  Absolute measurements of neutron flux are an essential prerequisite of
neutron-induced cross section measurements, neutron beam lines characterization
and dosimetric investigations. A new gaseous detector has been developed for
measurements of 0.2 to 2 MeV neutron flux based on proton-recoil process. The
detector, consisting of two segmented ionization chambers read by Micromegas
technology, has beed conceived to provide quasi-absolute neutron flux
measurements with an accuracy of \simeq3%. The gas pressure flexibility makes
the telescope non sensitive to {\gamma} and electrons background, and therefore
advantageous over semi-conductor materials as a neutron flux instrument. The
adjustable gas pressure and H-sample thickness, the use of Micromegas
technology and the tracking capabilities allows the detection of neutrons on a
large dynamical range and down to 200 keV with a good rejection of scattered
neutron events and random background
