Patent ID: 6929715

Claim:
A method for measuring concentration especially in a pulp suspension, from which a sample has been taken, characterized in that the sample ( 3 ) is collected in a measuring vessel ( 2 ), in which a piston ( 6 ) is guided upwards and downwards in order to press said sample ( 3 ) in the upwards and downwards direction through a measuring sensor ( 5 ) connected at the side of the measuring vessel via communicating tubes ( 4 , 4 ′) connected in an upper and lower position to the measuring vessel ( 2 ), whereby the sample ( 3 ) is stirred totally for eliminating flocculation in the sample, whereupon a measurement of the concentration of the sample ( 3 ) is made either during upward movement or downward movement of the piston ( 6 ) in the measuring vessel ( 2 ); and wherein measurement of the concentration of the sample is made only when the speed of the sample ( 3 ) through the measuring sensor ( 5 ) is constant and the sample ( 3 ) has been homogenized as a result of the upwards and downwards movement of the piston.