| Patents for G01R 19 - Arrangements for measuring currents or voltages or for indicating presence or sign thereof (29,850) |
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| 02/25/2009 | CN101373196A Method and apparatus for measuring MgO exoelectron emission current |
| 02/25/2009 | CN101373195A Platform zone power off notifying device |
| 02/25/2009 | CN100464342C Four-quadrant multiplication circuit |
| 02/25/2009 | CN100464196C Single-phase plug type power supply detector |
| 02/25/2009 | CN100464195C Safety and precise fuel cell voltage monitoring apparatus |
| 02/25/2009 | CN100463647C Method for inspecting and re-constructing biophysical field |
| 02/24/2009 | US7496460 Energy source monitoring and control system for power tools |
| 02/24/2009 | US7495455 Stud sensing device |
| 02/19/2009 | WO2009021542A1 Arrangement and method for recognizing a malfunction cause |
| 02/19/2009 | WO2009021390A1 A detection device of shunt lead and a detection method thereof |
| 02/19/2009 | US20090045803 System and Method for Premises Power Parameter and Power-Factor Reporting and Management |
| 02/19/2009 | US20090045802 Polarity tester for an electronic communication port |
| 02/19/2009 | DE202008015560U1 Zangenstrommesser mit verdrehbarer Stromzange Current probe with rotatable clamp meter |
| 02/19/2009 | DE102008036404A1 Einrichtung zum Ermitteln und Ausgeben einer elektrischen Größe Means for detecting and outputting an electrical quantity |
| 02/19/2009 | DE102008022787A1 Leiterplatte zum Erfassen eines Spannungsabfalls Circuit board for detecting a voltage drop |
| 02/19/2009 | DE102007038990A1 Überwachungsvorrichtung zur Überwachung eines Anschlusses einer Anschlusskomponente Monitoring apparatus for monitoring a connection terminal of a component |
| 02/18/2009 | EP1900088B1 Circuit arrangement for detecting zero crossings of an alternating voltage |
| 02/18/2009 | CN201196677Y Vacuum switch insulation monitoring and high voltage electrified locking device |
| 02/18/2009 | CN201196671Y Circuit used for judging transition resistor resistance of circuit protection apparatus |
| 02/18/2009 | CN201196670Y Photo-current and photo-voltage measuring pool |
| 02/18/2009 | CN201196662Y Voice flashing creepage alarm device |
| 02/18/2009 | CN201196661Y Multifunctional AC electroprobe |
| 02/18/2009 | CN201196660Y Vehicle current tester |
| 02/18/2009 | CN201196659Y Portable electric power quality monitoring instrument |
| 02/18/2009 | CN201196142Y Fault detection and indication circuit of air-conditioner compressor |
| 02/18/2009 | CN101371147A Voltage detection device and voltage detection method |
| 02/18/2009 | CN101371146A Voltage detection device and voltage detection method |
| 02/18/2009 | CN101369839A Communication equipment energy-saving method, base station and communication system |
| 02/18/2009 | CN101369399A Circuit test device |
| 02/18/2009 | CN101368992A Test system and method of video signal generator |
| 02/17/2009 | US7493052 Wide dynamic range sensor signal processing method & circuitry for analog and digital information signals |
| 02/17/2009 | US7492562 AFCI temperature compensated current sensor |
| 02/17/2009 | US7492162 Inverter system |
| 02/17/2009 | US7492145 Electric current sensor with a bracket attached to the core on either side of the air-gap and outside of the air gap |
| 02/12/2009 | WO2009021076A1 Slotted current transducer using magnetic field point sensors |
| 02/12/2009 | WO2009020885A1 Wireless remote detector systems and methods |
| 02/12/2009 | WO2009020566A1 Voltage transformation circuit |
| 02/12/2009 | WO2009019825A1 Voltage detecting device and power supply system using the same |
| 02/12/2009 | US20090043521 Transistor circuit with estimating parameter error and temperature sensing apparatus using the same |
| 02/12/2009 | US20090040665 Arc fault circuit interrupter and method of detecting and interrupting a resistive series arc of a power circuit |
| 02/12/2009 | US20090039921 Voltage detecting circuit and battery device using same |
| 02/12/2009 | US20090039869 Cascode Current Sensor For Discrete Power Semiconductor Devices |
| 02/12/2009 | US20090039868 Current sensor |
| 02/12/2009 | US20090039867 Circuit Device and Method of Measuring Clock Jitter |
| 02/12/2009 | US20090039865 Printed circuit board for sensing voltage drop |
| 02/12/2009 | US20090039803 Outer jacket leak detection method and ballast implementing the method |
| 02/11/2009 | EP2021811A1 Measuring device and method for measuring the power of a high frequency signal |
| 02/11/2009 | CN201194290Y Intelligent display electric power plug |
| 02/11/2009 | CN201194022Y Intelligent railway circuit parameter test disc |
| 02/11/2009 | CN201194018Y Indoor optical fiber type high-voltage live display locking apparatus |
| 02/11/2009 | CN201194017Y Apparatus detecting redox potential and temperature in hot water system |
| 02/11/2009 | CN201194016Y AC current detection circuit |
| 02/11/2009 | CN201194015Y Current sampling circuit using constantan wire |
