Water pressure measurement with time domain reflectometry cables

Charles Dowding*, Fei Chiu Huang, Paul S. McComb

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Attributes of the remote measurement of piezometric water pressure and water level with time domain reflectometry (TDR) techniques are investigated. The evaluation includes a two-wire system for unusually small riser tubes as well as parallel wire and air-filled or hollow coaxial cable for typical installations. Comparison of TDR cable and commercial pressure transducer technology shows coaxial cable TDR systems with distance crimps capable of equaling and exceeding the resolution of pressure transducers. Crimps provide permanent distance markers that allow the TDR system to be self-calibrating.

Original languageEnglish (US)
Pages (from-to)58-64
Number of pages7
JournalGeotechnical Testing Journal
Volume19
Issue number1
StatePublished - Mar 1 1996

Keywords

  • Air-water interface
  • Coaxial cable
  • Multiplexing
  • Piezometer
  • Pressure transducer
  • Remote operation
  • Telemetry
  • Time domain reflectometry
  • Water pressure

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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