GAS STREAM CONDITIONING APPARATUS, SYSTEM AND METHOD FOR USE IN MEASURING PARTICULATE MATTER

摘要

A conditioner (12), system (10) and methods for conditioning a sample gas stream (14) for particulate matter measurement purposes employs a sample gas stream conduit (18) having an inlet (20) and an outlet (22) and a sample gas stream conditioner (12) in communication with the sample gas stream conduit. The sample gas stream conditioner includes a moisture control system (26, 30), wherein the moisture control system regulates a humidity level of the sample gas stream (14) flowing through the sample gas stream conduit (18) to maintain a selectable humidity level at the particulate matter collector. A particulate matter measurement instrument (32) is in communication with the sample gas stream outlet (22) and measures the particulate matter in the sample gas stream (14). Alternative methods for regulating the humidity level at a particulate matter collector in the measurement instrument (32) are also disclosed.