US 5611891 A abstract this invention relates to the measurement and control of consistency in an aqueous flow stream as it leaves a stage of the papermaking process more particularly the present invention relates to the measurement used for control of wood fiber and suspended solids in a papermaking pulp stock flow stream application_number US 56958995 A description as discussed earlier fig1 3 schematically represent prior attempts at developing systems to control the consistency of papermaking stock leaving a process stage with reference to the fig4 there is illustrated a papermaking stock consistency control system 40 system 40 includes in part storage tank 4 automatic control valve 6 stock pump 8 consistency controller 10 process stage 12 process additive lines 14 conventional papermaking stock consistency meter 42 and conventional papermaking stock flow meter 44 consistency controller 10 preferably is a microprocessor based controller which is used to calculate downstream consistency control also consistency meter 42 preferably is a microwave consistency transmitter during the operation of papermaking stock consistency control system 40 papermaking stock from stock chest 4 is transported to pump 8 by conventional conduits as discussed earlier during the transportation of the stock from chest 4 to pump 8 it is desirable to measure the consistency of the papermaking stock consistency particularly being defined as a percentage of dry stock in the slurry depending upon the desired consistency of the stock water from dilution valve 6 is used to correct the consistency to achieve the desired consistency after the stock reaches pump 8 the stock is then transported by conventional techniques through meter 42 flow meter 44 and process stage 12 in order to properly control the consistency of the stock exiting process stage 12 consistency meter 42 stock flow meter 44 consistency controller.