Apparatus and method for taking samples

A device for sampling, in particular for withdrawing samples from free-flowing and/or liquid and/or gaseous material,

• comprising a housing having a housing chamber which has two connection openings, spaced apart from one another, for connecting in each case a line portion through which a material flow may flow, the two connection openings in particular having identical opening cross-sections, and
• the device including a withdrawal element which is movable in the housing chamber,
• the withdrawal element being formed, at least in portions, in a profile-like manner, the withdrawal element bounding a hollow sampling region, extending along a profile longitudinal direction course, at the periphery of the sampling region, while leaving an entry opening which in particular is slit-like and which extends along an opening longitudinal direction course,
• guide means being provided by means of which a defined movement pattern of the withdrawal element in the housing chamber 44 is predetermined,
• a line portion being connected to each of the two connection openings, from which one line portion extends horizontally or substantially horizontally, or from which both line portions extend horizontally or substantially horizontally
• wherein the opening longitudinal direction course of the withdrawal element extends, in particular in an even manner, along a geometric spherical surface, and that a movement path or movement pattern of the withdrawal element extends geometrically in a circular direction about a rotational axis.

A method for sampling, in particular for withdrawing samples from free-flowing and/or liquid and/or gaseous material, comprising the following method steps:

• providing a device for sampling, comprising a housing having an inner housing chamber which has two connection openings, spaced apart from one another, for connecting in each case a line portion through which a material flow may flow, the two connection openings in particular having identical opening cross-sections, and
• the device including a withdrawal element which is movable in the housing chamber,
• the withdrawal element being formed, at least in portions, in a profile-like manner, the withdrawal element bounding a hollow sampling region, extending along a profile longitudinal direction course, at the periphery of the sampling region, while leaving an entry opening which in particular is slit-like and which extends along an opening longitudinal direction course,
• guide means being provided by means of which a defined movement pattern or movement path of the withdrawal element in the housing chamber is predetermined, along which at least one of the two opening cross-sections in a projection view perpendicular thereto may be traversed over the entire area by means of the entry opening,
• while a material flow is conducted through the housing chamber by means of the two connection openings, the withdrawal element being moved through the housing chamber, so that the orientation of the withdrawal element in an observation plane which moves with the withdrawal element relative to a geometric intersection line of the observation plane with a nonmoving geometric reference plane which extends perpendicular to at least one opening cross-section, remains the same when the withdrawal element is moved,
• wherein a device is used, for which the opening longitudinal direction course of the withdrawal element extends, in particular in an even manner, along a geometric spherical surface, and for which a movement path or movement pattern of the withdrawal element extends geometrically in a circular direction about a rotational axis (14).