  The high school project on astrophysics research with cosmics (HiSPARC)
employs a large number of small detection stations that sample the footprint of
extensive cosmic ray air showers. The majority of these stations has two 0.5
\si{\meter\squared} scintillation detectors. A new method is presented which
enables probing the cosmic ray flux with a single two-scintillator station in
five energy decades at $10^{12}$, $10^{13}$, $10^{14}$, $10^{15}$ and $10^{16}$
eV. The method is based on the energy dependence of the distribution of the
number of particles passing through a single detector. A relatively short data
taking period of approximately one month is sufficient to probe this energy
range. The flux values agree well with measurements by other experiments. For
the first time, the cosmic ray flux at $10^{12}$ and $10^{13}$ eV is derived at
sea level.
