Abstract: An electromagnetic flow meter for measuring the flow of conductive fluids, e.g. blood, in an extracorporeal circuit. The electromagnetic flow meter utilizes two electromagnets positioned in the housing of a transducer unit, and a disposable insert easily insertable into a tray which slides into a cavity of the housing. The electromagnets generate, at any one time, two magnetic fields having same directions. The conductive fluid flows in a direction perpendicular to the direction of the magnetic fields for inducing first and second voltages. First and second voltage sensing electrodes extend into the bore of the disposable insert and provide the voltages, generated by the fluid flow cutting through the magnetic fields, to first and second slide terminals in the housing. The voltages are provided to a summation amplifier via respective isolation amplifiers, wherein the summation amplifier generates a summation voltage proportional to the flow rate of the conductive fluid passing through the magnetic fields.

Abstract: An electromagnetic flow meter for measuring the flow of conductive fluids, e.g. blood, in an extracorporeal circuit. The electromagnetic flow meter utilizes two electromagnets positioned in a portion of the housing of a transducer unit, and a disposable insert easily insertable into a cavity of the housing. The electromagnets generate, at any one time, magnetic fields having opposite directions. The conductive fluid flows in a direction perpendicular to the direction of the magnetic fields for inducing first and second voltages. First and second electrodes extend into the bore of the disposable insert and provide the voltages, generated by the fluid flow cutting through the magnetic fields, to first and second pick-up sockets in said housing.

Abstract: An electromagnetic type fluid flow meter for measurements of conductive fluids which utilizes an interchangeable disposable electrode sensor assembly with a common magnetic drive assembly. The electrode sensor assembly includes a tubular member adapted to be connected into a flow line and which includes sensor electrodes and an electrical connector for providing external electrical connections to electrodes. An electromagnetic assembly includes a C-shaped magnetic core and a winding on the core. Parallel guide members on the electromagnetic assembly receive mating guides on either side of the tubular member in sliding engagement to hold the tubular member between the poles of the magnet with the electrodes properly oriented with respect to the flux lines. The electromagnetic assembly includes an electrical connector which engages the connector on the tubular member when it is inserted in the guides.