Patent ID: 6708553
Filing Date: 2004-03-23
Classification: G01N

Abstract:
In a viscosimeter for measuring a relative intrinsic or inherent viscosity of a solution in a solvent with at least one flow resistance and one feeding point for the solution to be examined in a conduit system, and with manometers on the flow resistance which are coupled to a differential amplifier, the improvement comprising the viscosimeter comprising flow resistances in the form of disk-shaped or leaf-shaped Venturi nozzles or different KV flow resistances having thicknesses and volumes smaller than all other parallel and following capillaries in a flow conduit system, the flow conduit system having first and second legs, the first leg having at least three pressure reducing elements in the form of a first capillary, a second capillary and a third capillary, wherein, behind the first capillary following a first branch point, a pressure manometer is provided with a connected bigger vessel, wherein, behind the second and third capillaries which are connected to each other and have different diameters and volumes which correspond to 100 to 1000 times an additional KV flow resistance in the second leg, a second branch point leads to a differential pressure sensor or a sensor for differential pressure followed by a fourth capillary and a fifth capillary having different diameters and being connected with each other up to a fourth branch point in a common outlet conduit, wherein, in the second leg the additional KV flow resistance follows the first branch point and the additional KV flow resistance is followed by conduits which lead to a third branch point on an opposite side of the differential pressure sensor or of the sensor for differential pressure, wherein sixth and seventh capillaries with different diameters and different lengths connected with each other follow the third branch point, wherein the sixth and seventh capillaries join into the common outlet conduit.