| abstract |
A sensor (1) includes a body member (132), a volume change body (14), and a detection member (133). The body member (132) has a flat plate-like shape, a first end (1321) in a first direction being supported, and a storage space opening at at least one of both end faces in a thickness direction. The volume change body (14), whose volume changes depending on an amount of a target, is supported by the body member (132) so that at least a part of the volume change body (14) is stored in the storage space. The detection member (133) is in contact with a second end (1322) in the first direction of the body member (132), and detects stress caused by the change in the volume of the volume change body (14). |