ODOR-MEASURING APPARATUS

PROBLEM TO BE SOLVED: To provide an odor-measuring apparatus for reducing frequency of replacement of odorless air generating sources and accurately measuring an odor over a long time. SOLUTION: The odor-measuring apparatus has odor sensors 106A, 106B for detecting the odor of a reference gas, measures the odor of a measured gas by using a detected result as a reference, and is provided with a plurality of the deodorizing odorless air generating sources 4a, 4b, 4c for generating reference gasses as the references for measuring the odor of the measured gas and a reference gas selective supply means for selectively supplying certain odorless air, generated by the odorless air generating sources, to the odor sensors 106A, 106B. The reference gas selective supply means is provided with reference gas supply tubes 34a, 34b, 34c, switching valves 33, 35, a relay tube 36 and a gas inlet tube 32. COPYRIGHT: (C)2004,JPO&NCIPI