| 摘要 |
PURPOSE:To enable simultaneous measurement of temperature and density of a gas keeping intact the condition during the reaction without suction and collection, by employing a semiconductor laser as light source to generate an infrared rays with a large power within a narrow wavelength range. CONSTITUTION:A temperature controller 3 and a current controller 2 are control so that a semiconductor laser 1 will oscillate upto a desired wavelength. Then, a measuring light and reference light divided by a half mirror 5 are inputted into a data processing section 11 as a measuring signal and a reference signal respectively. The processing section 11 computes transmissivity of the measuring light from the measuring signal and the reference signal. Also a sweep current value is inputted into a processing section 11 from the current controller and from the relationship between a sweep current and an oscillation wavelength of a laser 1, the processing section 11 computes the oscillation wavelength of the laser 1 using the sweep current value. In this manner, the temperature and density of a gas can be measured simultaneously keeping intact the condition during the reaction without suction and collection.
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