FIELD: measurement instruments; applicable in control of parameters of pipe driving in ground. SUBSTANCE: instrument has member following-up motion of pile, motion meter made in form of resistor path and control panel. Follower is made in form of magnetic slides moving over guide. System of extensible and reference tubes transforms motion of slider in motion of current pick-off electrodes interacting with resistor path and standardized net of current conducting strips. Control panel is connected with motion meter by means of flexible cable. EFFECT: higher efficiency. 9 dwg
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