That heating element has 4 turns and looks to be a few cm across. It most likely consists of a copper wire coated in nickel. The relative permeabilities of which are ~1 and ~100, respectively.
If we're generous to ourselves and ignore the inhibiting effect of the nickel coating,It follows that the magnetic field created by your heating element, at its strongest point, will be roughly 1 Gauss (only a few times stronger than the magnetic field of the earth).