Patent ID: 6962090

Claim:
An exhaust gas measurement system comprising: a probe defining a sample exhaust gas passageway for collecting exhaust gas; a stainless steel canister fluidly connected to said probe for storing the exhaust gas; a pump fluidly interconnected between said probe and said canister for transferring the exhaust gas from said probe to said canister; a pressure mass flow controller fluidly interconnected between said probe and said canister producing a exhaust gas flow measurement corresponding to the flow of the exhaust gas from said probe to said canister; a temperature sensor for sensing a temperature of the exhaust gas proximate to said pressure mass flow controller, said temperature sensor correcting said exhaust gas flow measurement based upon said temperature; a pressure sensor for sensing a pressure of the exhaust gas proximate to said pressure mass flow controller said pressure sensor correcting said exhaust gas flow measurement based upon said pressure; heating device heating said stainless steel canister and said pressure mass flow controller; wherein an exhaust gas analyzer is fluidly connected to said canister; wherein a second pump is fluidly interconnected between said canister and said analyzer for transferring the stored exhaust gas from said canister to said analyzer; and wherein a second pressure mass flow controller fluidly is interconnected between said canister and said analyzer producing a second exhaust gas flow measurement corresponding to the flow of exhaust gas from said canister to said analyzer, further including a second temperature sensor for sensing a second temperature of the exhaust gas proximate to said second pressure mass flow controller, said second temperature sensor correcting said second exhaust flow measurement based upon said second temperature, and a second pressure sensor for sensing a second pressure of the exhaust gas proximate to said second pressure mass flow controller, said second temperature sensor correcting said second exhaust flow measurement based upon said second pressure.