Fluid measuring device

The present invention provides a high precision fluid measuring device. The fluid measuring device having an input and an output of the first and second signals from the second signal output from the second detecting element (S2) of the circuit, the circuit portion from the first signal (S1) output from the respective first detecting element state determining unit state of a third signal (S3) of the signal processing unit determines the first signal, and a control unit amount of the determination result of the status determination unit controls variation change of the first signal to the third signal to bring the.