| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
|---|
| 06/03/1980 | US4206402 System and method for detecting leakage in a pipeline or tank |
| 06/03/1980 | US4206398 Method of and apparatus for detecting ground faults in isolated power supply systems |
| 06/03/1980 | CA1078923A1 Moisture content meter |
| 05/27/1980 | US4204545 Limb blood flowmeter |
| 05/27/1980 | US4204432 Acoustic insulation measurement apparatus |
| 05/27/1980 | CA1078458A1 Compensation indicator for attenuation probe |
| 05/27/1980 | CA1078210A1 Servoed linear accelerometer |
| 05/21/1980 | EP0015253A4 A transducer for sensing a variable parameter and for converting a so-obtained analog signal to a digital signal. |
| 05/20/1980 | US4204155 Automatic four-point probe |
| 05/14/1980 | EP0010861A1 System for protecting an offshore structure |
| 05/14/1980 | EP0010823A1 Methods of and apparatus for measuring electrical conductivity |
| 05/13/1980 | US4203142 Ground fault system and method of detection |
| 04/29/1980 | US4200840 Dual detection scheme for compressive receivers |
| 04/29/1980 | US4200836 Apparatus for measuring insulation resistance in an operating three-phase ungrounded transmission line system |
| 04/29/1980 | US4200835 Method and apparatus for measuring the insulation resistance of an operating grounded transmission line system |
| 04/16/1980 | EP0009486A1 Apparatus for measuring mono-, bi- and tripolar short-circuit currents on low voltage net works |
| 04/15/1980 | US4198598 Swept frequency circuit for precision gain or loss measurements |
| 04/08/1980 | CA1075312A1 Conductivity measuring instrument having linearization means and a digital read-out |
| 04/01/1980 | US4196475 Method of and apparatus for automatic measurement of impedance or other parameters with microprocessor calculation techniques |
| 04/01/1980 | US4196385 Method and apparatus for measuring the concentration of fluids |
| 03/25/1980 | CA1074400A1 Apparatus for testing the shaft/bearing insulation of a turbo-machine |
| 03/11/1980 | US4193063 Differential capacitance measuring circuit |
| 03/11/1980 | US4193027 Microwave moisture-profile gauge |
| 02/26/1980 | US4190827 Multichannel salinity meter |
| 02/26/1980 | CA1072635A1 Ohmmeter for circuits carrying unknown currents |
| 02/19/1980 | CA1072184A1 Apparatus and method for detecting a substance in a fluid medium |
| 02/12/1980 | US4188574 AC Detector for DC ground faults and high capacitance in high-voltage DC power supplies |
| 02/12/1980 | US4188123 Optically measuring the carrier concentration in a semiconductor |
| 02/12/1980 | CA1071712A1 Method and apparatus for detecting elements |
| 02/06/1980 | EP0007907A1 Audible voltage-impedance tester |
| 02/06/1980 | EP0007408A1 Device for the contactless measurement of the resistance of thin layers of material |
| 02/05/1980 | US4187525 Ground fault protective apparatus of field windings |
| 02/05/1980 | US4187460 Capacitance measuring by comparison to reference capacitance |
| 02/05/1980 | US4187459 Digital measurement of impedance ratios |
| 01/15/1980 | US4184112 Capacitor testing apparatus |
| 01/15/1980 | CA1069976A1 Electrolytic measurement system |
| 01/08/1980 | US4182314 Multi-channel vascular flow monitoring system |
| 01/01/1980 | US4181881 Electrical impedance measuring apparatus for providing separate measurements of the conductivity and dielectric coefficient of various materials |
| 01/01/1980 | US4181880 Linear ground conductivity measuring system |
| 12/25/1979 | CA1068515A Method and apparatus for determining the weight and moisture content of materials |
| 12/18/1979 | US4178793 Apparatus for oxygen sensor impedance measurement |
| 12/18/1979 | CA1068375A1 Transducer for converting a varying reactance signal to a dc current signal |
| 12/04/1979 | CA1067580A1 Circuit for measuring the ground resistance of an ungrounded power circuit |
| 11/27/1979 | US4176313 Analyzing electrical circuit boards |
| 11/27/1979 | US4175441 Gauge for measuring distance to planar surfaces and thicknesses of planar members |
| 11/20/1979 | US4175253 Analyzing electrical circuit boards |
| 11/13/1979 | US4174498 Apparatus and method for providing separate conductivity, dielectric coefficient, and moisture measurements of particulate material |
| 11/06/1979 | US4173736 Capacitance detecting system and method for testing wire connections |
