| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 02/22/1989 | EP0303615A1 Measurement circuit. |
| 02/22/1989 | EP0303595A1 Linear position sensor. |
| 02/22/1989 | CN2033125U Precise direct-current bridge testing device with microcomputer |
| 02/21/1989 | US4806881 Multi-channel modulated numerical frequency synthesizer |
| 02/21/1989 | US4806846 High accuracy direct reading capacitance-to-voltage converter |
| 02/15/1989 | EP0303442A2 Multi-frequency capacitance sensor |
| 02/15/1989 | EP0303356A2 Scanning combination thickness and moisture gauge for moving sheet material |
| 02/15/1989 | EP0303092A2 Method for measuring resistances, particularly the resistances of subscriber's cables of a digital time division communication network |
| 02/15/1989 | CN2032725U Device for measuring land ac apparent conductivity |
| 02/14/1989 | US4805189 Signal processing system |
| 02/14/1989 | US4804906 Method and apparatus for well casing inspection |
| 02/09/1989 | WO1989001167A1 Process for determining the electromagnetic material properties and properties of waveguides and of waveguide transistors |
| 02/08/1989 | EP0302727A2 Monitoring apparatus |
| 02/07/1989 | US4803420 Method of determining the position of the tap on a resistance teletransmitter |
| 02/07/1989 | US4803419 Testing head device for a microwave network analyzer |
| 02/02/1989 | DE3724402A1 Method for testing the interference immunity of electronic apparatuses |
| 01/31/1989 | US4802106 Sweep marker display apparatus for polar coordinate display |
| 01/31/1989 | US4801864 Tester for terminal post resistance for an energy storage element connected in an electrical circuit |
| 01/31/1989 | US4801862 Method for measuring complex dielectric constant or complex magnetic constant of materials in three-dimensional directions |
| 01/25/1989 | EP0300864A2 Apparatus for the detection of integrated-circuit de-passivation |
| 01/25/1989 | EP0300653A2 Loop resistance test apparatus |
| 01/25/1989 | EP0300616A1 Wall thickness measurement apparatus |
| 01/24/1989 | US4800374 Personnel antistatic test device |
| 01/19/1989 | DE3722619A1 Device for measuring the stray parameters of a planar structure in the millimetre wave range |
| 01/18/1989 | EP0299887A1 Test appliance and process for an integrated circuit so as to measure surface layer effects |
| 01/18/1989 | EP0299875A2 Method of measuring resistivity, and apparatus therefor |
| 01/18/1989 | EP0139638B1 Insulation analyzer and method |
| 01/17/1989 | US4799063 Method and apparatus for isolating faults in an antenna system |
| 01/12/1989 | DE3722213A1 Measurement method for determining the concentration of a medium |
| 01/11/1989 | EP0298865A1 Automatic system for the endurance-testing of a plurality of electrical conducting elements |
| 01/10/1989 | US4797664 Environmental abnormality detection apparatus |
| 01/10/1989 | US4797642 Zero-setback sliding load for network analyzer calibration |
| 01/10/1989 | US4797627 Programmatically generated in-circuit test for general purpose operational amplifiers |
| 01/10/1989 | US4797622 Technique for determining the values of circuit elements in a three terminal equivalent circuit |
| 01/10/1989 | US4797614 Apparatus and method for measuring conductance including a temperature controlled resonant tank circuit with shielding |
| 01/10/1989 | US4797604 Wire length meter suppling current to a wire from which a signal representative of length is derived |
| 01/10/1989 | US4797603 Device for measuring the ratio of two low value capacities |
| 01/10/1989 | CA1248587A1 Charge balancing detection circuit |
| 01/05/1989 | DE3821535A1 Method for the detection of the surface layer condition of bodies |
| 01/04/1989 | EP0297933A1 Apparatus to check and to measure the insulation of an electric network |
| 01/03/1989 | US4795983 Method and apparatus for identifying a faulted phase |
| 01/03/1989 | US4795966 Method and apparatus for measuring the equivalent series resistances of a capacitor |
| 01/03/1989 | US4795965 Capacitance to voltage conversion circuit including a capacitive bridge and a capacitive offset |
| 01/03/1989 | US4795964 Method and apparatus for measuring the capacitance of complementary field-effect transistor devices |
| 01/03/1989 | US4795962 Floating driver circuit and a device for measuring impedances of electrical components |
| 01/03/1989 | CA1248181A1 Electric device or circuit testing method and apparatus |
| 12/29/1988 | WO1988010432A1 Method for removing cable generated phase errors from network analyzer measurement |
| 12/28/1988 | CN88104618A Unbalanced complete cut-off network |
| 12/27/1988 | US4794350 Circuit arrangement for converting a resistance variation into a frequency variation |
| 12/27/1988 | US4794322 Method, system, and tool for investigating borehole casings |
