| Patents for G01R 15 - Details of measuring arrangements of the types provided for in groups , or (13,411) |
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| 07/05/1988 | US4755665 Light detector and signal processing circuit |
| 07/05/1988 | US4755036 Apparatus for deflecting light beam |
| 06/30/1988 | DE3708731C1 Electrical circuit arrangement for detecting noise pulses in high-voltage systems |
| 06/29/1988 | EP0272871A2 Liquid crystal voltmeter |
| 06/28/1988 | US4754218 Current sensing apparatus |
| 06/22/1988 | CN87208971U Intelligent measurer for multiple electric parameters |
| 06/16/1988 | DE3641144A1 Peak voltage measuring instrument |
| 06/15/1988 | EP0270821A1 Arrangement for compensation the frequency response of a shunt |
| 06/14/1988 | US4751654 Method of and arrangement for measuring impedances in measuring circuits having programmed memory |
| 06/08/1988 | EP0269827A1 Digital measuring apparatus |
| 06/07/1988 | US4749940 Folded bar current sensor |
| 06/07/1988 | US4749939 Measuring transformer for measuring of a current flowing in an electrical conductor |
| 05/31/1988 | US4748406 Circuit arrangement for controlling a rotary-magnet measuring instrument |
| 05/31/1988 | US4748405 Current sensor arrangement |
| 05/31/1988 | US4748404 Digital measuring device for the quasi-analog indication of measurement values |
| 05/25/1988 | EP0268378A2 A phonic meter for measuring current/force/resistance |
| 05/24/1988 | US4747061 Automatic transfer switch for a wide range of source voltage |
| 05/24/1988 | US4746241 Hinge clamp for securing a sensor module on a power transmission line |
| 05/18/1988 | EP0267595A1 Power supply magnetic shunt for transmission line sensor module |
| 05/18/1988 | EP0267502A1 System for the compensation of the effect of the return current asymmetry on the response of a current measuring shunt |
| 05/18/1988 | EP0267256A1 Optical fibre apparatus and method |
| 05/18/1988 | EP0156659B1 Electric current measuring device using a regularly shaped toroidal solenoid |
| 05/17/1988 | US4745357 Optical interface for a magneto-optical current transducer |
| 05/10/1988 | US4743875 Circuit breaker having a direct current measuring shunt |
| 05/04/1988 | CN87207629U High frequency signal detecting probe |
| 04/27/1988 | EP0264612A1 Current sensor and method for registering the current flux in analysing conductors |
| 04/26/1988 | CA1235748A1 Replica circuit |
| 04/26/1988 | CA1235747A1 Sensing system for measuring a parameter |
| 04/21/1988 | WO1987005692A3 Remote opto-electronic detection device and method for the detection of physical magnitudes |
| 04/21/1988 | WO1987005691A3 Remote opto-electronic detection device for detecting a physical magnitude |
| 04/19/1988 | US4739254 Voltage measuring device of a high voltage metalclad installation |
| 04/19/1988 | US4739252 Current attenuator useful in a very low leakage current measuring device |
| 04/13/1988 | EP0263452A1 Electrical transformer |
| 04/13/1988 | EP0263154A1 Multimeter. |
| 04/12/1988 | US4737786 Measurement circuit suppressing variations in a display using an electric measurement transmitter |
| 04/12/1988 | US4737775 Insulation deterioration monitoring apparatus |
| 04/06/1988 | EP0262430A1 Current transformer device for high-voltage open air installations |
| 04/06/1988 | EP0262293A1 Measuring transformer for the measurement of a current flowing in an electric conductor |
| 04/05/1988 | US4736197 Transit system third rail warning signal |
| 03/30/1988 | EP0262019A1 Test apparatus for very high voltage supply |
| 03/30/1988 | EP0261707A1 Measuring circuit for continuous, accurate measurement of direct and alternating current |
| 03/29/1988 | US4734576 Electro-optic sampler |
| 03/23/1988 | EP0260926A1 Optical fibres |
| 03/17/1988 | DE3703908A1 Method for disconnecting an electrical power source |
| 03/10/1988 | DE3727950A1 Device for carrying out voltage tests and measurements on a medium voltage or high voltage switching installation |
| 03/09/1988 | CN87106298A Dual function dmm display |
| 03/08/1988 | US4730264 Arrangement for detecting measuring data in motor vehicles |
| 03/02/1988 | EP0257972A2 Method and apparatus for compensating fiber optic lead and connector losses in a fiber optic sensor |
