Therefore, the switch S101 is applicable to the use of ON/OFF of the resistance type sensor 101, while the switch S102 is applicable to some kind or another control (See FIG. 12). [0124] As mentioned above, in the resistance type sensor 101 according to this embodiment, since the two displacement electrodes D101, D102 held at the power-supply voltage Vcc are arranged in such a relation as to be op