1273822A1 Water content detecting device for diaper | 
| 09/10/1990 | WO1990010861A1 Method and apparatus for determination of a constituent in a fluid sample | 
| 09/10/1990 | CA2028840A1 Method and apparatus for determination of a constituent in a fluid sample | 
| 09/08/1990 | CA2011679A1 Device and method for detecting ionic components in solution | 
| 09/07/1990 | WO1990010871A1 Assay for and treatment of autoimmune diseases | 
| 09/07/1990 | WO1990010235A1 Method of drug detection | 
| 09/07/1990 | WO1990010223A1 Process for detecting faults in containers made of electrically non-conductive material and device for implementing it | 
| 09/07/1990 | WO1990010212A1 Environmental monitoring device and method | 
| 09/07/1990 | WO1990010190A1 Device for determining the parameters of developing surface cracks | 
| 09/07/1990 | WO1990007708A3 Capacitive humidity sensor | 
| 09/07/1990 | WO1990006520A3 Electrographic process for generating an electrical image signal | 
| 09/07/1990 | CA2049007A1 Assay for and treatment of autoimmune diseases | 
| 09/07/1990 | CA2010879A1 Speciation of mycobacteria by pulsed-field gel electrophoresis of chromosomal dna fragments | 
| 09/06/1990 | DE3906599A1 Compensation element for a measuring device for combustible gases |