| Patents for G01R 27 - Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom (22,286) |
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| 04/26/1994 | US5307019 Method and apparatus for determining the weld and coil resistances of a motor winding |
| 04/21/1994 | DE4244739A1 Admittance evaluating circuitry for variable measurement capacitance esp. for level gauge probe - includes evaluation circuit controlled by switching signal derived from oscillator and supplied via phase shifter to produce DC signal corresp. to admittance of capacitor |
| 04/21/1994 | DE4235243A1 Variable capacitor admittance measuring appts., esp. for level probe - contains oscillator supplying measurement capacitance and evaluation circuit controlled by switching signal derived from oscillator |
| 04/20/1994 | EP0593007A2 Method of determining electric leakage in unearthed electric networks |
| 04/20/1994 | EP0592485A1 Method and device for extending the dynamic range in measurements carried out with a directional coupler |
| 04/19/1994 | US5304002 Method of determining blend time in stirred tanks |
| 04/14/1994 | WO1994008247A1 Capacitive moisture sensor |
| 04/14/1994 | WO1994008233A1 Device and method for identifying and quantifying layered substances |
| 04/14/1994 | WO1994008207A1 Position sensors |
| 04/13/1994 | EP0591335A1 Measuring dielectric properties of materials |
| 04/13/1994 | CN2161931Y Low potential shielding high voltage megger |
| 04/12/1994 | US5302907 Method of and apparatus for ascertaining a characteristic value of a high-frequency oscillator |
| 04/07/1994 | DE4233110A1 Measuring electrical conductivity of liquids, esp. electrolytes - comparing conductivity values obtained for two different ac current frequencies to detect measurement errors |
| 04/06/1994 | EP0590810A1 Differential conductivity recirculation monitor |
| 04/06/1994 | EP0589974A1 A method and a system for testing capacitive acoustic transducers |
| 04/06/1994 | CN2160917Y High-voltage network insulation monitor |
| 04/06/1994 | CN1084976A High voltage megger for accurate measuring capicitive sample property |
| 04/06/1994 | CN1084975A High voltage megger with anti strong interference function |
| 04/05/1994 | US5300878 Swept signal analysis instrument and method |
| 03/31/1994 | DE4232380A1 Simultaneous measurement of frequency dependent small signal capacitance esp. for MIS - measuring one capacitance for one frequency and capacitance difference for both frequencies |
| 03/30/1994 | EP0588900A1 Method and apparatus for transmitting electromagnetic signals into the earth from a capacitor |
| 03/30/1994 | CN2160119Y Suspending insulator detector |
| 03/29/1994 | CA2037507C Stand-on type resistance tester for electrostatic dissipating shoe equipped persons |
| 03/23/1994 | EP0587646A1 Method and apparatus for displaying multi-frequency bio-impedance |
| 03/23/1994 | CN1084279A High voltage megohm meter with delay short circuit protection |
| 03/23/1994 | CN1084277A 变压器线圈电阻电桥 Transformer coil resistance bridge |
| 03/22/1994 | CA1327994C Apparatus for and method of measuring capacitance |
| 03/17/1994 | WO1994006002A1 Capacitive sensor and method of measuring changes in capacitance |
| 03/16/1994 | CN2159027Y Dielectric strength and high-resistance electric metering instrument |
| 03/16/1994 | CN1083926A Surveying device for friction test of electric contact material |
| 03/15/1994 | US5294889 Battery operated capacitance measurement circuit |
| 03/08/1994 | US5293132 Coating thickness measurement gauge |
| 03/03/1994 | WO1994004935A1 Apparatus for characterizing high temperature superconducting thin film |
| 03/02/1994 | EP0439558B1 Measurement circuit and its use, in particular with inductive position sensors |
| 03/02/1994 | CN2158088Y Testing meter for electric appliances |
| 03/02/1994 | CN1083221A L, C testing circuit and multi-parameter measurer thereof |
| 03/01/1994 | US5291534 Capacitive sensing device |
| 03/01/1994 | US5291140 Mixed domain spectrum measurement method |
| 02/24/1994 | DE4227149A1 Measuring resistance values in temperature sensor - measuring voltages across resistance and reference resistance for null and constant currents |
| 02/23/1994 | EP0583275A1 Signal quality monitoring system |
| 02/17/1994 | WO1994003819A1 Device for measuring the dielectric and magnetic characteristics of materials |
| 02/17/1994 | WO1994003817A1 Moisture sensing method and apparatus |
| 02/17/1994 | DE4326373A1 Fluid alcohol content measurement appts. for liquid fuel - registers the dielectric constant without resonance frequency interference |
| 02/16/1994 | CN1082199A Milliohmmeter or megohmmeter with self-stabilized dc-dc conversion |
| 02/15/1994 | US5287062 Reference voltage measuring bridge for a device for monitoring and measuring the insulation of a DC voltage electrical mains system |
| 02/15/1994 | US5287060 In-tank conductivity sensor |
| 02/09/1994 | EP0582329A1 Device for measuring the water resistivity in a washing machine |
| 02/09/1994 | EP0582279A1 Circuit for exploitating the signal of a capacitive sensor |
| 02/09/1994 | EP0240556B1 High precision capacitance bridge |
| 02/09/1994 | CN2155571Y Universal testing clamp for low-resistance testers |
| 02/08/1994 | US5284142 Three-dimensional impedance imaging processes |
| 02/02/1994 | EP0580947A2 Method for measuring electrical quantities |
