Abstract: A probe for an electromagnetic flowmeter in miniaturized format, particularly for blood flow measurements, has two magnetic coils which are oppositely wound on a toroidal core of permanent magnetic material. Two electrodes respectively connected to the coils are disposed inside the core. The core has a layer structure of extremely thin wafers of material having high magnetic resonance and thin insulating layers in alternation. For re-magnetization of the core, the coils are charged with extremely brief and high current pulses. The measured signal is taken when the pulsed current for magnetization of the coils has decayed.