Patent ID: 8228055

Claim:
An apparatus for measuring the magnetic flux of a coated conductor, comprising: a first and a second pair of permanent magnets, each permanent magnet having a magnetic north end and a magnetic south end, each magnet having the same shape as the other magnets or nearly the same shape, a first and a second pair of non-magnetic holders, each holder having a slot with a first end and a second end, each slot configured for receiving said first pair or said second pair of magnets, the magnets of a pair in a slot being adjacent each other where the south end of one magnet and the north end of the other magnet are at the same end of the slot, said first holder and second holder held in place opposite each other with a small space in between the holders for receiving a coated conductor, the slot of the first holder aligned with the slot of the second holder, the holders arranged with the north end of a magnet of the first holder nearest the south end of a magnet of second holder, wherein the device produces a magnetic field strength that becomes a minimum in the space between the first and second holder along an intersection between the first pair of permanent magnets and the second pair of permanent magnets, means for moving the coated conductor through the space in between the two holders, and means for adjusting said holders in a direction transverse to the coated conductor without readjusting the position of the holders relative to each other.