Selective media delivery device, especially for sampling the exhaust gas of a combustion engine has a rotating cylindrical body with connection channels for selective connection of two inlets with multiple outlets

摘要

Device for selective supply of media comprises a distributor body (10) with at least one inlet for supply of a second medium (20), at least one outlet (14) leading away a first measurement medium (30) and at least a further outlet (17) for discharge of the second medium. A moveable delivery body (50) has a first channel (51) for selective connection of the first medium with one of the outlets and a second channel (52) for selective connection of the second medium with one or all of the remaining outlets. Optimally the delivery body is a rotating cylindrical slider and the second connection channel has an annular shape. The first medium has a high particle concentration, being derived from the exhaust gas of a combustion engine and the second medium has a low particle concentration as it is taken from the surrounding air.