Abstract

The pneumatic micro dispenser system without any dead volume of sample was proposed. The sampling chip and the 10-directional switching valve chip as the component of this dispenser were developed successfully. The sampling chip succeeded to divide liquid every 1μL or 0.5μL without any dead volume of sample only by the decompression and the pressurization operation of the air, due to the novel detecting method of micro fluid and check valves of hat shape. The switching valve chip selects the outlet that injects the dispensed sample. This chip succeeded to switch ten outlets by built-in solenoid (1N,6VDC) under high leakage pressure (≧500kPa).

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