| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 01/10/1990 | EP0349528A1 A method and measuring system for contactless measuring the values of magnitudes relating to electrically conductive materials. |
| 01/03/1990 | EP0349168A2 Circuit element measuring apparatus |
| 01/03/1990 | EP0349043A2 Arrangement for approximately determining the equivalent circuit of a circuit element at high frequencies |
| 01/02/1990 | US4891573 Evanescent mode tester for ceramic dielectric substrates |
| 12/28/1989 | WO1989012820A1 Measurement of moisture content and electrical conductivity |
| 12/26/1989 | US4890236 Method and apparatus for aiding manual instrument settings by displaying estimates of future measurement results |
| 12/20/1989 | EP0347125A2 Parallel plate dielectric analyzer |
| 12/20/1989 | EP0346386A1 Electro-optic measurement (network analysis) system |
| 12/20/1989 | CN1006189B Loop-circuit resistance tester |
| 12/19/1989 | US4888824 Glass container wall thickness inspecting machine |
| 12/19/1989 | US4888701 Apparatus for measuring vector voltage ratio |
| 12/19/1989 | US4888546 Device for measuring seam resistance |
| 12/14/1989 | WO1989012235A1 Charge balanced feedback transmitter |
| 12/13/1989 | CN2049364U Inductance measuring apparatus |
| 12/12/1989 | US4887040 Device for measuring the impedance of a medium along a measurement line |
| 12/12/1989 | US4887024 Person detecting device |
| 12/06/1989 | EP0345181A1 Process and appliance for detecting and recognizing impact by measuring the impedance variation |
| 12/06/1989 | EP0344929A2 Apparatus and method for capacitance measurements |
| 12/05/1989 | US4885708 Apparatus and method for measuring frequency response function |
| 12/05/1989 | US4885529 Identification of fluids and an interface between fluids by measuring complex impedance |
| 12/05/1989 | US4885528 Apparatus which uses a simulated inductor in the measurement of an electrical parameter of a device under test |
| 11/28/1989 | US4884023 Method and apparatus for determining the rotor resistance of a rotating-field machine |
| 11/28/1989 | CA1263442A1 Method and apparatus for the measurement of the properties of sheet- or foil-like material of low electrical conductivity |
| 11/23/1989 | EP0342445A1 Arrangement for the measurement of transfer impedances |
| 11/23/1989 | EP0342349A1 Contour-clamped homogeneous electric field generator |
| 11/21/1989 | US4882742 Method for measuring resistances, in particular resistances of subscriber's |
| 11/21/1989 | US4882537 Method and apparatus for reducing interference in an electrical resistance probe during electrolytic plating |
| 11/21/1989 | US4882535 Device and method for monitoring small desplacements of a peak in a frequency spectrum |
| 11/16/1989 | WO1989011105A1 Circuit for measuring variable inductance |
| 11/14/1989 | US4881025 Frequency dependent identification of materials |
| 11/09/1989 | DE3814852A1 Method and arrangement for network analysis |
| 11/09/1989 | DE3814131A1 Method for measuring a coil with losses and inductive distance sensor constructed in accordance with this method |
| 11/09/1989 | DE3813883A1 Measuring circuit for monitoring insulation resistances |
| 11/07/1989 | US4879512 Circuit for processing a pseudo-oscillatory signal, especially for inductive proximity detectors |
| 11/02/1989 | EP0340017A2 Apparatus and method for determining the permittivity of samples of material over a wide frequency band |
| 11/02/1989 | EP0339873A1 Apparatus and method for measuring electric characteristics of material |
| 11/02/1989 | DE3912795A1 Method for calibrating a network analyser |
| 10/31/1989 | US4878012 Charge balanced feedback transmitter |
| 10/31/1989 | US4878008 Contour-clamped homogeneous electric field generator |
| 10/25/1989 | EP0338413A2 Method and apparatus for testing an airbag restraint system |
| 10/25/1989 | EP0338364A2 Lead impedance scanning system for pacemakers |
| 10/25/1989 | CN2046635U Multi-function electronic megohmmeter |
| 10/24/1989 | US4876515 Self-checking ohmmeter that checks for contact resistance of its probes |
| 10/24/1989 | US4876512 Method for rapidly determining the swelling-clay content in shales and shaly sandstone formations by high-frequency dielectric constant measurements |
| 10/19/1989 | WO1989009846A1 Electrochemically controlled superconductivity |
| 10/18/1989 | EP0337171A1 Method for the contactless measuring of a resistor arranged in the secondary circuit of a transmitter, and device for carrying out the method |
| 10/18/1989 | EP0337117A2 On-line web internal resistivity measuring apparatus |
| 10/18/1989 | CN1036459A Dynamical dielectric analyzer |
| 10/17/1989 | CA1262372A1 Method for the measurement of capacitances, in particular of low capacitances, wherein two references are used |
