| 摘要 |
A novel apparatus for a method of subsurface sampling which includes a sampling probe having a sample inlet in fluid communication with a sample outlet connected to a tube through which a subsurface medium can be conducted from a desired subsurface point below the earth's surface to a second point thereabove, one of a number of impact sleeves covers the sample inlet, while the sample inlet is covered by the lowermost of the impact sleeves, the probe is driven to a desired subsurface point and during the latter or when the subsurface point is reached, the sample inlet is uncovered thereby creating an uncontaminated flow path for a liquid or vapor sample medium at the desired subsurface point which can be transferred above surface for monitoring/analyzing. The sample inlets can be selectively uncovered during vertical descent for progressive sensing/analyzing, or alternatively the sample inlets can be themselves surrounded by a slotted impact sleeve to achieve vertical sampling without impact sleeve retraction.
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