FIELD: control and monitoring. SUBSTANCE: device comprising a stand oriented parallel to plane axis is proposed for installation inside cylindrical cavity with radial openings a monitoring member, such as a holder of a sensor using Foucault currents principle. This stand may take different positions to index rotation and forward motion inside the cavity using a mechanism, the position could be preset in advance. Working head installed on stand end may be moved within predetermined working area of cavity internal surface using pantograph and disposition lever in any of the indexing position. For this purpose the working head is held down by the lever. Individual pneumatic jacks are provided to control motion of the head. EFFECT: stem generator inside monitoring. 9 cl, 8 dwg
