A corpuscle /
plasma separating part is disposed at the lower end of the substrate, and a sensor part connected to the corpuscle /
plasma separating part is disposed at the upper end of the substrate, with a calibration solution reservoir being disposed on the lower side of the sensor part, and a calibration solution waste reservoir being disposed on the upper side of the sensor part. A first centrifugal axis is located upper to the corpuscle fraction storing part and lower to the
plasma fraction storing part of the corpuscle / plasma separating part, while a second centrifugal axis is located within or close to the sensor part. Conveyance and
discharge of the calibration solution can be carried out by performing
centrifugation around the first centrifugal axis which is distant from the sensor part at a
low speed of rotation, so that the
centrifugal force exerted on the sensors would be small. During the
centrifuge operation at a high speed of rotation for the separation of
blood corpuscles,
centrifugation can be performed around the second centrifugal axis so that the
centrifugal force exerted on the sensors is small.
Centrifuge operation allows separation of the
blood corpuscles and
blood plasma, and conveyance of the
blood plasma and the calibration solution, as Well as certain
discharge of the calibration solution from the sensors, thereby allowing precise analysis. Any damage in the sensors due to strong
centrifugal force during the separation of
blood corpuscles and
blood plasma can be prevented.