| 摘要 |
PURPOSE:To prevent a sensor from being used in the nonlinear operation region thereof and enable the sensor to measure a blood component to the approximate limit of the linear region of the sensor. CONSTITUTION:A sensor 1 detects a predetermined blood component in a reactor. Arithmetic means 2A obtains the value of the predetermined blood component from the difference between the outputs of the sensor 1 before and after a blood sample is injected into the reactor. The result of the calculation by the means 2A is displayed on a display 3. Further, the output of the sensor 1 after the blood sample is injected into the reactor is compared with the threshold of an alarm smaller than the limit of the linear operation of the sensor 1 by a prescribed value. When the output of the sensor 1 exceeds the threshold value smaller than the upper limit output value of the linear operation region of the sensor 1 by the prescribed value, comparator means 2B produces an output and an alarm unit 4 operates in response to the output of the comparator means 2B.
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