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Wagner Hosts Drying Quality Control Seminar

Wagner Hosts Drying Quality Control Seminar

By Staff
Date Posted: 5/1/2008

            Wagner Electronic Products, which manufactures equipment to measure moisture content in lumber, hosted a drying quality control seminar at the Wood Technology Show in Portland, Ore. recently.

            The seminar included presentations on density-compensated moisture measurement technology and the utilization of a patented model for statistical process control on ‘lognormal’ moisture data.

            Density-compensated moisture measurement will significantly increase the accuracy of lumber moisture measurement compared to the ASTM oven dry standard, according to Wagner. The system based on this utilizes low-level gamma energy to measure the density of each piece of lumber, then uses a proprietary algorithm to calculate true moisture content.

            Moisture data from dried lumber often does not exhibit a ‘normal’ statistical distribution, so standard statistical indicators may not apply. The patented model developed by Wagner and the University of British Columbia implements statistical process control with ‘lognormal’ moisture data.

            Some people in the seminar audience acknowledged that the industry is ready to move to a better, more accurate method for measuring moisture content in lumber. “Now we are going to know the truth about moisture content,” said one.

            The seminar featured presentations by Gavin Wallace of the Geologic and Nuclear Sciences Institute of New Zealand, Oregon State University associate professor Michael Milota, and Catalin Ristea, research project manager at the University of British Columbia.

            For more information, call Wagner Electronics at (800) 944-7078 or visit


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