| 摘要 |
An atmospheric monitoring device of liquid impingement type comprising a vessel (10) for the liquid, with gas entry and exit ports (13, 14) above the liquid (24), and a nozzle (22) depending from the entry port into the liquid, is improved by transverse division into two chambers (11, 12) respectively below the ports, the chambers being separately intercommunicated (16, 15) above and below the liquid level, to produce a recirculatory action enhancing collection efficiency. The nozzle preferably extends substantially to the bottom of the entry chamber and below the lower chamber intercommunication. <IMAGE>
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