Measuring moisture, fiber, and titanium dioxide in pulp with impedance spectroscopy

In a new measurement technique, impedance spectroscopy is used with fringing electric field sensors to measure the concentration of moisture, fiber, and titanium dioxide in pulp. This method can be integrated into a paper machine without disrupting the manufacturing process because the measurements are taken without contacting the pulp. Experimental results show consistent accuracy is when the moisture concentration is from 94% to 86% and the concentration of other constituents in the pulp is between 0% and 7%. The calibration procedure can be implemented with only a few experimental data points.