Patents
Sitemap › G01 - Measuring; Testing › G01N - Investigating or analysing materials by determining their chemical or physical properties › G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
Patents for G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (109,839)
11/1989
11/15/1989EP0236440B1 Ion-sensitive electrochemical sensor and method of determining ion concentrations
11/15/1989CN2047787U Ammonia sensor
11/15/1989CN1037214A Wavelength dispersion electrophoresis apparatus
11/14/1989US4881109 Sensor using a field effect transistor and method of fabricating the same
11/14/1989US4881031 Eddy current method and apparatus for determining structural defects in a metal object without removing surface films or coatings
11/14/1989US4881030 Method and apparatus for measuring and precisely locating internal tensile stresses in hardened regions of components by measuring coercive field strength and barkhausen noise amplitude
11/14/1989US4881025 Frequency dependent identification of materials
11/14/1989US4880519 Gas sensor element
11/14/1989US4880120 Flushing volatile contaminants by gas injection; reuse
11/09/1989DE3913763A1 Mass spectrometer
11/09/1989DE3913596A1 Oxygen-ion-conducting solid electrolyte and process for the preparation thereof
11/09/1989DE3820899C1 Method and apparatus for the continuous measurement and adjustment of the NH3 leakage in the waste stream from waste gas denitrogenation by means of ammonia
11/09/1989DE3814634A1 Device for measuring the pH value in the meat of slaughtered animals
11/09/1989DE3813150A1 Mit kohlenstoff-fasern verstaerktes formstueck With carbon-fiber-reinforced push fitting
11/08/1989EP0341169A2 Method for the electrochemical identification of Al alloys
11/08/1989EP0340675A2 Time-resolved fluorimetric detection of lanthanide labeled nucleotides
11/08/1989EP0340654A2 Potentiometric sensor for determining oxygen activity at low temperatures
11/08/1989EP0340653A2 Kit for electrophoresis gel medium
11/08/1989EP0340509A2 Method and apparatus for the determination of component parts in a mixture
11/08/1989CN2047377U Cell type gas corrosive probe
11/07/1989US4879517 Temperature compensation for potentiometrically operated ISFETS
11/07/1989US4879472 Multiplexed electronically programmable multimode ionization detector for chromatography
11/07/1989US4879012 Photo-dissociation of fluorophor
11/07/1989US4879005 Redox mixtures
11/07/1989US4878381 Evaluation device for measuring signals of a lambda probe
11/07/1989US4878380 Internal combustion engine
11/07/1989EP0263875A4 Multiple control standard for blood analysis.
11/02/1989WO1989010558A1 Method for determining biaxial stresses in ferromagnetic materials
11/02/1989WO1989010557A1 Process and apparatus for disturbance-free measurement of the magnetic properties a test object
11/02/1989WO1989010556A1 Detection method
11/02/1989WO1989010555A1 Lithium ion-selective compositions, electrodes and a method of use
11/02/1989WO1989010554A1 Ion-sensitive film, a process for producing the same, and ion sensor
11/02/1989WO1989010552A1 Apparatus for conducting a plurality of simultaneous measurements of electrochemiluminescent phenomena
11/02/1989WO1989010551A1 Method and apparatus for conducting electrochemiluminescence measurements
11/02/1989WO1989010550A1 A detector for fluorescence and absorption spectroscopy
11/02/1989WO1989010395A1 Enzymatic electrode and its preparation method
11/02/1989EP0340034A2 Random-filament, multi-directionally responsive marker for use in electronic article surveillance systems
11/02/1989EP0339975A2 Improved electrophoresis device with near-vertical gel plates
11/02/1989EP0339974A2 Improved gel plate assembly for electrophoresis
11/02/1989EP0339972A2 Electrophoresis device with removable buffer tank
11/02/1989EP0339971A2 Electrophoresis device
11/02/1989EP0339821A1 Bonding to metal surfaces
11/02/1989EP0339781A2 Automated capillary injector
11/02/1989EP0339780A2 Capillary detector cartridge for electrophoresis
11/02/1989EP0339779A2 Automated capillary electrophoresis apparatus
11/02/1989EP0339775A2 Vial holder
11/02/1989EP0339678A2 Electrophoretic media
11/02/1989EP0339613A2 Ion selective electrode
11/02/1989EP0339062A1 Textile of polyester for manufacturing electrophoresis gels and electrophoresis gel
11/02/1989EP0143825B1 Method and apparatus for testing using a plurality of frequencies
