FLUID MEASURING SENSOR MOUNTING STRUCTURE

PROBLEM TO BE SOLVED: To provide a fluid measuring sensor mounting structure in which measurement accuracy is improved without reducing a fluid transportation capability.SOLUTION: In a fluid measuring sensor mounting structure 1 for mounting a fluid measuring sensor 3 to a branch pipe 2a in piping branched to three or more ways to measure characters of fluids flowing through flow passages formed in the remaining branch pipes, a sleeve 4 is included which accommodates the fluid measuring sensor 3 therein. The sleeve 4 is a glass-shaped member comprised of an approximately cylindrical circumferential wall 4a and a protecting wall 4b which is provided at one end side of the circumferential wall and does not disturb functions of the sensor. In the vicinity of the protecting wall 4b of the circumferential wall 4a, a seal lip 5a is provided and the sleeve 4 is inserted into the branch pipe 2a in such a manner that the protecting wall 4b is disposed in the vicinity of a proximal end 2b of the branch pipe 2a.