| 12/27/1988 | US4794321 Variable capacity proximity sensor |
| 12/27/1988 | US4794320 Multi-frequency capacitance sensor |
| 12/20/1988 | US4792751 Apparatus for field testing the performance of a feedforward amplifier |
| 12/19/1988 | EP0303615A4 Measurement circuit. |
| 12/13/1988 | US4791375 Apparatus for detecting degradation of an arrester |
| 12/13/1988 | US4791354 Method for measuring the AC electrical conductance of a polymeric composite to determine homogeneity of dispersion of a filler |
| 12/13/1988 | US4791353 Scanning combination thickness and moisture gauge for moving sheet material |
| 12/13/1988 | US4791352 Transmitter with vernier measurement |
| 12/13/1988 | US4791351 Method and apparatus for rapidly testing passive components by reflectometry in the VHF range |
| 12/08/1988 | DE3718114A1 Verfahren zur feststellung der elektrischen laufzeit von signalstrecken Method for fixed position of the electrical signal term of stretch |
| 12/07/1988 | EP0294225A2 Apparatus for measuring the formation resistivity in earth strata |
| 12/07/1988 | EP0293883A1 Group delay time measurement apparatus with automatic aperture value setting function |
| 12/06/1988 | US4789822 Three-electrode sensor for phase comparison and pulse phase adjusting circuit for use with the sensor |
| 12/01/1988 | WO1988009511A1 Process for determining the electrical duration of signal paths |
| 12/01/1988 | WO1988009510A1 Process for determining the electrical duration of signal sections |
| 12/01/1988 | WO1988009509A1 Method and device for measuring inside diameters |
| 11/30/1988 | EP0293285A1 A method for determining transfer characteristics of an AC calibration device |
| 11/29/1988 | US4788491 Method of the measurement of interstitial atoms in alloys including the hydrogen content of solid hydrides, and of sorbed species on surface |
| 11/29/1988 | US4788490 Method of measuring resistance of a control servovalve |
| 11/29/1988 | US4788488 Continuous condition sensing system |
| 11/29/1988 | CA1245722A1 Method and apparatus for measuring electrical conductivity of a subject |
| 11/29/1988 | CA1245721A1 Frazil ice concentration measuring apparatus |
| 11/23/1988 | EP0291755A1 Method and apparatus for testing an isolation resistance |
| 11/23/1988 | CN88201085U Super accurate megger with short circuit protector |
| 11/23/1988 | CN88100066A Water quality manage method, conductance measuring method and device used in there |
| 11/22/1988 | US4786875 Conductivity measuring circuit |
| 11/22/1988 | CA1245288A1 Differential capacitance detector |
| 11/17/1988 | WO1988008969A1 Method for measurement of amplifier s parameters |
| 11/17/1988 | EP0290513A1 Method for detecting thickness variations in the wall of a current conducting tubular body. |
| 11/17/1988 | DE3813732A1 Circuit for processing a pseudo oscillation signal, particularly for an inductive proximity sensor |
| 11/16/1988 | CN86102535B Metal-aluminium oxide-silicon construction humidity sensor and its fabricating technology |
| 11/15/1988 | US4785235 Shorts testing technique reducing phantom shorts problems |
| 11/15/1988 | US4785234 Determining eccentricity of insulated wire |
| 11/10/1988 | DE3713643A1 Method for determining the time constants of elements such as sensors, measurement value pickups and the like, and device for carrying out the method |
| 11/09/1988 | EP0289766A2 Device for acquiring and/or influencing the operation parameters of motor vehicles having a combustion engine |
| 11/09/1988 | EP0289711A2 Evaluation circuit for an inductive sensor |
| 11/09/1988 | CN87103064A Loop-circuit resistance tester |
| 11/03/1988 | WO1988008543A1 Spurious resonance control for nmr observe coils |
| 11/02/1988 | EP0289062A2 Method and device for measuring the conductivity of a liquid with check of the transfer resistance between an electrode and the liquid |
| 11/02/1988 | EP0288940A2 Lubrication film thickness measuring system and method |
| 11/02/1988 | EP0288704A1 Arrangement for the measurement of an inductance |
| 11/01/1988 | US4782282 Capacitive-type seed sensor for a planter monitor |
| 11/01/1988 | US4782281 Method of measuring the parameters of a resonator |
| 11/01/1988 | CA1244165A1 Subscriber line monitoring circuit |
| 10/27/1988 | DE3731012A1 Ignition circuit tester having a display which is stable despite climatic effects |
| 10/26/1988 | EP0288215A2 Determination of electrical capacitance and resistance |
| 10/26/1988 | EP0288099A1 Method and device for measuring the conductivity of a liquid, with which the influence of polarisation is counteracted |
| 10/25/1988 | US4780664 Corrosion sensor for measuring the corrosion loss and the instantaneous corrosion rate |
| 10/25/1988 | US4780662 Determining eccentricity of insulated wire |
| 10/25/1988 | US4780661 High frequency impedance measuring apparatus using two bidirectional couplers |