| 摘要 |
Method and device for measuring and regulating the concentration, preferably of a fibre suspension, with the aid of a blade (1) pivotally suspended in the suspension. The blade (1) is caused to pivot such that its trailing end (8) moves between two end positions (A, B) in the suspension for providing a predetermined angular stroke ( alpha ). Time measurement is carried out when the trailing edge (8) of the blade (1) moves through its stroke from its upper end position (A) to its lower end position (B). The time obtained is a parabolic function of the concentration and varies in response to the shear force resistance in the fibre suspension of the blade (1) during its angular stroke, and thus in response to the concentration of solid substances in the suspension. |
