Abstract: A measurement device including an insertion port into which a sensor is inserted and plural terminals that contacts the sensor, wherein the terminals slide on a contact surface of the sensor at which a measurement target component is measured, a first electrode group located on a rear end side and a second electrode group located on a farther distal end side are provided on the contact surface, the plural terminals receive normal forces from the contact surface and include a first terminal group that contacts the first electrode group on a side closer to the insertion port than a side on which a second terminal group contacts the second electrode group, and a sum of normal forces that the first terminal group receives from the contact surface is smaller than a sum of normal forces that the second terminal group receives from the contact surface.

Abstract: A measurement system including a sensor and a measurement device including an insertion port for the sensor, wherein the measurement device measures a measurement target component at the sensor and includes plural terminals contacting the sensor, and the terminals slide on a contact surface of the sensor, the contact surface has a first electrode group on a rear end side and a second electrode group on a distal end side, the plural terminals receive static frictional forces from the contact surface and include a first terminal group contacting the first electrode group on a side closer to the insertion port than a side on which a second terminal group contacting the second electrode group, and a sum of static frictional forces that the first terminal group receives from the contact surface is smaller than a sum of static frictional forces that the second terminal group receives from the contact surface.

Abstract: A measurement apparatus to measure a physical quantity related to a measurement target by use of a sensor, comprising: an apparatus enclosure; a control unit to be electrically connected to the sensor; and a moving member including a sensor holding unit to hold the sensor, the moving member being movable to protrude the sensor holding unit outwardly of the apparatus enclosure and further including a conductive member to electrically connect the sensor to the control unit.

Abstract: A sensor insertion method for inserting a sensor into a user's body is provided. The method includes a unit fixing step of regulating a relative position between a sensor control unit and an inserting unit, where the sensor control unit is in a sensor insertion allowing state, and the inserting unit contains the sensor. In this step, the sensor control unit and the inserting unit are fixed to an insertion target portion of the user. Then, in a sensor inserting step, the inserting unit is caused to insert the sensor into the insertion target portion. In a sensor connecting step, the sensor control unit is shifted from the sensor insertion allowing state to a sensor connecting state, whereby electrical conduction is established between the sensor in the insertion target portion and the sensor control unit.

Abstract: A measurement apparatus to measure a physical quantity related to a measurement target by use of a sensor, comprising: an apparatus enclosure; a control unit to be electrically connected to the sensor; and a moving member including a sensor holding unit to hold the sensor, the moving member being movable to protrude the sensor holding unit outwardly of the apparatus enclosure and further including a conductive member to electrically connect the sensor to the control unit.