Abstract: A proximity sensor including a first substrate, a second substrate, a first connecting member, at least one first electrode, and a detection part. The first substrate is disposed in the vicinity of a first detection space. The second substrate is disposed on an opposite side of the first substrate to the first detection space. The second substrate faces the first substrate. The first connecting member connects the first substrate and the second substrate. The at least one first electrode is provided on the first substrate and configured such that a signal from the at least one first electrode changes in response to a change in a first capacitance caused by a detection target approaching to the first detection space. The detection part is provided on the second substrate and configured to detect the approach of the detection target based on the signal from the at least one first electrode.

Abstract: A proximity sensor including a first substrate, a second substrate, a first connecting member, at least one first electrode, and a detection part. The first substrate is disposed in the vicinity of a first detection space. The second substrate is disposed on an opposite side of the first substrate to the first detection space. The second substrate faces the first substrate. The first connecting member connects the first substrate and the second substrate. The at least one first electrode is provided on the first substrate and configured such that a signal from the at least one first electrode changes in response to a change in a first capacitance caused by a detection target approaching to the first detection space. The detection part is provided on the second substrate and configured to detect the approach of the detection target based on the signal from the at least one first electrode.

Abstract: A breath component measurement apparatus includes a breath residence case. The breath residence case includes a container in the shape of a rectangular parallelepiped, an intake pipe in the shape of a circular tube which is provided at the center of a front face of the container, a pump which is formed over the whole right side surface of the container, a sensor storage unit in the shape of a circular tube which is provided at the center of a bottom surface of the container, a gas sensor which has the shape of a circular column and is stored in the sensor storage unit, a disk-shaped piezoelectric element which is supported by a groove in a slot, the slot that is formed on a left side surface of the container and has the groove supporting the piezoelectric element, and an exhaust port.