SENSOR UNIT OF EXHAUST GAS ANALYZER

摘要

An exhaust gas analyzer where a sensor unit (11) is installed in an exhaust gas route from an engine, laser light is applied to exhaust gas from the engine, the laser light transmitted through the gas is received, and the concentration of components contained in the gas is measured based on the received laser light. An adjustment ring (40), in the peripheral surface of which a small hole (41) functioning as a laser light passing section is formed and whose inner peripheral surface functions as an exhaust gas passing opening (21), is removably fitted in an opening (16) formed in a sensor base (15) of the sensor unit (11). The analyzer can be attached to exhaust pipes having different inner diameters.