Patent ID: 6276195
Filing Date: 2001-08-21
Classification: G01N

Abstract:
An apparatus for measuring the viscosity of a solution, comprisingan input tube for transporting the solution, said solution having a flow Q;a flow splitter in fluid communication with and downstream from the input tube, for diverting the flow Q into flow streams Q1 and Q2;a first tube having a geometric resistance R1 located in stream Q1 downstream from the flow splitter;a delay volume D1 located in stream Q1 downstream from said first tube;a second tube having a geometric resistance R2 located in stream Q2 and downstream from the flow splitter,a third tube having a geometric resistance R3 located in stream Q1 and downstream from delay volume D1;a first transducer T1 having means to measure the pressure difference across said third tube, transducer T1 generating a signal proportional to the pressure difference across said third tube;a second transducer T2 having means to measure the pressure difference across said second tube, transducer T2 generating a signal proportional to the pressure difference across said second tube;signal handling means for processing the signals from transducers T1 and T2 and generating thereby the relative viscosity information for the solution, and the relative flow information for the solution flow.