Sensor structure

Provided is a sensor structure capable of achieving both the resistance to pollution and the measurement performance such as humidity responsiveness. Also provided is a multifunction sensor capable of facilitating integration of detecting devices for various physical quantities. Specifically, the sensor structure includes: a housing 7 including a connector 5 that mediates an input/output exchange with an outside and a terminal 6 of the connector; and an electronic circuit board 9 that is mounted inside of the housing and includes a humidity sensing element 8, the terminal of the connector and the electronic circuit board being electrically connected to each other, the sensor structure being inserted to be attached to an airflow tube 1 through which a main air flows, via a seal material 11 provided in the housing. The housing includes a plurality of bypass channels 13 that each communicate an inside of the housing with an inside of the airflow tube. The plurality of bypass channels are each provided at an offset point with respect to a flow direction of the main air flowing through the airflow tube, and each have an opening near an inner wall surface of the airflow tube.