G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 1/38 (2006.01) G01N 11/08 (2006.01) G01N 15/06 (2006.01) G01N 33/34 (2006.01) D21H 23/78 (2006.01)
Patent
CA 2416310
The invention relates to a method and a device for measur- ing concentrations especially in a pulp suspension, from which a sample (3) has been taken. The sample (3) is collected in a measuring vessel (2), in which a piston (6) is guided upwards and downwards in order to press the sample (3) from each direction through a measuring sensor (5) connected at the side of the measuring vessel via com- municating tubes (4,4') connected in an upper and an lower position to the measurement vessel (2), whereby the sample (3) is stirred totally for eliminating of a flocculation in the same, whereupon a measurement of the concentration of the sample (3) is made either during the movement upwards or downwards of the piston (6) in the measuring vessel (2) and first when the speed of the sample (3) through the measuring sensor (5) is constant and the sample has been homogenized at least after some movement upwards and downwards of the piston. The device consists of a sample treatment unit (1), in which communicating tubes (4,4') connect the upper (10) and lower (10') por- tion of a measuring sensor (5), in said measuring vessel a piston (6) is guidable upwards and downwards to press the sample (3) through the measuring sensor (5) from each direction and said diameter of said piston (6) mainly corresponds to the inner contour of the measuring vessel (2), the flow rate of the sample being controllable via the speed of the piston and the measurement of the concentration of the sample is practicable both during the movement upwards and downwards of the piston (6).
Fladda Gerdt
Weng Jonny
Btg Kalle Inventing Ab
Fetherstonhaugh & Co.
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