DGSI. Durham Geo Slope Indicator

Non-nuclear gauge for determining in-situ water content and density by the TDR method (ASTM D6780). Measures both moisture and density simultaneously on the same soil.

Application:

Acceptance testing for compacted fill or embankments.

For more information:

• Product brochure (English) (PDF, 536 KB)
  Brochure in Spanish / Folletto en español
• ASTM D6780 - Standard Test Method for Water Content and Density of Soil in Place by Time Domain Reflectometry (TDR).
• United States Patent 7040145
• FAQs
• White Paper (PDF, 1.5 MB) explaining the technology and methodology behind this instrument.
• Beta Testing Implementation of Purdue Time Domain Reflectometry (TDR) Method for Soil Water and Density Measurement (5 MB PDF). Final report. Prepared in cooperation with the Indiana Department of Transportation and Federal Highway Administration.
• Verification by direct methods
• Image Gallery

Forms:

Sole Source Statement (PDF, 28 kb)
Spreadsheet for Compaction Test (D 689) with 4-in mold.

Support:

• Operator Manual (PDF, 2 MB)
• Parts List (PDF, 24 KB)
• Tutorial (PDF, 2.5 MB)
• TechNotes - Technical support information.
• List of approved PDAs.
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