A device that is typically hand-held and used in the laboratory to withdraw, transfer, and inject minute volumes of fluid materials (e.g., microlitres or smaller). This device is electronically operated and can have a single channel or a multichannel piston/cylinder assembly. The device delivers the same volume of substance into one receptacle or several receptacles simultaneously. The device may be factory pre-set to deliver a given volume, or may have user-selectable volumes within a useful volume range. The delivered volume may be digitally displayed.