| 03/02/1988 | EP0257959A2 Optical fibre measurement apparatus and method |
| 03/01/1988 | US4728887 System for rating electric power transmission lines and equipment |
| 03/01/1988 | CA1233519A1 Electronic demand register |
| 02/24/1988 | EP0256939A1 Current-measuring device |
| 02/24/1988 | EP0256207A1 Watchdog circuit for transmission line sensor module |
| 02/23/1988 | US4727310 Digital volt-ohm meter with audible synthesis of measured values |
| 02/11/1988 | DE3626328A1 Device for the potential-isolated measurement value detection of alternating currents |
| 02/09/1988 | US4724393 Surface potential detector |
| 02/09/1988 | US4724381 RF antenna for transmission line sensor |
| 02/04/1988 | DE3720634A1 Frequency discriminator |
| 02/03/1988 | CN87201296U Ac digital tong-type ammeter |
| 02/02/1988 | US4723220 Apparatus for power measuring and calculating Fourier components of power line parameters |
| 01/28/1988 | WO1988000718A1 Method for remotely detecting an electric field |
| 01/28/1988 | WO1988000717A1 Liquid crystal display |
| 01/27/1988 | EP0254396A1 A direct current magneto-optic current transformer |
| 01/26/1988 | US4721840 Method of sensing current |
| 01/20/1988 | EP0253545A2 Signal measurement |
| 01/20/1988 | EP0253477A1 Arrangement for the detection of high voltages |
| 01/19/1988 | US4720682 Surface electric potential sensor |
| 01/19/1988 | US4720673 Spectrum analyzer and logarithmic amplifier therefor |
| 01/13/1988 | EP0252085A1 Signal processing device with a level adapter circuit. |
| 01/13/1988 | CN87204150U Additional equipment of avometer |
| 01/12/1988 | US4719415 Arrangement for the measurement of the electric voltage parameters of a high voltage conductor |
| 01/12/1988 | US4719412 System for analyzing transients in a non-luminous signal |
| 01/07/1988 | EP0251632A2 Distributed sensor array and method using a pulsed signal source |
| 01/05/1988 | US4717872 Device for monitoring consumption of electrical power |
| 12/29/1987 | US4716364 Monitoring transients in low inductance circuits |
| 12/22/1987 | US4714916 Voltage loss detector |
| 12/22/1987 | US4714893 Apparatus for measuring the potential of a transmission line conductor |
| 12/15/1987 | US4713653 For warning that an exposed member carrying high voltage is live |
| 12/15/1987 | US4713607 Current sensing circuit |
| 12/09/1987 | EP0248517A2 Apparatus comprising Raman-active optical fiber |
| 12/09/1987 | EP0248320A1 Fault current detector |
| 12/09/1987 | EP0248159A1 Current limit sensor for protected electrical devices |
| 12/09/1987 | EP0248152A1 Arrangement for the contactless measuring of an electric current in a conductor |
| 12/09/1987 | CN86203250U Mechanically-regulated adjustable radio frequency signal coupler |
| 12/05/1987 | CN86208630U Pocket circuit breakdown tester for vehicle and household electric appliances |
| 12/05/1987 | CN86207510U Voltage test pencil |
| 12/03/1987 | WO1987007387A1 Optical fibre apparatus and method |
| 12/02/1987 | EP0247842A2 Optical measurement using polarized and unpolarized light |
| 12/02/1987 | EP0247544A1 A monitoring device for overhead power transmission system |
| 12/02/1987 | CN87202534U Test pencil with digital display meter |
| 12/02/1987 | CN87201176U A/d convertor module board for electrotechnical test |
| 11/25/1987 | EP0246433A1 Current attenuator useful in a very low leakage current measuring device |
| 11/25/1987 | CN87206877U Universal avometer |
| 11/25/1987 | CN87103734A Improvement method for voltmeter and amperemeter |
| 11/24/1987 | US4709339 Electrical power line parameter measurement apparatus and systems, including compact, line-mounted modules |
| 11/24/1987 | US4709205 Inductive sensor for current measurement |
| 11/24/1987 | US4709145 Method and apparatus for compensating fiber optic lead and connector losses in a fiber optic sensor by using a dual wavelength optical source and matched polarizer |
| 11/12/1987 | DE3714945A1 Frequency-independent capacitive/resistive voltage divider for measuring high voltages in medium- and high-frequency X-ray generators |
| 11/12/1987 | DE3615557A1 Device for measuring current in a power cable, with the use of optical transmission lines (LWL) |
| 11/10/1987 | US4706017 Electrical current sensor |