| 10/11/1989 | EP0336656A2 Method and apparatus for defining test sequences for a signal measurement system |
| 10/11/1989 | EP0336615A1 Electromagnetic flowmeter capable of simultaneous measurement of flow rate and conductivity of fluid |
| 10/10/1989 | US4872344 Method of nondestructive quality control of carbon articles |
| 10/04/1989 | EP0335729A2 Method and apparatus for aiding manual instrument settings by displaying estimates of future measurement results |
| 10/04/1989 | EP0334940A1 Method and apparatus for isolating faults in an antenna system |
| 10/04/1989 | CN2045497U Tester with upper probe and lower probe |
| 10/03/1989 | US4871962 Method for measuring the size of vias |
| 09/27/1989 | CN2045117U High-precision digital high-resistance meter |
| 09/26/1989 | US4870342 Glass container wall thickness inspecting machine |
| 09/26/1989 | CA1261980A1 Signal processing system |
| 09/26/1989 | CA1261002A1 Impedance mismatch detector |
| 09/21/1989 | DE3808304A1 Method and arrangement for measuring transmission characteristics |
| 09/20/1989 | EP0333521A1 System for setting reference reactance for vector corrected measurements |
| 09/20/1989 | EP0332652A1 Method and apparatus for locating leaks in a multiple layer geomembrane. |
| 09/20/1989 | CN2044734U Capacitance tester for universal meter |
| 09/19/1989 | US4868494 Methods and apparatus for frequency response analysis |
| 09/19/1989 | US4868491 Apparatus for monitoring the moisture content of hay as it is being formed into a bale |
| 09/19/1989 | US4868490 Method and apparatus for sheet resistance measurement of a wafer during a fabrication process |
| 09/19/1989 | US4868489 Device to detect the depassivation of an integrated circuit |
| 09/19/1989 | US4868487 Frequency response analyser with multiplying digital to analogue converter |
| 09/19/1989 | US4868411 Signal conversion circuit |
| 09/12/1989 | US4866393 Method of diagnosing the deterioration of a zinc oxide type lightning arrester utilizing vector synthesis |
| 09/12/1989 | US4866391 System and method of simultaneously measuring a multiplicity of grounds on utility poles |
| 09/12/1989 | US4866371 Sample accommodator and method for the measurement of dielectric properties |
| 09/12/1989 | US4866369 Waveguide structure for estimating the electromagnetic characteristics of a dielectric or magnetic material |
| 09/07/1989 | DE3806058A1 Measuring device for resistance measurement |
| 09/05/1989 | US4864513 Potentiometer setting detection by measuring the ratio of RC time constants |
| 08/29/1989 | US4862065 On-line web internal resistivity measuring apparatus |
| 08/29/1989 | US4862062 Glass container inspection machine |
| 08/22/1989 | US4860232 Digital technique for precise measurement of variable capacitance |
| 08/22/1989 | US4859992 Electrostatic system monitor and method therefor |
| 08/22/1989 | US4859942 Circuit arrangement for sensing the displacement of a movable iron core relative to a magnetic coil by measuring the decay time of a constant current flowing through the magnetic coil |
| 08/16/1989 | CN1034811A Construction method of high-precision digital evershed ducter |
| 08/15/1989 | US4858160 System for setting reference reactance for vector corrected measurements |
| 08/15/1989 | US4858141 Non-intrusive appliance monitor apparatus |
| 08/15/1989 | US4857855 Method for compensating for phase of insulation resistance measuring circuit |
| 08/15/1989 | US4857831 Borehole casing diagnostic apparatus and method |
| 08/15/1989 | US4857830 Method for measuring insulation resistance of electric line |
| 08/15/1989 | US4857829 Water-soluble oil property detection device |
| 08/09/1989 | EP0327254A1 Measurement apparatus |
| 08/09/1989 | EP0327138A1 Wide bandwidth R.F. load |
| 08/09/1989 | EP0326992A1 A device for measuring the impedance of a medium along a measurement line |
| 08/09/1989 | EP0146605B1 Method and apparatus for measuring the resistivity of metals |
| 08/08/1989 | US4855668 Flexible probe and sampling device for corrosion measuring |
| 08/08/1989 | US4855667 Parallel plate dielectric analyzer |
| 08/02/1989 | EP0326266A2 Tomographic flow imaging system |
| 08/01/1989 | US4853950 Impedance measuring apparatus for R.F. baseband signals over two wire telephone lines |
| 08/01/1989 | US4853638 Water quality control method, and method and apparatus for measuring electrical conductivity used in the water quality control |
| 08/01/1989 | US4853617 Apparatus having capacitive sensor and metal detector for detecting objects concealed behind surfaces |
| 08/01/1989 | US4853616 Detection of water saturation in insulation at cased road crossings |
| 08/01/1989 | US4853615 Detection of water saturation in insulation at cased road crossings |