A sensor includes a probe that acquires a blood light absorber concentration in a subject and a cuff that acquires a non-invasive blood pressure of the subject. In the sensor, the probe is configured to be attached to an interdigital area between first and second digits of a hand or foot of the subject, or a palm of the hand, and the cuff is configured to be attached to one of the first digit, the second digit, a third digit of the hand or the foot, a wrist of the hand, and an ankle of the foot.
