| 摘要 |
PURPOSE:To measure the temp. of a specimen, etc., in a medical circulatory circuit using a biofluid, etc., in real time with high accuracy by providing a thermistor element, etc., of <=1mm diameter, and temp. determining means which determine the temps. by repetitive arithmetic processing in accordance with the resistance thereof. CONSTITUTION:An input device 1a is an input device for measuring gaseous ions and concn. of oxygen and is constituted of a high input resistance voltmeter 11 for measuring electromotive force, thermometers 12, 13 for measuring internal temp. and soln. temp., etc. in order to the simultaneous temp. measurement for internal compensation. The constant current sources thereof are so set that the electric power consumption of the thermistor element attains <=50muW. The voltages when said constant currents are passed to the thermistor are measured by AD converters 14, 15. The resistance values from the thermistor are thereby converted 14, 15 to decimal values. The values are fed through an optical fiber cable 4, an interface 2 and a cable 5 to an arithmetic processor 3 where the temps. are calculated at a high speed with accuracy according to an arithmetic program.
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