Patent ID: 9592483
Date: 2017-03-14
CPC Classifications: B01F,G01N,G05D

Claim:
1. A system for mixing deionized water and sheath fluid concentrate comprising: a first container to contain deionized water; a second container to contain concentrated sheath fluid having a first concentration, wherein the first container and the second container are configured to simultaneously contain different fluids; a pressurized reservoir; a valve that has a first input, a second input, and an output, wherein: a pump that is fluidically interposed between the valve and the pressurized reservoir and configured to flow deionized water in the first container and concentrated sheath fluid in the second container into the pressurized reservoir at a flowrate that is sufficiently slow that substantially no bubbles form in the pressurized reservoir; and a controller that is configured to maintain a concentration of a mixture of the deionized water and the concentrated sheath fluid in the pressurized reservoir such that the mixture has a concentration of sheath fluid less than the first concentration by repeatedly switching the valve between the first position, thereby supplying a first amount of deionized water by the pump to the pressurized reservoir, and the second position, thereby supplying a second amount of concentrated sheath fluid by the pump to the pressurized reservoir.