▎ 摘　　要

NOVELTY - The device has a substrate (10) with a set of sensing regions, and a housing on the substrate. The housing separates one of the sensing regions from other sensing regions. A porous structure is provided within the housing, where the porous structure has through-holes. A temperature sensor is arranged adjacent to the former sensing region to sense a temperature of the latter sensing region. The porous structure includes a body with an outer surface defining the through-hole, and the body has an air gap. The body comprises one of graphene, transition metal chalcogenide, or MXene. USE - Button device for a humidity sensor e.g. electrical resistance type humidity sensor and capacitance type humidity sensor. ADVANTAGE - The humidity sensor has improved measurement sensitivity. The button device has high accuracy and is capable of operating in a non-contact manner. The sensitivity and reactivity at low relative humidity are improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the button device. Substrate (10) First electrodes (20) Second electrodes (30) First portion (31) Second portion (33)