| 摘要 |
PURPOSE:To in its component gas measurement accuracy and stability by directly detecting part of the light of an infrared-ray source as a comparison detecting optical signal and comparing the detection optical signal with a measured signal corresponding to the concentration of a measured component gas. CONSTITUTION:The title absorption type gas analyzer is provided with an infrared ray source 2 on the incident side of a measurement cell 1 into which a sample gas is introduced and a detecting section 4 constituted by incorporating infrared sensors in a sensor fitting block together with band-pass filters on the emission side of the cell 1. A light reflecting cell 14 which reflects incident light from the source 2 is provided between the incident-side end face of the cell 1 and the source 2 and an infrared-ray flux is introduced into the cell 1 through the cell 14. On the other hand, a second light emitting window is installed to the cell 14 and a comparison detector 9 is arranged against the cell 14. By directly detecting an infrared-ray flux as a comparison detecting optical signal, a comparison detecting optical signal which receives no influence from a component gas can be obtained. |
