Noncontacting Electrical Conductivity Sensor for Remote, Hostile Environments

Robert L. Kleinberg, Weng C. Chew, Douglas D. Griffin

Research output: Contribution to journalArticlepeer-review


A device for measuring the electrical conductivity at the surface of a large or semi-infinite body at centimeter scale has been developed. The high frequency noncontacting measurement uses single turn transmitter and receiver loops to generate and detect eddy currents in the material to be probed. Response is linear in conductivity over the four decades of interest in geophysical investigations. The mechanical design of the sensor makes it insensitive to temperature and pressure changes, and to accelerations, impact, and abrasion. Therefore, it is operable in remote, hostile environments such as deep boreholes.

Original languageEnglish (US)
Pages (from-to)22-26
Number of pages5
JournalIEEE Transactions on Instrumentation and Measurement
Issue number1
StatePublished - Feb 1989
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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