| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 05/27/1981 | EP0029023A1 A device for detecting and measuring small capacitance variations |
| 05/26/1981 | US4270084 Apparatus and method for determining electrical conductivity of water vapor |
| 05/26/1981 | US4269195 Apparatus for measuring a pulmonary function |
| 05/12/1981 | US4267515 Distortion factor meter circuit |
| 05/12/1981 | US4267506 Collinear four-point probe head and mount for resistivity measurements |
| 05/12/1981 | US4267503 Method and instrument for testing the operating characteristics of a capacitor |
| 05/05/1981 | US4266195 Water detector |
| 05/05/1981 | US4266188 Method and apparatus for measuring a component in a flow stream |
| 05/05/1981 | US4266187 Method and apparatus for measuring effectiveness of a corrosion inhibitor |
| 05/05/1981 | US4266185 Probes and apparatus for and methods of measuring crack depths |
| 04/28/1981 | US4264860 Resistor measuring apparatus |
| 04/28/1981 | US4264859 Method and apparatus for measurement of attenuation and distortion by a test object |
| 04/28/1981 | US4263920 Method of and device for determining internal body structure |
| 04/22/1981 | EP0027151A2 Circuit arrangement for a device for measuring the conductance of human organisms |
| 04/21/1981 | US4263653 Digital RF wattmeter |
| 04/21/1981 | US4263549 Apparatus for determining differential mode and common mode noise |
| 04/21/1981 | CA1099782A1 Ground fault protective apparatus of field windings |
| 04/15/1981 | EP0026796A1 Device for measuring the vegetative reactivity situation of the human organism |
| 04/14/1981 | US4262253 Constant alternating current conductivity detector for a chromatograph |
| 04/14/1981 | US4262246 Standing wave ratio detecting apparatus |
| 04/14/1981 | CA1099340A1 Capacitance measuring device |
| 03/31/1981 | US4259633 Method and apparatus for measuring the moisture content of wood |
| 03/31/1981 | US4259632 Continuous action capacitive moisture measuring apparatus |
| 03/31/1981 | US4259631 Method and arrangement for measuring the attenuation-versus-frequency characteristics of two-ports |
| 03/31/1981 | US4258736 Electrostatic monitoring system |
| 03/24/1981 | US4258315 Inductance meter |
| 03/17/1981 | US4257123 Device for monitoring the performance of a transmitter |
| 03/17/1981 | US4257001 Resonant circuit sensor of multiple properties of objects |
| 03/11/1981 | EP0025029A1 Capacitive measuring bridge arrangement |
| 03/11/1981 | EP0024556A1 Monitoring arrangement for the insulating resistance of a series voltage circuit of an airfield's lighting system |
| 03/05/1981 | WO1981000620A1 Capacities measuring transducer |
| 02/24/1981 | US4253056 Ground fault detector for DC power supply |
| 02/17/1981 | US4251767 Dual channel capacitance measurement device |
| 02/17/1981 | CA1095988A1 Calibrating and measuring circuit for a capacitive probe-type instrument |
| 02/11/1981 | EP0023732A1 Capacitive gauge |
| 02/10/1981 | US4250452 Pressure sensitive transducer circuits |
| 02/03/1981 | US4249258 Self-calibrating voltage standing-wave ratio meter system |
| 02/03/1981 | US4249127 Standing wave ratio measuring system |
| 01/27/1981 | US4247815 Method and apparatus for physiologic facsimile imaging of biologic targets based on complex permittivity measurements using remote microwave interrogation |
| 01/27/1981 | US4247814 Mat testing apparatus |
| 01/20/1981 | US4246538 Method of investigating the electrical resistivity of the ground and apparatus for use in the method |
| 01/20/1981 | US4246534 Calibration method for lumped capacitance measurement of complex permittivity at HF, VHF and UHF frequencies |
| 01/20/1981 | US4245643 Method and apparatus for measuring the ohmic contact resistance of an electrode attached to body tissue |
| 01/20/1981 | US4245506 Porous membrane humidity sensor |
| 01/13/1981 | US4245320 Method and device for measuring the slope of the envelope delay characteristic of a transmission channel and their application to an automatic equalizer selection technique |
| 01/07/1981 | EP0021394A1 Interelectrode impedance measuring apparatus for electrocardiography |
| 01/06/1981 | US4243933 Capacitance measurement apparatus |
| 12/30/1980 | US4242631 Front-end circuit apparatus for impedance measurements and the like |
| 12/16/1980 | CA1091802A1 System for aligning whip antenna matching base units |
