  We investigate the dual superconductivity mechanism in the exceptional group
$G_2$. This is a centerless group (no 't Hooft flux vortices are allowed) and
we check for the presence of a magnetic monopole condensate in the confined
phase by measuring on the lattice a disorder parameter related to the vacuum
expectation value of an operator carrying magnetic charge. The behaviour of the
disorder parameter is consistent with the dual superconductor picture. A first
step of an analysis on the thermodynamical properties of the theory is
conducted by mean of this operator.
