Patent ID: 6857327
Filing Date: 2005-02-22
Classification: G01N

Abstract:
1. A particulate sampler in analyzing particulate matter in exhaust gas from an emission source said sample comprising: a transfer tube assembly including probe at least partially defining a sample exhaust gas passageway having a first end portion with an opening for receiving the exhaust gas from the emissions source and extending to a second end portion said transfer tube assembly includes an outer tube surrounding at least a portion of said probe to define an insulator cavity in to maintain a temperature of the exhaust gas in said sample exhaust gas passageway; a mixer receiving said second end portion said mixer including a dilution gas passageway for carrying a dilution gas with said dilution gas passageway in communication with said sample exhaust gas passageway for introducing dilution gas to the exhaust gas, wherein the mixer includes an end cap arranged about the second end portion removably secured to said transfer tube assembly and said mixer; and a tunnel connected said mixer and including a gas mixing passageway extending a length of homogeneously mixing the gases together with a mixing orifice arranged between said second end portion and said gas mixing passageway, and the exhaust gas and the dilution gas commingling prior to flowing through said orifice to said gas mixing passageway.