Sensor unit in exhaust gas analyzer

Details Sensor unit in exhaust gas analyzer Sensor unit in exhaust gas analyzer

2011-05-03

2011-05-03

Toatley, Gregory J (Department: 2877)

Optics: measuring and testing

For light transmission or absorption

Of fluent material

C073S023200, C073S001060, C356S444000, C356S432000, C250S339100, C250S339050

Reexamination Certificate

active

07936460

ABSTRACT:
An exhaust gas analyzer of the present invention includes a sensor unit11installed in an exhaust path from an engine, applies laser light to exhaust gas emitted from the engine and receives laser light that has passed through the exhaust gas so as to measure the concentration of a component contained in the gas based on the received laser light. To an aperture16formed in a sensor base15of the sensor unit11, an adjustment ring40in a circumferential face of which small holes41serving as a laser light passage portion is formed and whose inner circumferential face serves as an exhaust gas passage opening21is detachably fitted, whereby the sensor unit can be attached so as to conform to different inner diameters of exhaust tubes.

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