Automated dispensing and diluting system

B - Operations – Transporting – 67 – C

Patent

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Details

222/2, 226/6

B67C 3/00 (2006.01) G01N 1/38 (2006.01) G01N 35/10 (2006.01) G01N 1/28 (2006.01)

Patent

CA 2034257

ABSTRACT OF THE DISCLOSURE A system capable of automatically dispensing and diluting an accurate volume of a sample is provided. The system comprises a removable nozzle tip for collecting a predetermined volume of the sample, the nozzle tip being inserted into the sample to collect the sample by suction; a nozzle comprising an inner tube and an outer tube onto which said nozzle tip is removably mounted, said nozzle having a liquid passage through which a reagent flows and a gas passage through which a liquid surface-detecting gas flows defined within the nozzle; a sample pump for sucking and discharging the sample and the reagent into and out of the nozzle tip; a first three way valve being switched to the side of the reagent bottle to communicate said reagent bottle with said sample pump or to the side of the nozzle to communicate said sample pump with said nozzle; a plunger pump for sucking and discharging a liquid surface-detecting gas supplied from a gas source; a second three-way valve being switched to the side of said gas source to communicate said gas source with said plunger pump or to the side of said nozzle to communicate, said plunger pump with the nozzle; a pressure sensor provided between said second three-way valve and said gas passage in said nozzle; and a two-way valve provided between said pressure sensor and said gas passage of said nozzle, and in the vicinity of said nozzle. The system may further comprise a controller for controlling the motion of the valves, the pumps, and the nozzle. Also, the system may further comprise an X-Y table on which sample containers containing the samples, the nozzle tips, and the test tubes into which the sample is dispensed are aligned in rows; and a means for traveling the nozzle.

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