Abstract: An electrolyte analysis device includes a substrate extending in one direction, a main base portion provided on a main surface of the substrate, an ion selective film provided to be in contact with the main base portion so as to cover the main base portion, and an auxiliary base portion provided on the substrate. In a state where the electrolyte is in contact with a side of one end of the substrate so as to cover the side of the one end, a peeling determination unit obtains a potential of the main base portion and a potential of the auxiliary base portion, respectively. Whether or not the ion selective film is peeled from the main base portion is determined based on a potential difference between an obtained potential of the main base portion and an obtained potential of the auxiliary base portion.

Abstract: To provide a technology that can suppress an operation unintended by a user caused by an erroneous operation by the user. An electrochemical sensor according to one aspect of the present invention is for measuring a concentration ratio between sodium ions and potassium ions in a liquid to be measured that includes: a sensor head; and a calculation unit that allows performing a calibration operation and a measurement operation. The calibration operation calculates a characteristic parameter of the sensor head based on sensing data of the sensor head in a state where the sensor head is brought into contact with a calibration agent. The measurement operation calculates the concentration ratio based on the characteristic parameter of the sensor head and the sensing data of the sensor head in a state where the sensor head is brought into contact with the liquid to be measured.

Abstract: The electrolyte analysis test strip of the present invention includes a substrate extending in one direction. A first ion-sensitive film provided in a specific region on the one end side in the one direction and a first extraction electrode extending from the first ion-sensitive film to the other end side are provided on one main surface of the substrate. A second ion-sensitive film provided in a specific region on the one end side and a second extraction electrode extending from the second ion-sensitive film to the other end side are provided on the other main surface of the substrate. The first ion-sensitive film and the second ion-sensitive film each come into contact with an electrolyte to generate a first potential corresponding to a concentration of a first ion species and a second potential corresponding to a concentration of a second ion species, respectively.

Abstract: In the present invention, a blood pressure measuring cuff is worn around a rod-shaped site to be measured of a subject in a circumferential direction. A light projecting unit is disposed only along an edge portion on one side or both sides of the cuff in a width direction, and irradiates a periphery of a target region of the site to be measured with light. A light receiving unit is provided in a sheet shape along a specific portion facing the target region on an inner surface of the cuff, and receives light scattered or reflected by the target region to obtain an image including a vein pattern of the target region. An authentication unit compares the vein pattern with a reference vein pattern registered in advance, and performs the vein authentication on the subject.