Patent ID: 8215160

Claim:
A sensor structure in which a mass air flow measurement device configured to measure intake mass air flow in an intake tube and a humidity sensing device configured to detect humidity in the intake tube are formed in an integrated manner, the sensor structure comprising: a bypass air passage through which part of air flowing through the intake tube is taken in; a mass air flow sensing element configured to detect the intake mass air flow and mounted inside the bypass air passage; a second bypass channel provided in addition to the bypass air passage; a humidity sensing element configured to come into direct contact with a portion of the intake air and mounted inside the second bypass channel; an electronic circuit board, on which the humidity sensing element and a drive circuit part of the humidity sensing element are mounted; and a base plate configured to hold the electronic circuit board through adhesion; wherein the base plate comprises a first base plate and a second base plate that has a greater heat conductivity rate than the first base plate; the base plate at a position where the humidity sensing element is mounted comprises the first base plate; and the base plate at a position where the drive circuit part is mounted comprises the second base plate.