  The measurement of neutrino magnetic moment larger than $10^{-19}\mu_B$ would
be a clear signature of physics beyond the standard model other than the
existence of massive Dirac neutrinos. The use of a spherical proportional
counter detector filled with gas at 40 bar located near a nuclear reactor would
be a simple way to perform such a measurement exploiting the developments made
on such a technology for the search of dark matter and neutrinoless double beta
decay. Different targets can be used just by replacing the gas: xenon, CF$_4$
and argon were compared and the sensitivity in one year of data taking could
reach the level of $4.3 \times 10^{-12} \mu_B$, $6.5 \times 10^{-12} \mu_B$,
and $8.5 \times 10^{-12} \mu_B$, respectively.
