| 摘要 |
PROBLEM TO BE SOLVED: To provide an abnormality determination device capable of determining whether or not a thermal flow sensor has an abnormality caused by dirt or the like.SOLUTION: An abnormality determination device 1 comprises: a thermal flow sensor 16 that is placed in a pipe 12 through which a measurement target fluid flows and measures a first flow rate of the measurement target fluid; a vortex flowmeter 20 that is placed in the pipe 12 and measures a second flow rate of the measurement target fluid; a flow rate comparison unit that performs the comparison between the measured first flow rate and the measured second flow rate; and an abnormality determination unit that determines whether or not the thermal flow sensor 16 has an abnormality on the basis of the results of the comparison. |
