| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermal type flowmeter that prevents pollutants from adhering to a flow rate detecting part.SOLUTION: A thermal type flowmeter 300 of the present invention comprises a housing 302 including: a measurement part 310 inserted into the inside of a passage from a mounting hole provided on the passage wall of a main passage 124; and a flange 312 fixed to the passage wall of the main passage 124 while the measurement part 310 is inserted into the mounting hole. The flange 312 is formed with a recess 311 on a facing surface 312A facing a mounting surface 312B mounted to the main passage 124 of the flange 312, and a portion of the recess 311 is opened to a side surface 312C of the flange 312. |
