Curie point type magnetic temperature sensing detector

Details Curie point type magnetic temperature sensing detector Curie point type magnetic temperature sensing detector

G - Physics

01

K

340/159

G01K 7/36 (2006.01) F16L 59/14 (2006.01) G01K 7/38 (2006.01)

Patent

CA 1064141

ABSTRACT 1. Method for detecting temperature variations above or below a predetermined value comprising, providing in the area where the temperature variations are to be detected, a quantity of ferromagnetic material having a Curie Point approximately equivalent to the predetermined temperature together with at least two electrical conductors arranged in such a manner that when the ferromagnetic material is at a temperature below its Curie Point and a first varying electrical current is passed along a first electrical conductor a second varying electrical current is induced in a second of the electrical conductors; passing a first varying electrical current along said first electrical conductor and monitoring the second varying electrical current induced in the said second electrical conductor; the magnitude of the induced current will vary according to the magnetic permeability of the ferromagnetic material selected.

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