Patent ID: 6877361

Claim:
A viscosimeter for measuring the relative, intrinsic or inherent viscosity of a solution ( 13 ) in a solvent ( 12 ) with at least one flow resistance ( 15 , 16 ; 27 to 30 ) and one feeding point ( 20 , 21 ; 36 ; 38 ) for the solution to be examined ( 13 ) in a conduit system ( 14 , 22 ; 24 to 26 , 31 ) as well as with respective manometers ( 17 , 18 ; 33 ) on the flow resistance ( 15 , 16 ; 27 to 30 ) which are coupled with a differential amplifier ( 19 ), characterized in that the viscosimeter ( 40 ) shows flow resistances ( 15 , 16 ; 27 to 30 ) with a minimal thickness and with a smaller volume with respect to all other parallel and following capillaries in a flow conduit system with two legs (L 1 , L 2 ) which shows three parallel flow circuits among which at least two flow circuits are connected by a differential pressure sensor or a sensor for differential pressure ( 216 ), whereby the three flow circuits constitute an analogy to a Thomson bridge, whereby the arrangement consists of an inlet ( 201 ) which runs into a first branch point ( 202 ) and divides into two legs (L 1 , L 2 ), whereby the first leg (L 1 ) comprises a first pressure reducing element ( 203 ), a second branch point ( 204 ) which leads to a differential pressure sensor or to a sensor for differential pressure ( 216 ) and a second pressure reducing element ( 205 ) in a feeding conduit which leads to a first junction ( 206 ) which runs into an outlet conduit ( 207 ); and that the second leg (L 2 ) starting from the first branch point ( 202 ) comprises a third pressure reducing element ( 212 ) which leads to a third branch point ( 211 ) which first leads into a big volume vessel ( 210 ) leading to a second junction ( 209 ) and second which leads to a first resistance capillary ( 213 ) which as connected in a third junction ( 215 ) with the differential pressure sensor or the sensor for differential pressure ( 216 ) and which is furthermore connected with a second resistance capillary ( 214 ) in a conduit led from the third junction ( 215 ) to a fourth junction ( 209 ), whereby the second resistance capillary ( 214 ) is connected on the outlet side over the fourth junction ( 209 ) with a pressure reducing element ( 208 ) which runs over a conduit section into the first junction ( 206 ), and thus, into the outlet conduit ( 207 ).