FIELD: measuring equipment, in particular, measurement of surface contours with the aid of ionizing radiation, applicable for determination of the relief and level of the surface of charge materials on the blast furnace top. SUBSTANCE: the collimators of the source units are made movable with mechanisms for turning relative to the collimation axes, and new couplings between the turning mechanisms are introduced, due to which reduction of the required activity of the sources of ionizing radiation is ensured by several times. EFFECT: enhanced reliability of surface control and enhanced radiation safety of the device operating conditions. 1 dwg
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