[en] The neutron spectrometer UGRA installed at 250 m time-of-flight path of IBR-30 booster was constructed for determination of neutron electric polarizability. The spectrometer is intended for precise measurements of angular distributions of neutrons with energies 0.5 - 60 keV which are scattered by heavy nuclei. The spectrometer represents a 3 m vacuum chamber which contains up to 3 scatterers and up to 16 ³He-detectors (each of them has volume ∼ 7 l) installed in the shielding blocks on a rotating platform. Some characteristics of the instrument are presented. (author)