Abstract: The invention relates to a device for collecting particles in an airflow, comprising a casing (2) with a vacuum chamber (4) arranged at the top of the casing, which vacuum chamber has a connection (10) to a vacuum source and is connected to a cyclone device (6) for separating and transporting the particles from the airflow to a collection drum (8) arranged at the bottom of the casing. Said cyclone device (6) has an inlet (11) for the particle-containing airflow and an outlet (18) leading to the collection drum (8). A bag (22) can be attached to said outlet (18) in the collection drum (8) which has a casing (30), which can be closed off (32) in such a way that it provides a seal against the atmosphere around such an attached bag (22).