Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


Ever since the inception of paper machines in the industry, the problem of consistency has troubled production efforts. Present sensors are sensitive to flow rate, temperature, additives and freeness as well as consistency. In spite of claims made by various manufacturers, there is still not an instrument on the market guaranteed to maintain calibration for identical uses from mill to mill. From the open type to closed type, sampling or continuous measurement type, each has its problems. A Kenics Static Mixer was evaluated in the Western Michigan University pilot plant for possible use as a consistency sensor. Research on the Mixer indicated it may measure consistency very well. Flow, of course, affects the pressure drop across the Mixer, but freeness does not seem to. More research needs to be done with different pulps at varying freenesses and flows with the use of additives and using a greater range of consistencies.