| 02/02/1994 | EP0580836A1 Process for determining the quality of a single superconducting film and device for its implementation |
| 02/02/1994 | EP0439590B1 Paint conductivity measurement system |
| 02/02/1994 | CN2155023Y Resistance error ratio tester |
| 02/01/1994 | US5283528 Circuit arrangement for measuring the ratio of the capacitance values of two capacitors |
| 02/01/1994 | US5283519 Operation of inductive distance sensor by scaling output signal by vectorially obtained factor |
| 01/26/1994 | EP0580326A1 Methods and circuits for measuring the conductivity of solutions |
| 01/25/1994 | US5281922 Method for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter |
| 01/21/1994 | CA2085724A1 Load energized electronic test pencil |
| 01/20/1994 | DE4224199A1 Resistance measuring system for parallel take=off drums in electrical wire mfg. - has resistance meter in rotating drum and connected to electrodes and temp. sensor at periphery of drum, with slip rings for supply voltage and data coupling for measured values |
| 01/19/1994 | EP0579586A1 An absolute capacitive encoder |
| 01/19/1994 | EP0578906A2 Circuit for measuring capacitances |
| 01/19/1994 | EP0393068B1 Apparatus and methods for measuring permitivity in materials |
| 01/18/1994 | US5280429 Method and apparatus for displaying multi-frequency bio-impedance |
| 01/13/1994 | DE4140586A1 Controlling current flow through magnet coil of magnetic valve - involves measuring continuously voltage drop over magnet coil and power switch |
| 01/12/1994 | EP0577988A1 Electronic device for controlling a safety system |
| 01/12/1994 | EP0577653A1 Process for finding the transmission properties of an electric line. |
| 01/11/1994 | US5278513 Continuous condition sensing system |
| 01/06/1994 | WO1994000769A1 Apparatus for measuring electrical surface resistivity of a moving web |
| 01/05/1994 | EP0577495A1 Method and device for checking the thickness and regularity of a coating deposited on an elongated insulating body |
| 01/05/1994 | CN2152374Y Inductive wrist base |
| 12/29/1993 | EP0576243A2 Radio frequency measuring apparatus |
| 12/28/1993 | US5274333 Frequency balanced six-port reflectometer with a variable test port impedance |
| 12/28/1993 | US5272817 For a position determination apparatus |
| 12/23/1993 | DE4219970A1 Test circuit with HV generator for electrical appliances operated from single=phase or three=phase mains - has low Ohm sensor and associated current monitoring circuit for checking resistance of current path between ground conductor and housing. |
| 12/22/1993 | CN1023257C Method for determing solute in high-temp. water |
| 12/21/1993 | US5272445 Resistance tester utilizing regulator circuits |
| 12/21/1993 | US5272443 Chatter and profile measuring using capacitor sensors |
| 12/21/1993 | US5272440 Isolation monitors and measuring device for an electrical power system with isolated neutral |
| 12/15/1993 | EP0471684B1 Circuit and process for measuring a value affecting the capacitance-voltage characteristic of a capacitive component |
| 12/09/1993 | WO1993024843A1 Probe and method of measuring ground resistivity |
| 12/09/1993 | DE4220596C1 Transmission factor measuring circuit for variable transmission circuit e.g. differential transformer path sensor - determines factor from difference in period of oscillation of series integrator and comparator oscillator when circuit is connected and disconnected. |
| 12/09/1993 | CA2117792A1 Probe and method of measuring ground resistivity |
| 12/08/1993 | EP0349528B1 A method and measuring system for contactless measuring the values of magnitudes relating to electrically conductive materials |
| 12/08/1993 | EP0334940B1 Method and apparatus for isolating faults in an antenna system |
| 12/07/1993 | US5268852 Self diagnostic pH sensor |
| 12/07/1993 | US5268642 Method and apparatus for measuring electrical conductivity of liquid |
| 12/07/1993 | US5268636 MMIC package and interconnect test fixture |
| 12/02/1993 | DE4217704A1 Combined measuring device for testing earthing of patients and isolation of surgical instruments - has circuit in hand-held device with cable connections to operating table or surgical instrument, contact electrode and low resistance indicator |
| 12/01/1993 | EP0572204A1 Method and apparatus for automated sensor diagnosis |
| 12/01/1993 | EP0533802B1 Insulator aging assessment method |
| 11/25/1993 | WO1993023758A1 Integratable conductivity measuring device |
| 11/24/1993 | EP0570654A1 A remote eart resistance meter |
| 11/23/1993 | US5264797 Device for detecting contaminants on conductive surfaces |
| 11/18/1993 | EP0569572A1 Method of determining electromagnetic impedances in the frequency range between 0 hz and 10 ghz |
| 11/18/1993 | DE4216176A1 Integratable conductivity measurement arrangement for liquids - has current source and current-coupling capacitors for feeding rectangular wave to liq., and voltage measuring circuit consisting of coupling capacitors, operational amplifier and capacitor-switch circuit. |
| 11/17/1993 | CN2146718Y Electronic compensated standard loss factor box |
| 11/17/1993 | CN2146717Y Digital on-line resistance-measuring apparatus |
| 11/16/1993 | US5262730 Apparatus and method for determining the permittivity of samples of material over a wide frequency band |