Skip to Main Content
Method for the measurement of forest duff moisture contentAuthor(s): Peter R. Robichaud; Roger D. Hungerford; David S. Gasvoda
Source: U.S. Patent 6,078,181. June 20. Arlington, VA : U.S. Patent and Trademark Office. 9 p
Publication Series: Miscellaneous Publication
PDF: View PDF (865 KB)
DescriptionAn apparatus and method for the moisture content measurement of compressible materials using pressure to firmly hold surface probes against the material to be measured. The apparatus uses moisture measurement circuitry employed in frequency domain impedance or time domain reflectometry devices to obtain moisture content readings from materials. These moisture content readings are based on the apparent dielectric constant of the measured material. Subsurface air voids or gaps found in loose, layered materials undesirably influence moisture measurement readings by reducing the apparent dielectric constant of the measured material. Pressure is supplied through the apparatus to the material in the proximity of the surface probes, thereby reducing air voids to enhance measurement accuracy. The apparatus and method are especially useful for compressible organic materials such as forest duff, hay and soil.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationRobichaud, Peter R.; Hungerford, Roger D.; Gasvoda, David S. 2000. Method for the measurement of forest duff moisture content. U.S. Patent 6,078,181. June 20. Arlington, VA : U.S. Patent and Trademark Office. 9 p
Keywordsduff moisture content, forest litter, measurement, apparatus, probes
- Apparatus and method for the measurement of forest duff moisture content
- Measuring the Moisture Content of Green Wood Using Time Domain Reflectometry
- Electric moisture meters for wood
XML: View XML