QUANTUM TYPE IR SENSOR AND QUANTUM-TYPE IR GAS CONCENTRATION METER USING SAME

摘要

The present invention relates to a quantum infrared sensor and a gas concentration meter using the same, the quantum infrared sensor having a small and simple device shape and also being capable of performing stable measurement against disturbance changes such as changes in the flow amount and the temperature of gas to be measured. The quantum infrared sensor includes a pair of quantum infrared sensor elements (13a, 13b), a pair of optical filters (16a, 16b) and a holding frame (15). The pair of optical filters (16a, 16b) is provided closer to an infrared light source than is the pair of quantum infrared sensor elements (13a, 13b). The pair of optical filters (16a, 16b) is configured to selectively transmit infrared rays in specific different wavelength ranges, respectively. The pair of optical filters (16a, 16b) is housed in an upper level of the holding frame (15) and provided while facing the pair of quantum infrared sensor elements (13a, 13b) through a pair of through holes (15a, 15b), respectively. Further, a quantitative analysis of gas concentration can be conducted using Lambert-Beer law by use of the quantum infrared sensor having such a configuration.