| 摘要 |
A nondispersive, infrared gas analyzer comprises a body having a chamber for holding a sample gas to be analyzed, the sample gas chamber having a reflective inner surface, at least a portion of the inner surface being elliptical and defining a first focus and a second focus within the sample gas chamber and being operable to reflect radiation between the focuses, a sealed inert gas chamber for holding an inert gas, a sealed analyte gas chamber for holding an analyte gas, an infrared radiation source disposed at the first focus in the sample gas chamber, a reflector disposed at or around the second focus for reflecting radiation emitted by the radiation source and reflected by the reflective inner surface toward each sealed gas chamber, and a detector associated with each sealed gas chamber for detecting radiation, emitted by the source, which has travelled through the sample gas and the gas in its associated sealed gas chamber and for producing a signal representative of the concentration in the sample gas of the gas contained in its associated sealed gas chamber. |
