Flow rate measurement system

A flow rate measurement system being a flow rate measurement system that measures a flow rate of molten metal flowing through a hollow portion of a pipe, the flow rate measurement system comprising:

• an excitation coil that generates a magnetic field so as to intersect with the molten metal flowing through the hollow portion of the pipe;
• current supply processor circuitry that supplies an alternating exciting current to the excitation coil;
• a detector that detects a signal based on a magnetic field generated from the excitation coil by an alternating exciting current flowing through the excitation coil or a time variation in the magnetic field;
• and
• flow rate deriving processor circuitry that derives the flow rate of the molten metal based on the signal detected by the detector, wherein
• the pipe is arranged between the excitation coil and the detector, and
• a magnetic field generated by the excitation coil, the magnetic field crossing the pipe and reaching the detector that is disposed to face the excitation coil, with the pipe interposed therebetween.