Patent ID: 7112954

Claim:
A magnetically detectable particle for generating a temperature measurement for a batch or a continuous stream of material, the particle comprising: (a) a first and second magnet each comprising a positive and negative pole; and (b) an adhesive having a release temperature and operable to attach one or both of the positive and negative poles of the first magnet proximate to the same polarity pole of the second magnet or to attach one of the positive and negative poles of the first magnet between the poles of the second magnet below the release temperature such that a first magnetic field is generated by the first and second magnet, and operable to release the first and second magnets from one another above the release temperature, wherein the first and second magnets move with respect to one another when the adhesive releases the first and second magnets such that one of the positive and negative poles of the first magnet moves toward the opposing polarity pole of the second magnet for generating a second magnetic field different than the first magnetic field to indicate a temperature measurement for the batch or continuous stream.