[en] Results of studies of a position-sensitive scintillation counter are presented. The coordinates of tracks in the counter have been calculated from the centre of gravity of light intensity in the scintillator. The light distribution has been measured by a system of strip light guides. The accuracy in localization of the track coordinates of electrons from a ₁₀₆Ru radioactive source is 3.0 mm. When the tracks are imitated by a collimated light diode (the slit width is 0.8 mm), the accuracy in determining the coordinate of the light source is 1.3 mm. Studies of the form of a light flash in the scintillator from the ₁₀₆Ru particles, the collimated light diode and cosmic rays are presented. (orig.)