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)
12/1980
12/02/1980US4236307 Method of making a nitrogen dioxide sensing element
12/02/1980CA1090884A1 Electronic moisture meter
12/02/1980CA1090718A1 Device for braking a vehicle wheel
11/1980
11/27/1980WO1980002600A1 A device for detecting and measuring small capacitance variations
11/27/1980WO1980002594A1 Method and apparatus for detecting discontinuities in a material
11/26/1980EP0019604A1 Method and apparatus for detecting discontinuities in materials
11/26/1980EP0019527A1 Alarm triggering device associated with a conduit in which circulates a fluid carrying solid particles with it
11/26/1980EP0019154A1 Method and circuit for continuous measurement of moisture
11/26/1980EP0019135A2 Measuring probe for use in measuring the temperature or mass of a flowing medium and process for its manufacture
11/26/1980EP0019091A1 Method and apparatus for pipe inspection
11/26/1980EP0019001A1 Electrophoretically concentrating apparatus
11/25/1980US4236138 Gas component detector
11/25/1980US4236121 Oscillators including charge-flow transistor logic elements
11/25/1980US4236109 Dielectric monitored composite assembly
11/25/1980US4235690 Trace gas sensor
11/25/1980US4235689 Apparatus for detecting traces of a gas
11/25/1980US4235688 Cathodic protection system to prevent corrosion
11/25/1980US4235687 Measuring cell for micro-assays, comprising membrane electrodes
11/25/1980US4235096 Gas detection apparatus
11/25/1980US4235020 Inspection system for heat exchanger tubes
11/25/1980CA1090421A1 Oxygen partial pressure measuring device suitably adapted for internal combustion engine exhaust gases
11/18/1980US4234877 Ion type smoke sensor
11/18/1980US4234848 Test head for inductive surface testing having plural resonant coils held in conductive holder
11/18/1980US4234844 Electromagnetic noncontacting measuring apparatus
11/18/1980US4234554 Stable crystalline lithium nitride and process for its preparation
11/18/1980US4234542 Thin coat temperature compensated resistance oxide gas sensor
11/18/1980US4234404 Horizontal electrophoresis or isoelectric focusing apparatus
11/18/1980US4234400 Vertical wicks
11/18/1980US4234071 Device for checking metal pieces, particularly coins
11/18/1980CA1089931A1 Means for measuring the water content of a gas
11/18/1980CA1089670A1 Method and apparatus for determining combustion mixture air/fuel ratio
11/18/1980CA1089640A1 Cobalt-magnesium monoxide alloy ceramic partial pressure of oxygen sensor
11/12/1980EP0018871A1 Device for measuring the carbon monoxide content of exhaust gases, process for its manufacture and control system comprising such a device
11/12/1980EP0018826A1 Apparatus for inspecting a heat exchanger tube
11/12/1980EP0018419A1 Milk inspection apparatus
11/12/1980EP0018375A1 Apparatus and process for continuous flow isoelectric focusing.
