Patent ID: 6595069
Filing Date: 2003-07-22
Classification: G01F,Y10T

Abstract:
An electromagnetic flow sensor for a fluid flowing through a pipe, said sensor having a measuring tube for conducting the fluid, said measuring tube can be inserted into the pipe, and said measuring tube comprising:a support tube as an outer covering of the measuring tube, a tubular liner of insulating material located in a lumen of the support tube, for conducting a flowing fluid isolated from the support tube, and a reinforcing body embedded in the liner for stabilizing the liner; a magnetic-circuit arrangement disposed on the measuring tube for producing and guiding a magnetic field which induces an electric field in the flowing fluid, said magnetic circuit-arrangement comprising at least one coil, a ferromagnetic first coil core magnetically coupled to the at least one coil and having an end face curved at least in sections, and a ferromagnetic second coil core magnetically coupled to the at least one coil and having an end face curved at least in sections; and electrodes for picking up a voltage from the said electric field, said first coil core having an end section fitted in a first coil-core seat within the reinforcing body in such a manner that said end face of the first coil-core is in positive contact with a surface of the first coil-core seat, and said second coil core having an end section fitted in a second coil-core seat within the reinforcing body in such a manner that said end face of the second coil-core is in positive contact with a surface of the second coil-core seat.