Patent ID: 6483325
Filing Date: 2002-11-19
Classification: D21G,G01N

Abstract:
A sheetmaking system on which a wetstock solution is deposited on a drainage wire, said sheetmaking system including a measurement apparatus for measuring a first property of said wetstock solution on the drainage wire, said measurement apparatus comprising:a first electrode means having a first associated response function to first and second properties of said wetstock solution wherein the first property is the water weight of the wetstock solution and the second property is the resistance or conductivity of the wetstock solution and having a first sensitivity to said first and second properties, said first electrode means detecting changes in resistance to generate first signals that are indicative of changes in said first and said second properties; a second electrode means having a second associated response function to said first and second properties of said wetstock solution and having a second sensitivity to said first and said second properties, said second electrode means detecting changes to generate second signals that are indicative of the changes in said first and said second properties, said first and second response functions are each characterized by dependant multiplicative equations and wherein said second electrode means has a different sensitivity to said first property than said first electrode means and has the same sensitivity to said second property as said first electrode means; and means for calculating the water weight of the wetstock using the ratio of said first signals to said second signals and using predetermined characterization data of a range of rations of first signals to second signals versus the water weight of the wetstock.