HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Persson, M. Articles by Wraith, J. M. Search for Related Content PubMed Articles by Persson, M. Articles by Wraith, J. M. GeoRef GeoRef Citation Agricola Articles by Persson, M. Articles by Wraith, J. M. Related Collections Soil Methods/Instrumentation Soil Physics

Notes

Shaft-Mounted Time Domain Reflectometry Probe for Water Content and Electrical Conductivity Measurements

^a Dep. of Water Resources Engineering, Lund University, Box 118, SE-221 00 Lund, Sweden
^b Land Resources and Environmental Sciences, Montana State University, P.O. Box 173120, Bozeman, MT 59717-3120
* Corresponding author (magnus.persson{at}tvrl.lth.se)

Received 21 February 2002.

A new shaft-mounted time domain reflectometry (TDR) probe design is described and evaluated. In contrast to previous shaft-mounted TDR probes (SMPs), the new design may be used to measure both dielectric constant (K_a) and bulk electrical conductivity (_a). Two SMP prototypes, 0.03 and 0.04 m long and having diameters of 0.006 m, were evaluated. The probes were calibrated in several fluids having different K_a and _a. A primary advantage of the SMP is minimal physical probe length without sacrificing accuracy of K_a readings. Accuracy of K_a measurements for the new probes was similar to that of standard 0.20-m-long three-rod probes.

Abbreviations: PVC, polyvinyl chloride • SMP, shaft-mounted TDR probe • TDR, time domain reflectometry

This article has been cited by other articles:

				M. Lungal and B. C. Si Coiled Time Domain Reflectometry Matric Potential Sensor Soil Sci. Soc. Am. J., August 20, 2008; 72(5): 1422 - 1424. [Abstract] [Full Text] [PDF]

				M. Persson, J. M. Wraith, and T. Dahlin A Small-Scale Matric Potential Sensor Based on Time Domain Reflectometry Soil Sci. Soc. Am. J., February 27, 2006; 70(2): 533 - 536. [Abstract] [Full Text] [PDF]

				M. Persson Estimating Surface Soil Moisture from Soil Color Using Image Analysis Vadose Zone J., November 11, 2005; 4(4): 1119 - 1122. [Abstract] [Full Text] [PDF]

				M. Persson, S. Haridy, J. Olsson, and J. Wendt Solute Transport Dynamics by High-Resolution Dye Tracer Experiments--Image Analysis and Time Moments Vadose Zone J., August 16, 2005; 4(3): 856 - 865. [Abstract] [Full Text] [PDF]

				D. A. Robinson, D. A. Robinson, S. B. Jones, J. M. Wraith, D. Or, and S. P. Friedman A Review of Advances in Dielectric and Electrical Conductivity Measurement in Soils Using Time Domain Reflectometry Vadose Zone J., November 1, 2003; 2(4): 444 - 475. [Abstract] [Full Text] [PDF]

				M. Persson and S. Haridy Estimating Water Content from Electrical Conductivity Measurements with Short Time-Domain Reflectometry Probes Soil Sci. Soc. Am. J., March 1, 2003; 67(2): 478 - 482. [Abstract] [Full Text] [PDF]