Patent attributes
A body fluid component measuring system which is capable of continuous measurement and reduces downtime includes a sensor unit which is positionable indwelling in the skin of a subject and which measures a predetermined body fluid component included in the body fluid of the subject; and a transmission unit which is detachably attached to the sensor unit and which calculates blood glucose level based on measurement data measured by the sensor unit, and transmits the calculated blood glucose level to a display unit. Identification information for establishing communication between the transmission unit and the display unit is stored in the sensor unit, and the transmission unit, upon activation, uses the identification information read out by the sensor unit to establish communication with the display unit.