| 12/09/1980 | US4238726 Method of measuring low impedance for obtaining unknown capacitance and/or resistance |
| 12/09/1980 | CA1091327A1 Apparatus for detecting wet and icy surface conditions |
| 12/02/1980 | US4237415 Method and apparatus for measuring conductivity in electrical feedthrough |
| 11/27/1980 | WO1980002600A1 A device for detecting and measuring small capacitance variations |
| 11/26/1980 | EP0019154A1 Method and circuit for continuous measurement of moisture |
| 11/25/1980 | US4236109 Dielectric monitored composite assembly |
| 11/18/1980 | US4234844 Electromagnetic noncontacting measuring apparatus |
| 11/11/1980 | US4233559 Quickly performed measuring method for ascertaining the concentration of the polar components in a material otherwise mainly non-polar |
| 10/29/1980 | EP0017676A1 Method for determining a virtual longitudinal reactance in an electric net |
| 10/21/1980 | CA1088216A1 Ion-controlled diode |
| 10/21/1980 | CA1087870A1 Moisture measuring apparatus |
| 10/14/1980 | US4228399 Offshore pipeline electrical survey method and apparatus |
| 10/14/1980 | US4228398 Method of testing distance relays |
| 10/14/1980 | US4228394 Digital ohmmeter with electrical continuity tester |
| 10/14/1980 | US4228393 Moisture meter |
| 10/14/1980 | US4228392 Second order correction in linearized proximity probe |
| 10/07/1980 | US4227151 Measurement and monitoring of the electrical conductivity of liquor samples |
| 10/01/1980 | EP0015920A1 Method and system for detection of microwave reflective matter. |
| 09/23/1980 | US4224565 Moisture level determination in sealed packages |
| 09/17/1980 | EP0015864A1 Circuit for the determination of the reactance of a power transmission line in the case of a short circuit |
| 09/17/1980 | EP0015253A1 A transducer for sensing a variable parameter and for converting a so-obtained analog signal to a digital signal. |
| 09/09/1980 | CA1085460A1 Automatic measurement of impedance |
| 09/02/1980 | US4220951 Method and system for protecting barge |
| 09/02/1980 | US4220921 Conductivity probe for viscous liquids |
| 09/02/1980 | US4220920 Electrodeless conductivity measuring system |
| 09/02/1980 | US4220915 Resistivity measurement system |
| 09/02/1980 | US4220914 AM-PM Conversion for measuring delay distortion |
| 08/26/1980 | US4219807 Sensor system for an impressed cathodic protection circuit |
| 08/26/1980 | US4219776 Method and apparatus for measuring in situ density and fabric of soils |
| 08/26/1980 | US4219770 Insertion loss and phase shift measurement system and method |
| 08/26/1980 | US4219740 Proximity sensing system and inductance measuring technique |
| 08/19/1980 | US4218650 Apparatus for measuring semiconductor device resistance |
| 08/19/1980 | US4218649 High voltage leakage and breakdown test circuit |
| 08/12/1980 | US4217544 Method and apparatus for improved temperature compensation in a corrosion measurement system |
| 08/12/1980 | US4217543 Digital conductance meter |
| 08/12/1980 | US4217542 Self inverting gauging system |
| 08/05/1980 | US4216425 Apparatus and method for detecting a substance in a fluid medium |
| 08/05/1980 | US4216424 Method and apparatus for testing electrolytic capacitors |
| 07/22/1980 | US4214311 Method and apparatus for measuring insulation resistance |
| 07/22/1980 | US4214203 Location and effect of adsorbed chemicals on the dielectric substructure of membranes by ultra low frequency spectrometry |
| 07/22/1980 | CA1082310A1 Vapor liquid fraction determination |
| 07/22/1980 | CA1082309A1 Haylage/silage moisture tester |
| 07/15/1980 | US4213085 Phase inversion test device |
| 07/09/1980 | EP0013224A1 Method and apparatus for measuring the resistivity of fluids in a borehole |
| 07/08/1980 | EP0015920A4 Method and system for detection of microwave reflective matter. |
| 06/24/1980 | US4209741 Apparatus for the continuous monitoring of ground bed resistance |
| 06/24/1980 | US4209740 Detector for locating the interfacial boundary level between two liquids |
| 06/24/1980 | US4208909 Admittance sensing probe having multiple sensing elements |
| 06/17/1980 | US4208624 Method and apparatus for investigating dielectric semiconductor materials |
| 06/17/1980 | CA1079807A1 Resistance measuring circuit |
| 06/10/1980 | US4206648 Impedance measuring circuit |