| 摘要 |
PROBLEM TO BE SOLVED: To set a reference point corresponding to a state before filling of a measuring object without using a plurality of types of sensor elements in a sensor device for measuring a position of a boundary surface of a measuring object.SOLUTION: A sensor device includes: a sensor circuit that measures capacitance of a sensor element to create data indicating measurement in order to measure a position of a boundary surface of a measuring object; and a control circuit that operates the sensor circuit at a predetermined time interval, and after a predetermined times of measurement are performed, if a change in measurement per unit time is within a threshold, sets a reference point on the basis of the measurement. |
