Patent ID: 8302495

Claim:
A diluting sampler for collecting a gaseous sample disposed at a temperature substantially higher than the normal temperature from a sample space, the sampler comprising: a sampling tube having a first end for introducing a flow of sample into the sampling tube as well as a second end; and a diluter for receiving the flow of sample from the second end of the sampling tube and for diluting the sample, the diluter comprising a tubular: gas permeable first jacket forming a sample channel, into which the second end of the sampling tube opens; and gas tight second jacket enclosing the first jacket and forming between the first jacket and the second jacket a dilution gas space for the dilution gas to be introduced through the first jacket into the sample channel, the second jacket being connected by its end situated on the side of the sampling tube to the sampling tube at a first connecting point; wherein the outer diameter of the second end of the sampling tube is smaller than the inner diameter of the first jacket; wherein the second end of the sampling tube projects into the first jacket to a second distance from the first connecting point for directing the dilution gas to form a substantially laminar protection flow disposed longitudinally to the sample channel and enclosing the flow of sample; wherein the diluter comprises a gas tight third jacket enclosing the second jacket and forming between the second jacket and the third jacket a cooling agent space for cooling the dilution gas with a cooling agent to be introduced into the cooling agent space, the third jacket being connected by its end situated on the side of the sampling tube to the second jacket at a second connecting point; and wherein the second connecting point is disposed at a first distance from the first connecting point in the longitudinal direction of the sample channel, the first distance preferably having at least the size of the second distance for arranging a heat transfer connection between the sample space and the dilution gas space.