Patent ID: 7777476
Filing Date: 2010-08-17
Classification: G01N

Abstract:
1. A multichannel particle counting device comprising: a plurality of microfluidic channels for dividing a first reservoir and a second reservoir, and for maintaining fluid communication between the first and second reservoirs; each microfluidic channel including a control electrode, wherein each control electrode is substantially electrically isolated from any other control electrode; each control electrode encoded to respond to a specific frequency; the first and second reservoirs together including one set of detection electronics including a first electrode in electrical communication with a power supply and a second electrode in electrical communication with a measuring circuit; the one set of detection electronics being the collector for each signal from each control electrode and having a means to deconvolute the collected signals; the reservoirs containing an electrolyte solution containing particles to be counted; and a means for creating a net fluid flow of electrolyte from one reservoir to the other reservoir through the microfluidic channels.