Patent ID: 8900530

Claim:
A micro-volume liquid dispensing system comprising: (a) a pneumatic module, wherein the pneumatic module comprises: a pressure delivery conduit; a pneumatic pressure generating unit connected to the inlet of the pressure delivery conduit; and a pressure sensor unit and a pressure adjusting unit, which are connected to the pressure delivery conduit sequentially and separate from the pressure generating unit; (b) a micro-dispensing unit connected to the pneumatic module with the pressure delivery conduit; and (c) an electric control circuit for controlling the pneumatic module and the micro-dispensing unit, wherein: the pneumatic pressure generating unit comprises two parallel electromagnetic valves connected to the inlet of the pressure delivery conduit, and an air compressor and a vacuum pump connected to the two electromagnetic valves respectively; the pressure sensor unit comprises two parallel electromagnetic valves connected to the pressure delivery conduit, and a positive and a negative pressure sensor connected to the two electromagnetic valves respectively; and the pressure adjusting unit comprises two parallel electromagnetic valves connected to the pressure delivery conduit, and coarse and fine regulating valves connected to the two electromagnetic valves respectively.