A pump assembly (12), suitable for use as part of a pumped aspirator (10), the pump assembly (12) comprising: a vacuum pump (38) and a chamber (30), the chamber (30) comprising an inlet (26) connectable, in use, to an aspirator tube (14) and an outlet (34) connected, in use, to the vacuum pump (38), the chamber (30) comprising a hollow interior volume containing a porous or perforated element (32) separating the inlet (26) from the outlet (34), the porous or perforated element (32), when dry, permitting the passage of gas from the inlet (26) to the outlet (34), but when wetted by a liquid, inhibiting or preventing the passage of fluids from the inlet (26) to the outlet (34), wherein the pump (38) is driven by an electric motor (40) connected to a power supply (44) via switch gear of a control circuit (42), and wherein the switch gear is adapted to switch off the motor (38) when the air pressure downstream of the outlet (34) drops below a threshold value. The control circuit may comprise: a current sensor (56) adapted to actuate the switch gear upon detection of a rise in current indicative of the porous or perforated element inhibiting or preventing the passage of fluids from the inlet to the outlet and/or a pressure sensor (48) interposed between the outlet (34) and the pump (38), the pressure sensor (48) being adapted to sense when the threshold value has been reached.Un ensemble de pompe (12), adapté pour utilisation en tant que partie dun aspirateur pompé (10), lensemble de pompe (12) comprenant : une pompe à vide (38) et une chambre (30), la chambre (30) comprenant une entrée (26) pouvant être raccordée, en utilisation, à un tube daspirateur (14) et une sortie (34) raccordée, en utilisation, à la pompe à vide (38), la chambre (30) comprenant un volume intérieur creux contenant un élément poreux ou perforé (32) séparant lentrée (26) de la sortie (34), lélément poreux ou perforé (32), lorsquil est sec, permettant le passage de gaz de lentrée (26) à la sortie (34)