| 02/11/2009 | CN101363896A High precision voltage transient event detection and wave-recording method |
| 02/11/2009 | CN101363879A Electrical level polar conversion device, electric voltage sampling apparatus and electric voltage sampling method |
| 02/11/2009 | CN101363878A Circuit for detecting power supply voltage drop |
| 02/11/2009 | CN101363877A Printed circuit board for sensing voltage drop |
| 02/11/2009 | CN101363876A Current inductor and iron core group thereof |
| 02/11/2009 | CN101362247A Gas shield tungsten electrode argon-arc welding voltage measurement circuit |
| 02/11/2009 | CN100460883C Detection method for testing current in resistance property of lightning arrester |
| 02/11/2009 | CN100460882C Device for detecting charged film surface flow potential |
| 02/11/2009 | CN100460877C Voltage detecting circuit and battery device using same |
| 02/10/2009 | US7489489 Load current sensing technique |
| 02/10/2009 | US7489122 Method and device for measuring voltage |
| 02/10/2009 | CA2353929C Utility metering system having waveform capture for power quality monitoring |
| 02/05/2009 | WO2009018056A1 Method, system, and apparatus for voltage sensing and reporting |
| 02/05/2009 | WO2008118714A3 Circuits, methods and systems for loss-of-signal detection and equalization |
| 02/05/2009 | US20090033412 Remote Audio Amplifier Monitoring System |
| 02/05/2009 | US20090033314 Micro-electromechanical system (mems) based current and magnetic field sensor |
| 02/05/2009 | US20090033313 Method and apparatus for determining a characteristic curve for an electric variable of a wind energy plant |
| 02/05/2009 | US20090033298 Voltage regulator with a hybrid control loop |
| 02/05/2009 | DE102007036837A1 Current measurement, at a low voltage switch, has a measurement resistance integrated into the current conductor with a measurement module on it |
| 02/05/2009 | DE102007036064A1 Battery cell monitoring method for motor vehicle, involves selecting N cells of battery by N plus 1 solid state relays, supplying voltage of cells to analog-to-digital converter, and carrying out selectivity of relays by digital processor |
| 02/05/2009 | DE102007035184A1 Current measuring device for electrical conductor, has circular base bodies with opening and sensor for detecting field generated by current flow, where base bodies have two segments that are detachably connected with each other |
| 02/04/2009 | CN201191687Y Electric power plug of electric vehicle charging device |
| 02/04/2009 | CN201191304Y Electrical energy meter of ultra-wide metering range |
| 02/04/2009 | CN201191303Y DC side high-voltage detection circuit apparatus for permanent magnetic synchronous compressor driver |
| 02/04/2009 | CN101361002A Device and method for converting digital signal with high-voltage swinging to digital signal with low-voltage swinging |
| 02/04/2009 | CN101359037A Method for implementing gradation for battery voltage of mobile terminal and the mobile terminal |
| 02/04/2009 | CN101359026A Full-time-domain voltage stability synthesis assessment method |
| 02/04/2009 | CN101359019A Sampling apparatus and sampling method for resistance current of lightning arrester |
| 02/04/2009 | CN101359018A Sampling apparatus and sampling method for resistance current of lightning arrester |
| 02/04/2009 | CN101359017A Detecting system for resistance current of passive lightning arrester |
| 02/04/2009 | CN101359016A Method for detecting resistance leakage current of lightning arrester without voltage reference |
| 02/04/2009 | CN101359005A Power supply system power supply method for on-line detecting resistance current of lightning arrester |
| 02/04/2009 | CN101359004A Current sensor for measuring inhomogeneity of electric potential distribution of lightning arrester |
| 02/04/2009 | CN101359003A Detection circuit and detection method |
| 02/04/2009 | CN101359002A Potential difference meter using sliding disk |
| 02/04/2009 | CN101358995A Installation structure of sampling valve plate of lightning arrester resistance leakage current |
| 02/04/2009 | CN101358994A Installation structure of sampling valve plate of lightning arrester resistance leakage current and installation method |
| 02/04/2009 | CN101358993A Power supply system for on-line detecting resistance current of lightning arrester |
| 02/04/2009 | CN100458463C High-voltage detecting circuit for saving power consumption on stand-by state |
| 02/03/2009 | US7486082 Anomaly detection in inverter system |
| 02/03/2009 | CA2236823C Concatenated magneto-optic field sensors |
| 01/29/2009 | WO2008031029A3 Sensor, method and system of monitoring transmission lines |
| 01/29/2009 | US20090030558 Wheel alignment head and system with advanced power management |
| 01/29/2009 | US20090027047 Current sensor having sandwiched magnetic permeability layer |
| 01/29/2009 | US20090027039 Power supply |
| 01/29/2009 | US20090026350 Determination of low currents with high dynamic range for optical imaging |
| 01/29/2009 | DE19911098B4 Batteriezellenpaket Battery cell pack |