| 摘要 |
PROBLEM TO BE SOLVED: To provide a volatile organic matter sensor having high sensitivity, low in cost, and enhanced in precision. SOLUTION: The volatile organic matter sensor comprises an index substance changed to a second state from a first state by the contact with a predetermined volatile organic matter, a temperature control part for controlling the temperature of the index substance, a first light emitting device for irradiating the index substance with light of a first wavelength, a second light emitting device for irradiating the index substance with light of a second wavelength different from the first wavelength, a light detecting device for detecting the reflected light or transmitted light from the index substance to output an electric signal and a control part observing the first electric signal, which is output by irradiating the index substance with the light of the first wavelength from the first light emitting device and detecting the reflected light or transmitted light from the index substance by the light detecting device, and the second electric signal, which is outputted by irradiating the index substance with the light of the second wavelength from the second light emitting device and detecting the reflected light or transmitted light from the index substance by the second light emitting device, to discriminate the state of the index substance on the basis of the first and second electric signals to evaluate the presence of the volatile organic matter in a gas to be evaluated. COPYRIGHT: (C)2006,JPO&NCIPI
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