| 摘要 |
<p>A sampler (10) for removing a sample of gas from a flue or stack (12) utilizes virtual impactor principles, together with a gas jet ejector (100, 105) to insure that the surfaces are kept free of particles. The gas that is discharged from the sampler (10) for analysis thus is not changed in character by contact with particles that may adhere to surfaces of the sampler.</p> |