11/12/1980EP0018358A1 Method for the determination of enzymes by diffusion in a porous matrix or by electrophoresis
11/12/1980EP0018357A1 Method for the determination of biological substances by diffusion in a porous matrix or by electrophoresis
11/11/1980US4233625 Television monitoring system for automatically aligning semiconductor devices during manufacture
11/11/1980US4233562 Apparatus and method for monitoring web conductivity
11/11/1980US4233257 Method of making a liquid junction for a reference electrode
11/11/1980US4233144 Electrode for voltammetric immunoassay
11/11/1980US4233143 Measured value receiver for the polarographic measurement of gases in liquids
11/11/1980US4233142 Determining oxygen in gases, catalytically active mixed metal oxide layer
11/11/1980US4233136 Plastic tube, plastic membrane, plasticizer, ion exchange material
11/11/1980US4233033 Method and apparatus for measuring the O2 content of a gas
11/11/1980US4233031 Electrochemical testing system and method
11/11/1980US4233029 Controlled fluid flow
11/04/1980US4232326 Chemically sensitive field effect transistor having electrode connections
11/04/1980US4231733 Combined O2 /combustibles solid electrolyte gas monitoring device
11/04/1980US4231249 Apparatus and methods for monitoring concentrations of toxic substances in a work environment
10/1980
10/29/1980EP0018246A1 Igniter arrangement for omnidirectionally exploding antivehicle mines
10/29/1980EP0018221A1 Method of and apparatus for measuring the amount of combustibles present in a gas
10/29/1980EP0018113A1 Device and method for detecting and measuring a gaseous anhydride
10/29/1980EP0018002A1 Process for the determination of proteases and antiproteases
10/29/1980EP0017731A1 A potentiostat for use with electrochemical cells
10/29/1980EP0017729A2 Oxygen sensor
10/29/1980EP0017682A2 Method and system for geophysical induction surveying
10/28/1980US4230988 Resistance neutralizing system for electrochemical devices
10/28/1980US4230987 Digital eddy current apparatus for generating metallurgical signatures and monitoring metallurgical contents of an electrically conductive material
10/28/1980US4230983 Seed viability analyzer
10/28/1980US4230930 Laser welding method for electrical wire connection to a terminal pin of an exhaust gas sensor
10/28/1980US4230685 Method of magnetic separation of cells and the like, and microspheres for use therein
10/28/1980US4230555 Oxygen gas analyzer using a solid electrolyte
10/28/1980US4230554 Apparatus for measuring ions in solution
10/28/1980US4230537 Detect dissolved gases, diffusion
10/28/1980US4230392 Electrical socket connector
10/28/1980US4229967 Method and means for testing the flammability of combustible materials
10/28/1980CA1088627A1 Oxygen sensor for industrial air/fuel control and method of making same
10/28/1980CA1088626A1 Resistance-type ceramic sensor element and sensor for combustion gas sensing device
10/21/1980US4229645 Detector and recorder of holes and disruptions in plastic material sheets and webs
10/21/1980US4229275 Solid electrolyte oxygen sensor and method of making same
10/21/1980US4229264 Method for measuring the relative etching or stripping rate of a solution
10/21/1980US4228814 Cleaning apparatus for test electrodes
10/21/1980US4228675 Exhaust gas sensor electrical circuit improvement
10/21/1980CA1088216A1 Ion-controlled diode
10/21/1980CA1088158A1 Retractable moisture probe
10/21/1980CA1088157A2 Microbial detection and enumeration apparatus
10/21/1980CA1088025A1 Thermal convection counter streaming sedimentation and forced convection galvanization method and apparatus for controlling the sex of mammalian offspring
10/21/1980CA1087870A1 Moisture measuring apparatus
10/16/1980WO1980002200A1 Method and apparatus for measuring electrostatic charge density
10/16/1980WO1980002199A1 Improvements relating to moisture meters of a type especially suitable for estimating the moisture content of organic materials
10/15/1980EP0017502A1 Oxygen sensor element
10/15/1980EP0017375A1 Exhaust gas sensor having porous metal-impregnated ceramic element
10/15/1980EP0017370A1 Coin testing apparatus
10/15/1980EP0017359A1 Ceramic type sensor device
10/15/1980EP0017236A1 Voltammetric cell and process for manufacturing an appropriate measuring electrode
10/15/1980EP0017221A1 Process and device for the temporal and spatial coordination of the proceeding of a field desorption ionisation
10/15/1980EP0017054A2 Apparatus for measuring the resistivity of mixed materials
10/14/1980US4228400 Conductometric gas analysis cell
10/14/1980US4228393 Moisture meter
10/14/1980US4228128 Exhaust gas sensor having porous, metal-impregnated ceramic element
10/14/1980US4227988 Potentiostat for use with electrochemical cells
10/14/1980US4227984 Potentiostated, three-electrode, solid polymer electrolyte (SPE) gas sensor having highly invariant background current characteristics with temperature during zero-air operation
10/14/1980US4227974 Electrochemical cell having a polarographic device with ion selective electrode as working electrode and method of use
10/14/1980US4227973 Automatic analysis of alkali metals halides etc. by means of the use of ion-selective electrodes
10/14/1980US4227414 Liquid testing kit
10/14/1980US4227411 Relative humidity measurement
10/14/1980US4227398 Piezoelectric gum measurement device
10/14/1980CA1087761A1 Asymmetric cylinder electron capture detector
1 ... 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 ... 1099