Handheld sampling-removal head, analysis arrangement and method for characterizing an aerosol

摘要

In a sampling head (1) of an analysis arrangement (31), provision is made that a sample stream delivered via a sampling line (2) and a dilution air stream delivered through a dilution air inlet (4) are mixed together in a dilution unit (3) in such a way that a volumetric quantity entrained in at least one receiving space moved along by a movable element (8) between the sampling stream and the dilution air stream are exchanged with each other, wherein the analysis arrangement (31) has a gas analyzer (35) for the analysis of the slightly diluted sample stream and a particle determination unit (32) for the analysis of the enriched dilution air stream.

主权项

1. A hand-held sampling head (1) for collecting a sample of an aerosol containing suspended particles, comprising a sampling line (2) and an integrated dilution unit (3) which is connected to the sampling line (2) and which has a dilution air inlet (4), the dilution unit (3) has a first element (6) with a first contact face (7) and a second element (8) with a second contact face (9), which are arranged to be movable relative to each other and which are in flat contact with each other via the respective contact faces (7, 9), a sample channel (10) open toward the second element (8) is formed in the first element (6) in the first contact face (7) and is connected to the sampling line (2), a dilution air channel (11) open toward the second element (8) is formed in the first element (6) in the first contact face (7) and is connected to the dilution air inlet (4) and to a tube for a particle determination unit, and at least one receiving space (14) open toward the first element (6) is formed in the second element (8) in the second contact face (9) in such a way that the receiving space (14), during a relative movement (28) of the first element (6) with respect to the second element (8), is brought into connection successively with the sample channel (10) and with the dilution air channel (11), and the first element (6) and the second element (8) are made from ceramic, and the dilution air inlet (4) is connected to the first element (6) at one end of the dilution air channel (11) on a side of the first element (6) which faces away from the second element (8) and the tube for the particle determination unit is also connected to the dilution air channel (11) on the side of the first element (6) which faces away from the second element (8).