I have lived in tropical coastal areas and noticed quite large changes in local humidity but no particular change in local temperature. (theinconvenientskeptic.com)
These images depict how the photonic sensor translates finger movements into color changes, as the photonic crystal reacts to the change in local humidity caused by the approach of the finger without direct contact. (sciencedaily.com)
There were three silica gels kept inside the box which are used as a desiccant to control local humidity to avoid spoilage. (anamikaojha.com)