Flow and Concentration Measurement of Process Water and Spent Liquor Pulp is the output material for the production of paper as well for the production of sanitary products such as nappies or tissue paper. The primary raw material for pulp production is wood. To obtain the cellulose fibres contained in the wood, it is mechanically cut up into wood chips. These wood chips are then chemically digested under considerable pressure and at temperatures of around 300 °F in a continuous apparatus for boiling cellulose, where the binding agent lignin is released and removed. Flow measurements are required for process control. In addition to wood and white liquor, water is also a very important raw material for pulp production. Usually, pulp mills pump the required water in significant quantities fr

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