Moisture Equipment

The Agricultural Marketing Service (AMS), Federal Grain Inspection Service (FGIS) uses the Unified Grain Moisture Algorithm (UGMA) to achieve its primary objective under the U.S. Grain Standards Act to 'certify the quality of grain as accurately as practical' as well as provide accurate information on storability, economic value and product yield. (7 U.S.C. Sec. 74(b)(2) and (b)(3)(B), (C), and (E)). Moisture meters are used to determine the amount of moisture within grain presented for sale, a critical assessment of quality that affects the value and storability of the grain.

Official Moisture Meters for All Officially-Inspected Grains and Commodities

  • DICKEY-JOHN GAC 2500-UGMA
  • Perten AM 5200-A

Official Moisture Calibrations

Plots and statistics

Official Moisture Meter Checktest Procedures

Technical Reference Materials

Scientific Publications (Available on Request)

  • UGMA First Research Report (GIPSA 2001)
  • UGMA Development Overview (IQGC 2004)
  • UGMA Unified Parameter Development (IQGC 2004)
  • UGMA Development Report 2006 (MST 2006)
  • UGMA Effects of Test Cell Loading Methods (ISEMA 2011)
  • UGMA Secondary Density Correction (ISEMA 2011)

Contact

Cathleen.A.Brenner@ams.usda.gov