| 摘要 |
The invention concerns a gas sampling chamber 10 for use in single-gas analysers, wherein this chamber consists of an elongated hollow tube 21 provided with a mirror reflecting inner surface 22, which allows the tube to function as a luminous tube for guiding the radiation from the source 20 to the detector 16 through the test gas. Several openings 24 in the wall of the elongated hollow tube allow the gas to enter and leave. Smoke and vapour particles above 0.1 microns are kept out of the chamber by the use of a semipermeable membrane 28, which covers the openings in the hollow tube. Condensation of components of the test gas is prevented in that the test gas is electrically heated up to a temperature above the dew point of the particular component. <IMAGE> |
