Patent attributes
A method achieving a small spatial restriction and capable of simply measuring with high precision a flow rate of a conductive fluid of an electromagnetic pump is provided. In particular, the method is suitable in measuring a flow amount of each electromagnetic pump in an electromagnetic pump unit where a plurality of electromagnetic pumps are arranged in parallel in one pump vessel. The method includes: measuring, by a magnetic sensor such as a magnetic flux density measuring coil 6, arranged in the vicinity of a outlet end 2 of an electromagnetic pump 1, a magnetic flux density of a magnetic field 4 that is generated in the electromagnetic pump 1 and pushed out from the outlet end 2 of the electromagnetic pump 1 due to a flow of a conductive fluid 5; and measuring a flow amount of the electromagnetic pump 1 from a previously calculated relationship between the magnetic flux density of the magnetic field 4 pushed out from the outlet end 2 of the electromagnetic pump 1 and a flow amount of the conductive fluid 5.
