| 摘要 |
PURPOSE: A non-dispersive infrared gas analyzer of half-opened type is provided to minimize distortion of a measured value derived from surroundings to be measured by using a light source, a sensor, a light absorbing tunnel, and a light absorbing area. CONSTITUTION: A non-dispersive infrared gas analyzer of half-opened type includes a light source(10), a sensor(20), a light absorbing tunnel(30), and a light absorbing area(31). The light source(10) emits infrared rays toward the sensor(20). The sensor(20) is spaced from the light source(10) with a predetermined distance and is in opposition to the light source(10). The sensor(20) is used for measuring infrared rays with a specific wavelength. The light absorbing tunnel(30) is spaced from both the sensor(20) and the light source(10) with a predetermined distance, receives air to be measured, and provides a path on which light travels. The light absorbing tunnel(30) includes the light absorbing area(31). |
