| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas analyzer which allows a gas sensor to be easily replaced without stopping a combustion engine during maintenance.SOLUTION: The gas analyzer includes: a gas sensor 50 which detects a prescribed component included in a gas to be measured, which flows in a gas duct 13; an air supply tube 42 which supplies cooling air for cooling a base end part 54 of the gas sensor 50; and a calibration gas supply tube 25 which supplies a calibration gas to a front end part of the gas sensor 50. The gas analyzer includes: a cylindrical guide probe 20 which projects into the gas duct 13 and is attached to an insertion tube 14 into the gas duct 13; and a cylindrical sensor probe 40 which has the gas sensor 50 provided at a front end thereof and is to be inserted into the guide probe 20. An outer surface of the gas sensor 50 and a front end-side inner surface of the guide probe 20 are joined by taper fitting. A fixing member for urging the sensor probe 40 toward the front end of the guide probe 20 to fix it is provided at the base end part of the guide probe 20. |
