Abstract: An electromagnetic flowmeter has first and second magnetic field generating units. The first magnetic field generating unit applies a first magnetic field having a square wave of 4 to 8 Hz to a fluid to be measured. The second magnetic field generating unit applies a second magnetic field having a square wave of 25 to 35 Hz independently of the first magnetic field. A first electromotive force signal induced by the first magnetic field and a second electromotive force signal induced by the second magnetic field are detected by electrodes. A determination circuit determines whether the first electromotive force signal is normal and outputs a determination result. A first signal processing circuit generates a first flow rate signal on the basis of the first electromotive force signal. A second signal processing circuit generates a second flow rate signal on the basis of the second electromotive force signal.