| 摘要 |
The infrared radiation gas analyser for determining the concentration of an ingredient in a sample comprises a sample cell(1) and an optical chopper(7). A filter(9) transmits infrared rays radiated from the ingredient in the sample heated by a heater (4) and an infrared detector(10) for detecting these rays. There may also be a reference cell by the side of the cell and radiation from it and the cell are alternately passed through the filter. The rear wall may be a reflector instead of a window(6b). |
