| 摘要 |
Device comprises a test gas container 1 with a gas inlet pipe 2, a gas outlet pipe 3, a receiving aperture 4 for a testing tube 5 and a breaking-off device 6 for the tube tip 7. The tube 5 is connected to a sampling pump 9. Connecting pipes 2, 3 have non-return valves 11, 12 whose closure members 13, 14 are pressed by springs 15, 16 against the associated valve seats 17, 18. The non-return valves 11, 12 are fitted inside the connecting pipes 2, 3 so that only one sample gas flow is possible from the gas inlet 2 to the gas outlet 3. The gas inlet 2 is connected to a sampling source 19 outlet connecting pipe 3 is connected to a gas feed pump 20 to produce gas flow from the inlet 2 to the outlet 3. |
