Patent ID: 8587784

Claim:
An optical analysis device ( 100 ) for analyzing a medium in the measurement volume, comprising a housing ( 108 ) having an opening ( 21 ); a flange ( 10 , 10 ′) for holding the housing ( 108 ) in a reception opening of the measurement volume; and an optical analysis unit in the housing ( 108 ) for the optical analysis of a medium in the measurement volume through the opening ( 21 ), further comprising: a fastening stub ( 20 ) provided at the housing and including the opening ( 21 ) for fastening the housing ( 108 ) in the flange ( 10 , 10 ′), with the fastening stub ( 20 ) having an outer geometry which is matched to the inner geometry of the flange ( 10 , 10 ′) such that it can be displaced in the flange ( 10 , 10 ′) in the direction of the measurement volume and away from it; and a clip ( 30 ) with which the flange ( 10 , 10 ′) and the fastening stub ( 20 ) can be connected to one another in shape-matched and/or force-transmitting manner in different positions of the fastening stub ( 20 ) in the flange ( 10 , 10 ′), wherein the flange ( 10 , 10 ′) has a radially outwardly facing prolongation ( 34 ) at its outer periphery and the clip ( 30 ) has a radially inwardly facing prolongation ( 35 ) such that the inwardly facing prolongation ( 35 ) of the clip ( 30 ) can engage around the outwardly facing prolongation ( 35 ) of the flange.