| 摘要 |
A flow inducer apparatus for positioning in a duct containing a flowing stream for continuously and rapidly receiving a sample of gas from and returning said sample to the flowing stream in said duct. Said apparatus comprises inlet opening means extending around an entire outer circumference of said apparatus to receive the sample of said flowing stream regardless of the rotational disposition of said apparatus in the duct. Said apparatus also comprises an integral discharge aspirator means. The discharge aspirator means is open to the surrounding duct along an entire outer circumference of said apparatus for receiving a portion of said flowing stream regardless of the rotational disposition of said apparatus in the duct. The discharge aspirator means is adapted so that the movement of the stream flowing in the duct tends to draw the sample through the apparatus and thereby provide the energy for operation of the flow inducer.
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