Patent ID: 6861034

Claim:
A biofluid drop ejection system comprising: a biofluid drop ejection unit having an opening corresponding to a reservoir of biofluid in the drop ejection unit; a priming mechanism for priming the biofluid drop ejection unit, the priming mechanism comprising: a vacuum unit which generates a vacuum force; a vacuum nozzle connected to the vacuum unit, the vacuum nozzle located over the opening of the biofluid drop ejection unit; a tubing attached to the vacuum nozzle, and in operational contact with the opening of the biofluid drop ejection unit, wherein the operational contact between the tubing and the opening of the associated drop ejection unit is a vacuum connection, wherein air is vacuumed out of the biofluid drop ejection unit; and a fluid height detection sensor positioned to sense a fluid height within at least one of the tubing and vacuum nozzle.