Patent ID: 8528427
Filing Date: 2013-09-10
Classification: G01N,Y10T

Abstract:
1. A fluidic system for a flow-type particle analyzer, comprising: a) a flow cell having b) a sample fluid line in fluidic communication with said sample inlet port, for providing a particle-containing sample fluid from a sample fluid container; c) a sheath fluid line in fluidic communication with said sheath fluid inlet port, for providing a sheath fluid from a sheath fluid reservoir; d) an outlet line in fluidic communication with said outlet port; e) a vacuum pump having a controllable power level, in vacuum communication with said outlet line, configured to draw a vacuum in said outlet line, thereby pulling said sample and sheath fluids through said flow cell; f) a first sensor configured to measure a pressure drop from the sheath fluid inlet port to said cuvette outlet port; g) a first control feedback circuit configured to regulate the power of said vacuum pump in response to the pressure drop measured by said first sensor; h) a second sensor configured to measure a pressure drop from said cuvette outlet port to atmospheric pressure; i) a second control feedback circuit configured to regulate the power of said vacuum pump in response to the pressure drop measured by said second sensor; where said sample fluid line or said sheath fluid line comprises a variable-resistance fluidic resistor.