| 11/06/1979 | US4173735 Contact fault detector |
| 10/04/1979 | WO1979000721A1 Method and system for detection of thin metal layers in packaged articles |
| 09/25/1979 | US4169243 Remote sensing apparatus |
| 09/18/1979 | US4168466 Moisture tester |
| 09/18/1979 | US4168465 Tapered hole capacitive probe |
| 09/11/1979 | US4167697 Capacitive pick-off circuit |
| 09/04/1979 | US4166974 Apparatus and method for measuring capacitive energy |
| 09/04/1979 | US4166973 Method and system for detection of thin metal layers in packaged articles |
| 08/28/1979 | US4166244 Leakage detection system for radioactive waste storage tanks |
| 08/28/1979 | CA1061409A1 Method and apparatus for testing transmission lines |
| 08/23/1979 | WO1979000545A1 Apparatus for measuring mono-,bi-and tripolar short-circuit currents on low voltage net works |
| 08/21/1979 | US4165483 Capacitive pick-off circuit |
| 08/14/1979 | US4164145 Self-powered electrical meter for display of a liquid-level or the like measurement |
| 08/14/1979 | CA1060545A1 Method and apparatus for determining boiler water conductivity |
| 07/24/1979 | US4162500 Ridged waveguide antenna submerged in dielectric liquid |
| 07/17/1979 | US4161691 Multi-purpose digital measuring apparatus |
| 07/12/1979 | WO1979000389A1 Audible voltage-impedance tester |
| 07/10/1979 | US4161029 Automatic transient response analyzer system |
| 07/10/1979 | US4160949 Auto-zeroed ohmmeter |
| 07/10/1979 | US4160946 Device for measuring conductivity of a solution |
| 07/03/1979 | US4160206 Audible voltage-impedance tester |
| 07/03/1979 | CA1057823A1 Method for the noncontacting measurement of the electrical conductivity of a lamella |
| 06/26/1979 | US4159501 Method and apparatus for indicating the leakage resistance in an electrical system |
| 06/19/1979 | US4158806 Method of checking the state of the lining of a melting unit and device for effecting same |
| 06/19/1979 | CA1056915A1 Method and apparatus for testing conductivity using eddy currents |
| 06/19/1979 | CA1056914A1 Multiple-frequency permittivity tester |
| 06/13/1979 | EP0002387A1 Electric power system fault warning arrangements |
| 06/12/1979 | CA1056457A1 A.c. capacitance measuring bridge |
| 06/12/1979 | CA1056456A1 System and method of measurement of insulation qualities of three-phase power equipment |
| 06/05/1979 | CA1056013A1 Method of detecting heater resistance independent of contact resistance |
| 05/29/1979 | US4156843 Microwave moisture indicator and control |
| 05/29/1979 | US4156842 Immitance measurement with high frequency injection and electromagnetic coupling |
| 05/29/1979 | US4156841 Contact fingers for a testing apparatus for surface insulation resistivity |
| 05/22/1979 | US4156181 Ratio circuit |
| 05/22/1979 | US4156179 Electrical conductivity indicators and/or methods of using same |
| 05/17/1979 | WO1979000257A1 Identification of materials using their complex dielectric response |
| 05/16/1979 | EP0001919A1 Identification of materials using their complex dielectric response |
| 05/15/1979 | CA1054679A1 Automatic measurement and display of resonance frequencies of seismic detection elements |
| 05/15/1979 | CA1054678A1 Microwave aerosol waterometer |
| 05/08/1979 | US4153873 Transducer for converting a varying analog current signal to a binary digital signal |
| 05/01/1979 | US4152641 Method and apparatus for the determination of signal pickup qualities of a stylus of a capacitive disc video player |
| 05/01/1979 | CA1053757A1 Ground fault detector |
| 04/24/1979 | US4151460 High resistance ground fault detector and locator for polyphase electrical systems |
| 04/19/1979 | WO1979000194A1 Transducer for converting a varying analog current signal to a binary digital signal |
| 04/17/1979 | CA1052886A1 Capacitive thickness gauging |
| 04/17/1979 | CA1052864A1 Dual channel dynamic line isolation monitor |
| 04/17/1979 | CA1052862A1 Battery state of charge gauge |
| 04/10/1979 | US4149231 Capacitance-to-voltage transformation circuit |
| 04/10/1979 | CA1052455A1 Liquid leakage capacitive sensing probe |
| 04/03/1979 | US4147050 Apparatus for testing a capacitance responsive gaging system |
| 03/27/1979 | US4146834 Admittance measuring system for monitoring the condition of materials |
| 03/20/1979 | CA1051091A1 Well casing corrosion meter |