  We have demonstrated a detection scheme for atom laser beams that allows for
a continuous measurement of the atom density and readout of the data in
real-time. The atoms in the atom laser beam are transferred locally from the
lower to the upper hyperfine ground state of $^{87}$Rb by coherent coupling and
are subsequently detected by an absorption measurement. The detection is
non-destructive to the Bose-Einstein condensate in the magnetic trap and the
atom laser beam remains unaffected outside the detection region.
