| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas analytical sensor capable of enhancing measuring precision of an exhaust gas. SOLUTION: This exhaust gas analytical sensor 4 provided with an irradiation part 5 for emitting a laser beam for exhaust gas analysis toward an inside of an exhaust gas passing through hole 41, in a sensor main body 40 drilled with the gas passing through-hole 41 through which the exhaust gas discharged from an engine 20 passes, and a photoreception part 7 for receiving the laser beam transmitted in the exhaust gas, includes an introduction side light passing optical path 56 for introducing the laser beam emitted from the irradiation part 5 into the exhaust gas passing through-hole 41, a drawing-out side light passing optical path 76 for drawing out the laser beam transmitted in the exhaust gas from the exhaust gas passing through-hole 41 to the photoreception part 7, laser beam transmitting lens members 52, 72 arranged to partition an inside of the introduction side light passing optical path 56 and an inside of the drawing-out side light passing optical path 76, respectively into a plurality of areas, and gas supply and discharge routes 8, 9 for supplying and discharging an inert gas to/from respective areas in the introduction side light passing optical path 56 and the drawing-out side light passing optical path 76 partitioned by the lens members 52, 72. COPYRIGHT: (C)2008,JPO&INPIT
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