  Cosmic ray studies, in particular UHECR, can be in general supported by a
directional, easy deployable, simple and robust detector. The design of this
detector is based on the time of flight between two parallel tiles of
scintillator, to distinguish particle passing through in opposite directions;
by fine time resolution and pretty adjustable acceptance it is possible to
select upward(left)/downward(right) cosmic rays. It has been developed for an
array of detectors to measure upward $\tau$ from Earth-Skimming neutrino events
with energy above $10^8 GeV$. The properties and performances of the detector
are discussed. Test results from a high noise environment are presented.
