A projector system of the present invention includes a projector 10 and a personal computer PC as an information terminal, which communicate with each other via a network connection. During each cycle the processor generates control signals to functional units based on the values in fields of an instruction. The fluid barrier is provided within the cylinder bore, such that chemical fluid flows from the supply conduit through the control valve to one end of the cylinder bore and forces the barrier to displace a fixed volume of fluid.