Abstract: A method and a device for determining the amount of fill volume in a container. A mass of polarizable liquid in a container is positioned within the measurement region of a shielding antenna and a measuring pulse antenna. The shielding antenna is connected to both a measuring device that measures a time-dependent voltage value of an external interference signal and to a compensation signal generator that generates a time-dependent compensation signal compensating this interference signal. The measuring pulse antenna is connected to both a measuring pulse generator that generates a polarization signal to transmit to the fluid fill in the container and to a second measuring device that measures a response signal to derive the mass of the fluid from said response signal.

Abstract: An apparatus and method for inserting a stopper into a medical syringe minimizing the amount of entrapped air between the stopper and the contained liquid. The apparatus in a first embodiment utilizes a vacuum to assist inserting the stopper within the syringe. In a second embodiment a vacuum is used to transport the stopper and cause the insertion into the syringe. This method eliminates a mechanical device that transports the stopper to the syringe.