11/02/1989DE3813680A1 Device for the application of a flexible container on a metallic workpiece to be tested
11/01/1989CN2047019U Solution concentration monitor
11/01/1989CN1036835A Thermomagnetic characteristics tester for rare-earth permanent magnet
11/01/1989CN1036834A Dry ion-selective electrodes for determination of ionic species in aqueous media
11/01/1989CN1036833A Sampler of constan-velocity cappillary electrophoresis apparatus
10/1989
10/31/1989US4878180 Method of evaluating the condition of tubular goods
10/31/1989US4878043 Device for indicating hydroculture-related values
10/31/1989US4878019 Electrical sensing system for measuring ferrous particles within a fluid with temperature compensation circuit
10/31/1989US4878017 High speed D.C. non-contacting electrostatic voltage follower
10/31/1989US4878015 Sensors for selectively determining liquid-phase or gas-phase components using a heteropolysiloxane sensitive layer
10/31/1989US4878008 Contour-clamped homogeneous electric field generator
10/31/1989US4877923 Sensors for detecting and locating liquid leaks
10/31/1989US4877582 Chemical sensor device with field effect transistor
10/31/1989US4877511 Oxygen concentration-sensing device
10/31/1989US4877510 Apparatus for preparative gel electrophoresis
10/31/1989US4877506 Monolithic solid electrolyte oxygen pump
10/31/1989US4877492 Method of measuring electrolyte in blood and urine by electrode method
10/31/1989US4877332 Transducer for determining contaminations in fabrics
10/31/1989US4876890 Electrical article containing crystalline zeolite molecular sieves; hydrometers; environmental/process control/
10/31/1989CA1262512A1 Device for measuring the water content of ink samples
10/26/1989DE3812899A1 Electronic camera for the documentation of fluorescence patterns on electrophoretic gels
10/25/1989EP0338572A1 Liquid chromatograph-direct coupled mass spectrometer
10/25/1989EP0338400A2 Capacitive sensor for determining the liquid level in a container
10/25/1989EP0338368A1 Thin film photoluminescent articles and method of making the same
10/25/1989EP0338356A1 Time-current and time-potential measurements for controlling and regulating galvanic copper deposition
10/25/1989CN1036639A Fluorescent monitoring electrophoresis apparatus
10/25/1989CN1036638A New style chemical oxygen consumption measuring instrument
10/24/1989US4876512 Method for rapidly determining the swelling-clay content in shales and shaly sandstone formations by high-frequency dielectric constant measurements
10/24/1989US4876504 Apparatus for investigating the condition of a bacteria containing suspension through frequency profile of electrical admittance
10/24/1989US4876205 Electrochemical assay for haemoglobin
10/24/1989US4875990 Oxygen concentration measuring device
10/24/1989US4875981 Oxygen analyzing method and device
10/24/1989US4875940 Massecuite supersaturation monitor
10/24/1989US4875406 Device for detecting different pollutants in gas streams
10/24/1989US4875357 Optical paramagnetic/diamagnetic gas sensor
10/24/1989CA1262475A1 Electrode with sealing assembly and fill hole cover
10/19/1989WO1989009938A1 Piezoelectric specific binding assay with mass amplified reagents
10/19/1989WO1989009937A1 Enzymatically amplified piezoelectric specific binding assay
10/19/1989WO1989009934A1 Ion mobility detector
10/19/1989WO1989009933A1 PLANAR POLAROGRAPHIC PROBE FOR DETERMINING THE lambda VALUE OF GASEOUS MIXTURES
10/19/1989WO1989009932A1 Ion sensor
10/19/1989WO1989009846A1 Electrochemically controlled superconductivity
10/19/1989DE3910272A1 Oxygen sensor having enhanced stability to repetitive thermal shocks and having a shorter warm-up time
10/19/1989DE3910148A1 Method for testing a porous protective layer of an oxygen sensor
10/19/1989DE3811915A1 Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature
10/19/1989DE3811864A1 Measurement device for measuring the oxygen partial pressure in aggressive liquids at high temperature
10/19/1989DE3811732A1 Circuit arrangement for testing the functioning of the catalytic converter of motor vehicles
10/18/1989EP0337292A2 Intermittent voltage application on an electrode
10/18/1989EP0337253A2 Apparatus and method for characterizing conductivity of materials
10/18/1989EP0337117A2 On-line web internal resistivity measuring apparatus
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