The invention relates to a vacuum dispensing unit comprising: a main vacuum line (11) including an inlet (11a) and an outlet (11b)； at least one vacuum pump (4)； an auxiliary vacuum bleed line (12) fluidly connected, via an upstream end (12a), to the main vacuum line (11) and, via a downstream end (12b), to the vacuum pump (4)； a pressure sensor (10) comprising a gas pressure port fluidly connected to the main vacuum line (11)； and a control system (5) connected to the pressure sensor (10), which controls the vacuum pump (4) in response to at least one pressure measurement taken by the pressure sensor (10) in the main vacuum line (11).
