| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 04/21/2009 | US7521920 Measuring device for measuring the output current of a clocked half-bridge circuit |
| 04/21/2009 | US7521919 Measuring device for measuring an electrical current |
| 04/16/2009 | US20090096520 Detector of a radio-frequency signal |
| 04/16/2009 | US20090096440 Methods and Systems for Measurement of Fluid Electrical Stability |
| 04/15/2009 | EP2047589A1 Low power wide dynamic range rms-to-dc converter |
| 04/15/2009 | EP2047284A1 Electric potential sensor |
| 04/15/2009 | EP1721175A4 Portable electric testing equipment |
| 04/15/2009 | CN201222606Y Double-parent PT voltage switching device |
| 04/15/2009 | CN201222580Y Metering socket with wireless control |
| 04/15/2009 | CN201222579Y Plug capable of displaying on-position |
| 04/15/2009 | CN201222245Y Interface device for measuring voltage |
| 04/15/2009 | CN201222081Y Passive non-contact type surface potential probe |
| 04/15/2009 | CN201222080Y Signal conditioning apparatus for debugging transmission/distribution engineering system |
| 04/15/2009 | CN201222079Y Apparatus for remotely measuring thunderbolt current |
| 04/15/2009 | CN201222078Y Novel eleven lines DC potential difference meter |
| 04/15/2009 | CN101408594A Device suitable for monitoring direct-current power supply ripple coefficient |
| 04/15/2009 | CN101408574A Working indicator of electrostatic high-pressure generator |
| 04/15/2009 | CN101408571A Inserted detection circuit |
| 04/15/2009 | CN101408568A Method and device for measuring electrical signal phase of alternating current |
| 04/15/2009 | CN101408565A 35KV power distribution station internal and external over voltage monitoring method based on voltage mutual inductor sample |
| 04/15/2009 | CN101408564A Voltage detection circuit |
| 04/15/2009 | CN101408563A Novel three-phase voltammeter |
| 04/15/2009 | CN101408562A Electrostatic high voltage rapid tester |
| 04/15/2009 | CN101408561A Circuit for detecting output current and average current of parallel connection power source equipment |
| 04/15/2009 | CN101408560A Double-magnetic loop direct current detector |
| 04/15/2009 | CN101408559A Method for preparing sensitive coil of reflection type optical fiber current sensor |
| 04/15/2009 | CN101408558A Minitype optical DC/AC electric field sensor |
| 04/15/2009 | CN100478697C Load current detection method for circuit breaker |
| 04/14/2009 | US7519487 System and method for depth determination of cracks in conducting structures |
| 04/14/2009 | US7519486 Method and apparatus to test the power-on-reset trip point of an integrated circuit |
| 04/14/2009 | US7519484 Power supply monitor |
| 04/14/2009 | US7518411 Data receiving apparatus using semi-dual reference voltage |
| 04/09/2009 | WO2005119280A3 Bi-directional current sensing by monitoring vs voltage in a half or full bridge circuit |
| 04/09/2009 | DE102008040925A1 Method for controlling electric motor by pulse width modulation, involves generating control pulses with reference pulse width repetition factor and temporally varying pulse widths and pulse distances as function of recorded parameter |
| 04/09/2009 | DE102006058966B4 Verfahren und Vorrichtung zum Erfassen von elektrischen Potentialunterschieden Method and apparatus for detecting electric potential differences |
| 04/09/2009 | DE10040246B4 Verfahren und Vorrichtung zur Ansteuerung wenigstens eines Verbrauchers Method and apparatus for controlling at least one consumer |
| 04/08/2009 | EP2044453A2 Device for measuring parameters of an electrical power supply |
| 04/08/2009 | EP2044447A1 Measuring apparatus |
| 04/08/2009 | CN201219238Y Electricity saving device of power supply |
| 04/08/2009 | CN201218842Y Portable positioning tracker |
| 04/08/2009 | CN201218824Y Single slice voltage collection device for fuel cell |
| 04/08/2009 | CN201218823Y Single slice voltage collection device for fuel cell |
| 04/08/2009 | CN201218822Y Electric energy quality on-line monitoring device |
| 04/08/2009 | CN201218821Y EX8 integrated electric power monitoring instrument |
| 04/08/2009 | CN201218820Y High tension equip isolation power supply based on electro-optical transformation |
| 04/08/2009 | CN101405923A Load detector for a dimmer |
| 04/08/2009 | CN101403779A Parameter measuring apparatus and system for high tension power line |
| 04/08/2009 | CN101403778A Self-adapting assembly line type AC parameter measuring method |
| 04/08/2009 | CN101403777A Resistive current tester for great current zinc oxide lightning arrester |
| 04/08/2009 | CN101403772A Voltage detection circuit and oscillator using the same |
| 04/08/2009 | CN101403771A Full-open distribution type electric energy mass parameter monitoring system |
