Patent ID: 7380476

Claim:
A gas sampling bag for connecting to a constant volume sampling passage, the gas sampling bag comprising: a bag main body; a pipe, the pipe being located entirely within the bag main body and extending substantially about the length of the bag main body, the pipe having an opening defining an opening sectional area of the pipe, wherein a plurality of gas inlet/outlet holes are formed on the pipe to allow the gas to flow into/out of the bag main body through the gas inlet/outlet holes, and wherein the plurality of gas inlet/outlet holes are located substantially about the length of the bag main body; and a junction for connecting the opening of the pipe to the constant volume sampling passage, the pipe extending from the junction and extending substantially about the length of the bag main body, wherein the opening size of the gas inlet/outlet holes is set so that the total area of all gas inlet/outlet holes formed in the pipe is essentially not more than the opening sectional area of the pipe to blow out the gas generally uniformly from all gas inlet/outlet holes opened in the pipe and flow the gas into the bag main body while suppressing pressure loss along the pipe.