| 04/08/2009 | CN101403770A Direct current flux collection circuit and method |
| 04/08/2009 | CN100477539C Coupler for coupling data signal to power transmission cable |
| 04/08/2009 | CN100476443C Wide-zone electric-net phasor synchronous measuring device with freely-set synchronous time scale |
| 04/08/2009 | CN100476394C Detecting system and method |
| 04/07/2009 | US7516051 Overhead power transmission line conductor selection |
| 04/07/2009 | US7514877 Display panel driving circuit |
| 04/02/2009 | WO2009043044A1 A sampling device and circuit having a single voltage supply |
| 04/02/2009 | US20090088995 Method for determining the linear electrical response of a transformer, generator or electrical motor |
| 04/02/2009 | US20090087725 Temperature compensated current measuring device and battery pack using the same |
| 04/02/2009 | US20090085501 Constant current driver circuit with voltage compensated current sense mirror |
| 04/02/2009 | DE202009000098U1 Strommessanordnung Current-measuring device |
| 04/02/2009 | DE202009000097U1 Strommessanordnung Current-measuring device |
| 04/02/2009 | DE102007039294A1 Identifiable and detectable cable e.g. patch cable, has optical, acoustic, electrical and/or perceptible oscillations producing signal generators electrically and conductively connected with each other by conductors |
| 04/02/2009 | DE10119519B4 Demodulator und Sensorvorrichtung Demodulator and sensor device |
| 04/01/2009 | EP2043239A1 Method in connection with mains side converter |
| 04/01/2009 | EP1636598B1 Apparatus and method for sensing emulator cable orientation while providing signal drive capability |
| 04/01/2009 | CN201215574Y Device for test conductive material of aluminum cell by using large current |
| 04/01/2009 | CN201215572Y Voltage tester with clip |
| 04/01/2009 | CN201215571Y Electricity quantity module |
| 04/01/2009 | CN201215570Y Voltage detecting circuit for battery |
| 04/01/2009 | CN201215569Y Centralized voltage real-time monitoring and management system |
| 04/01/2009 | CN201214434Y Constant pressure shunting clamper of track circuit shunting residual pressure and constant pressure tester |
| 04/01/2009 | CN101399018A Signal control circuit and method, LCD and time schedule controller thereof |
| 04/01/2009 | CN101399008A Converter circuit with restart function and relevant display apparatus |
| 04/01/2009 | CN101398967A Theftproof system and method for electric power facilities of base station |
| 04/01/2009 | CN101398466A Multimeter for conveniently and rapidly testing cut in voltage of diode with different types |
| 04/01/2009 | CN101398459A Method and device for identifying charger type |
| 04/01/2009 | CN101398455A Measuring system and method |
| 04/01/2009 | CN101398452A Computation method of dynamic electric energy index of quality based on 100kHz frequency |
| 04/01/2009 | CN101398447A Zero-crossing detector, edge-impulse transferor and use thereof |
| 04/01/2009 | CN101398446A Temperature compensated current measuring device and battery pack using the same |
| 03/26/2009 | WO2009036726A1 Method for tomographic reconstruction of a measurement variable by specific determination of the measurement points |
| 03/26/2009 | US20090080133 Electronic module for ac/dc coil within an electromagnetic contactor |
| 03/26/2009 | US20090079415 Current detection crcuit and current detection method |
| 03/26/2009 | US20090079263 Hybrid energy conversion system with realtime hybrid power display |
| 03/26/2009 | DE102008035325A1 Verfahren zur Detektion des Vorhandenseins einer Last und Ansteuerschaltung A method for detecting the presence of a load driving circuit and |
| 03/25/2009 | EP2038784A2 Electronic circuitry and method for determination of amplitudes of received signals |
| 03/25/2009 | EP2038669A1 Method for extending the diagnostic capability of current regulators |
| 03/25/2009 | EP2038663A1 An ac current sensor for measuring electric ac current in a conductor and an indicator system comprising such a sensor |
| 03/25/2009 | CN201212906Y Electric vehicle accumulator monitor |
| 03/25/2009 | CN201212903Y Electric leakage alarm device |
| 03/25/2009 | CN201212901Y Short circuit detection device |
| 03/25/2009 | CN201212898Y Probe for electroscope |
| 03/25/2009 | CN101394086A Integrated control apparatus for DC distribution board |
| 03/25/2009 | CN101393263A Anti mirror processing method of distance detecting induction system |
| 03/25/2009 | CN101393247A Sensing method based on multidimensional difference decoupling powerline running state parameter |
| 03/25/2009 | CN101393244A Detecting system |
| 03/25/2009 | CN101393239A Substance surface property parametric analysis system |
| 03/25/2009 | CN101393238A Substance surface property parametric measurement method |